The Redbrick Encyclopedia

TLAs

TLA - Three Letter Acronym

A short hand way of referring to something. TLAs are one of the most commonly used forms of acronym, more common than ETLAs (Extended Three Letter Acronyms), SAs (Short Acronyms) and Is (Initials).

TLA is also a TLA for:

Temporal Logic of Actions: a logic for specifying and reasoning about concurrent and reactive systems.
Texas Library Association: The Texas Library Association was established in 1902 to promote and improve library services in Texas.
Tennessee Library Association: Tennessee was the third southern state to organize a library association.

There are many TLAs in regular use, here are a few:

0AA Zero Angle of Attack (aircraft; not duplicates)
0CS Zero-Current Switching (not duplicates)
0MP Zero Moving Parts (not duplicates)
0MP Zero-Motion Part (not duplicates)
0OE Zero-Order Equation
0VC Zero-Voltage Control
1BB One-Beam Balance (not duplicates; both are used)
1BB Single-Beam Balance (not duplicates; both are used)
1FS One-Finger Salute
1GL First-Generation Language (machine language)
1H4 One Henry Four (Shakespeare)
1OE First-Order Equation
1PS One-Pole Switch
2BB Two-Beam Balance (not duplicates; both are used)
2BR Two Bath-Room
2CP Second-Class Postage
2DE Two-Dimensional Echocardiogram
2GL Second-Generation Language (assembly language)
2PS Two-Pole Switch
2WD Two-Wheel Drive
3BR Three Bath-Room
3CP Third-Class Postage
3DC Triple-Disc Clutch (automotive)
3LA Three-Letter Acronym ($)
3WW Third Weather-Wing
4BB Four-Beam Balance (tare beam; not duplicates; both are used)
4GL Fourth-Generation Language
4HT Four-door Hard-Top
4PS Four-Pole Switch
4TS Four-Track Stereo
555 Five-Five-Five (slang for good radio reception [or other] conditions; see 000, 0B0, 0X0, 5B5, 5X5, ZBZ, ZXZ, ZZZ)
555 Five-Five-Five (slang for good radio reception [or other] conditions; see 5B5, 5X5)
5BX Five Basic eXercises ('X' for 'exercises')
5WW Fifth Weather-Wing (military)
5X5 Five-By-Five ('X' for 'by'; see 000, 555, 5B5, ZZZ))
6WD Six-Wheel Drive
7WW Seventh Weather-Wing
8BP Eight-Ball Player
8TC Eight-Track Cartridge
8TP Eight-Track Player
9BN Nine-Bit Network
A0S Automatic Zero-Set
A3I Army Aircrew-Aircraft Integration (not duplicates; 'A3' [A cubed] for 'AAA'; military)
AAA Action on Alcohol Abuse
AAA Active Acquisition Aid
AAA Advanced Audio Alliance
AAA Advertise And Award
AAA Agricultural Adjustment Act
AAA Air Assistant Attache (duplicates?) *
AAA Alianza Anticommunista Argentina
AAA American Academy of Achievement
AAA American Academy of Anatomists
AAA American Academy Of Anatomists
AAA American Acupuncture Association
AAA American Anthropological Association
AAA American Australian Association
AAA Analog Analog Analog (code on CD; impossible, but joked about)
AAA Analog-to-Analog Adapter
AAA Annals. American Academy of the Political and Social Science
AAA Apostolic Anti-communist Alliance
AAA Arts Action Australia
AAA Asian-American Almanac
AAA Assistant Air Attache (duplicates?) *
AAA Association of Accounting Administrators
AAA Australian Aromatherapists' Association
AAA Auxiliary Array Antenna
AAB Acquisition Advisory Board
AAB Adaptive Angle Bias
AAB Aircraft Armament Bulletin
AAB Anti-Aircraft Battery
AAC Abort Advisory Channel
AAC Access Audiotext Corporation
AAC Acquisition Advice Code
AAC Aerated Autoclaved Concrete
AAC Air-carbon Arc Cutting
AAC All America City
AAC All-Aluminum Conductor
AAC Amateur Athletic Club
AAC American Association of Criminology
AAC Anglo-American Code
AAC Anti-Aircraft Common
AAC Antibiotic-Associated pseudomembranous Colitis
AAC Arabinosylaz-A-Cytidine (chemical)
AAC Army Area Command (military)
AAC Association of American Colleges
AAC Attack Aircraft Carrier
AAC Australian Aerobatic Club
AAC Automatic Answer Card
AAC Aviation Armament Change
AAD Advanced Ammunition Depot
AAD Aircraft and Armament Development (not duplicates)
AAD Aircraft Armament Division (not duplicates)
AAD American Academy of Diplomacy
AAD Aminoa-Dipic Acid (chemical)
AAD Army Air-Defense (military)
AAE Abort Advisory Equipment
AAE Accredited Airport Executive
AAE Aerospace Auxiliary Equipment
AAE Afghan Agriculture Experiment
AAE Ancillary Armament Equipment
AAE Army Aviation Engineers (military)
AAE Associate of Accountants' and Executives' Corp. of Canada
AAE Azimuth And Elevation
AAF Army Air Force (military)
AAG All-American Girl
AAG American Annuity Group
AAG Association of American Geographers
AAG Auxiliary Attitude Good
AAH Association of Ancient Historians
AAI Age-Appropriately Immunized
AAI Agricultural Ammonia Institute
AAI Airport Acceptance Interval
AAI American Association of Inventors
AAI Associate of the Chartered Auctioneers' and Estates Agents' Institute
AAI Association Actuarielle International (language?)
AAI AUTODIN/ AUTOVON Interface
AAI Auxiliary Armament Interconnect
AAL Academy of Arts and Letters
AAL Air Atlantic Limited
AAL Air Atonabee Ltd.
AAL Arctic Aeromedical Laboratory
AAL Arctic Aerospace Laboratory
AAL ATM Adaptation Layer (miscontrivance)
AAM Advisory Agricultural Meteorologist
AAM Agricultural And Mechanical
AAM American Agriculture Movement
AAM Army Air Mobility (military)
AAM Associate Administrator for Management
AAM Association of Assistant Mistresses in Secondary Schools
AAN Aliphatic Ammonium Nitrate (chemical)
AAN American Academy of Neurology
AAN Analgesic-Associated Nephropathy
AAN Automotive Aftermarket News
AAO Am Angefuehrten Orte (German)
AAO American Association of Otolaryngology
AAO Amino Acid Oxidase
AAO AUTOVON Assistance Operator
AAP Acquisition and inoculation Access Period
AAP Affirmative Action Plan
AAP Aircraft Assembly Plant
AAP Allied Administrative Publication
AAP American Academy of Pediatrics
AAP American Academy of Psychiatrists
AAP Analog Automatic-Pilot
AAP Apollo Application Program (duplicates?)
AAP Apollo Application Project (duplicates?)
AAP Approach Astrophysics Payload
AAP Association for Astrological Psychology
AAP Association of Academic Physiatrists
AAP Atmospheric Analysis and Prediction
AAP Average Annual Precipitation
AAR Acupuncture Association and Register Ltd.
AAR Against All Risks
AAR Aid for Afghan Refugees
AAR Alternate Acquisition RADAR
AAR American Association of Railroads (duplicates?)
AAR Amino-Acid Requirement
AAR Antigen-Antiglobulin Reaction
AAR Association of American Railroads (duplicates?)
AAR Association of American Rhodes Scholars
AAS Access Authority System
AAS Adjusted Air-Speed
AAS Advanced Air Station
AAS Agency for Air Safety
AAS Agnostics' Adoption Society
AAS Alexander and Alexander Services
AAS American Antiquarian of Society (not duplicates)
AAS American Antiquarian of Society. Proceedings (not duplicates)
AAS American Association of Shotgunning
AAS Annual Automated Controls Survey
AAS Annual Average Score
AAS Army Aerospace Standards (military)
AAS Asian and African Section
AAS Aspirator Air System
AAS Atlantic Aviation Service (company)
AAS Atlanto-Axial Subluxation
AAS Automatically-Adjustable Shock absorber
AAT Accelerated Apprenticeship Training
AAT Acute Abdominal Tympani
AAT Ambassadair Air Travel Club
AAT American Academy of Thermology
AAT APACHE Action Team
AAT Art and Architecture Thesaurus (publication)
AAT Attitude Acquisition Technique
AAT Average Access Time
AAU Acoustic Add-on Unit
AAU Angular Accelerometer Unit
AAU Audio Accessory Unit
AAV Acceptance And Verification
AAV Assault Amphibian Vehicle
AAV Assessed Annual Value
AAW Advanced Autonomous Weapons (military)
AAW American Academy of Wine
AAW Anti-Air Weapon (military)
ABA Aaron Burr Association
ABA Acrylonitrile-Butadiene-Acrylate (chemical; plastic)
ABA Allergic Broncho-Pullmonary Aspergillosis
ABA American Bankers' Association
ABA American Bar Association
ABA American Billiard Association
ABA American Brazilian Association
ABA American Buffalo Association
ABA Amino-Butyric Acid (chemical)
ABA Arab Bankers' Association
ABA Archives of the Canadian Rockies, Banff, Alberta
ABA Australian Bicentennial Authority
ABA Azo-Benzene-Arsonate (chemical)
ABB Albright-Butler-Bloomberg (syndrome)
ABB Automatic Back Bias
ABB the Akron and Barberton Belt Railroad Co.
ABC Accent Before Cooking
ABC Act for Better Child-care services
ABC Activity-Based Cost (not duplicates)
ABC Advance Booking Charter
ABC Advanced Ballistics Concepts
ABC Agricultural Business and Commerce
ABC Air Balance Council
ABC Air-Borne Control
ABC Alberta Blue Cross
ABC All Boards Clear
ABC Alternate Birthing Center
ABC American and British Commonwealth Association
ABC American Blade Collection
ABC American Book Co.
ABC American Botanical Council
ABC American, British, and Canadian
ABC American-Born Chinese
ABC Anchor Bible Commentary
ABC Any Boy Can
ABC Approaches to Behavior Change Inventory
ABC Asphaltenic Bottom Cracking
ABC Assessment Biological and Chemical
ABC Association of Bituminous Contractors
ABC Association of Black Catholics against abortion
ABC Atanasoff-Berry Computer
ABC Automatation of Bibliography through Computerization
ABC Automatic Backlight Control
ABC Automatic Bill Calling
ABC Automatic Block Controller
ABC Auxiliary Breaker, normally Closed
ABE Acute Bacterial Endocarditis
ABE Adult Basic Education (see BAE)
ABF Anti Back-Flow
ABF Application By Forms
ABL Above Base-Line
ABM Anti-Ballistic Missile (not duplicates; military)
ABM Army Ballistic Missile (not duplicates; military)
ABN Australian Bibliographic Network
ABO Air Base Operability
ABP Architectural Building Products (company)
ABS Acrylonitrile Butadiene Styrene (chemical; plastic)
ABS Address-Book Synchronization
ABS Approach Beacon System (aircraft)
ABT Aviation Boatswain's Mate, Third Class
ACA Advanced Combat Analysis
ACA Advisory, Conciliation, Arbitration
ACA American Capital Aviation Corp.
ACA Automated Calibration Analysis
ACA Automatic Circuit Assurance
ACB American Council of the Blind
ACC Airborne Communications Center
ACC American Consultive Committee
ACC Area Control Code
ACC Argonne Code Center
ACC Automatic Congestion Control (telephony)
ACD Air Circulation Device
ACE Access Control Entry
ACE Active Change Events
ACE Adverse Channel Enhancements
ACE Alerting Cockpit Equipment (aircraft)
ACE Army Corps of Engineers (military; also ACOE)
ACE Attribute Coaching and Enhancement
ACE Automatic Computing Engine
ACF Access Control Facility
ACG Address Coding Guides
ACG Aviones Comerials de Guatemala (Guatemalan)
ACH Adrenal Corticotropic Hormone
ACI Advance Controls, Inc.
ACI Air Charter International (company)
ACI Analytical Condition Inspection
ACK Amsterdam Compiler Kit (commercial)
ACL Actual Cost of Labor
ACL American Civil Liberties
ACM Actuation Control Module
ACM Advanced Cluster Munitions (military)
ACM Air-Cycle Machine
ACM Airplane Condition Monitoring
ACM Automated Census Mapping
ACN Approval and Clearance Notice
ACN Area-Code, Number
ACO Airborne Control Office (not duplicates)
ACO Airborne Control Officer (not duplicates)
ACO Animal Control Office (not duplicates)
ACP Active Control Point
ACP American Common Pistol
ACP Annunciation Control Panel
ACP Army Chart Service (military)
ACP Army Command Post (military)
ACP Azimuth Count Pulse
ACR Airlift Concepts and Requirements
ACR Approach Control RADAR (aircraft)
ACR Assured Crew Return (same thing; not duplicates)
ACR Astronaut Crew Rescue (same thing; not duplicates)
ACS A Campbell Smith, Industries (company)
ACS Actuator Control System (not duplicates)
ACS Advanced Continuous Simulation
ACS Aircraft Control and Surveillance
ACS Airplane Configuration and Status
ACS Archiving and Communication System
ACS Arctic Climate System
ACS Association for Canadian Studies
ACS Automated Computer Security
ACS Automatic Class Selection
ACT Adreno-Cortico-Tropic (chemical; hormone)
ACT Air Control Team
ACT Air-Charge Temperature
ACT American Compact Technology (company)
ACU Air Conditioning Unit
ACU Avionics Computer Unit
ACV Alarm Check Valve
ACW Alternating Continuous Waves
ACW Anti-Clock-Wise (UK)
ADA Airborne Data-Acquisition
ADA Analog to Digital to Analog
ADA ATLAS Daily Activity
ADA Audio Design Associates
ADA Automa Design Associates (company)
ADB Aircraft Data-Base
ADC Advanced Digital Converter
ADC Air-Development Center
ADC Airborne Digital Computer
ADC Angle-to-Digital Converter
ADD Advance Distribution and Drawing
ADD Automated Documentation Development
ADD Automatic Data Distribution
ADE Air Data Element
ADE ASIC Design Environment
ADF Application Development Facility
ADH Attention Deficit Hyperactivity
adi American Dry Ice Corp. ([non]capitalization by creator)
ADI Analog Device Interface
ADL Activities of Daily Living
ADL Applicable Document List
ADL Arthur D. Little Inc.
ADM Adaptive Differential Modulation (not duplicates)
ADM Advanced Development Model
ADM Application Database Manager
ADO Active-X Data Objects (duplicates?)
ADO Advanced Development Objective
ADP Administrative Data-Processing
ADP Analog Data Processor
ADP Automated Data-Processing (not duplicates)
ADR Aerial Data Reduction Associates Inc.
ADR Alternative Dispute-Resolution
ADR Automatic Data Recovery
ADS Advanced Display System
ADS Airborne Data System
ADS Analog Data System
ADS Analog Display Services
ADS Astrophysics Data System (NASA)
ADS Audio Data Sheet
ADS Automated Document Storage
ADT Advanced Development Test
ADT Air Data Test
ADT Atlantic Daylight Time
ADU Alphanumeric Display Unit
ADU Auxiliary Display Unit
ADX ATM Data eXchange interface (ATM; 'X' for 'exchange')
AEA Advanced Equipment Authorization
AEA Atomic Energy Authority
AEC Allstate Elevator Co.
AEC Aluminum Electrolytic Capacitor
AED Account Engineering Dealer
AED Alphanumeric Entry Device
AED Australian Education Council (Australian)
AEG Active Element Group
AEG Associated Environmental Group, LLC
AEI All Engines In-operative (joke - hopefully!; aircraft)
AEL American Electronic Laboratories, Inc.
AEM Ancillary Equipment Module
AEM Audio Entertainment Multiplexer
AEP Audio Entertainment Player
AER Approach End Runway
AES Aerodrome Emergency Services
AES Apollo Extension System
AES Architectural Engineering Services
AES Atomic Electronic System (not duplicates)
AES Auger Electron Spectroscopy
AEU Auxiliary Electronics Unit
AFA Air Force Acquisition (military)
AFA Air-Force Armament (military)
AFA American Foundrymens' Association
AFA Audio-Frequency Amplifier
AFA Automatic Force Adjustment
AFC Air-Force Component (military)
AFC Arsenal Football Club
AFC Atlantic Fishery Commission
AFD Air-Force Depot (military)
AFD Assistant Flight Director
AFE Advanced Front-End
AFF Air-Force Forces (military)
AFG Audio-Frequency Gain
AFI Air-Force Institute (US; military)
AFL Above Field Level
AFL Active Filter Library (commercial)
AFL Army Flight Laboratory (military)
AFM Air-Force Missile (military)
AFM Aircraft Flight Manual (not duplicates)
AFM Audio Frequency Modulation
AFO Army Field Operation (not duplicates; military)
AFO Army Field Operations (not duplicates; military)
AFP Air-Force Pentagon
AFR Air-Force Regulation (military)
AFS Adult and Family Services
AFS Advanced Framing Systems
AFS Air-Force Supply (military)
AFS Arming and Fusing System
AFS Avionics Flight Software
AFT American Federation of Teachers
AFT Anti-Friction Treatment
AFV American Family Values
AGA American Gas Association
AGB Accessory Gear-Box (not duplicates)
AGC Automatic Gain-control
AGD Altitude Gate Disable
AGE Air-Force Ground Equipment (not duplicates; military)
AGI The Alan Guttmacher Institute
AGM Absorbent Glass Mat (plumbum-sulfur battery)
AGP A Grievous Process (contrived; lame)
AGS Aerodynamic Geometry System
AGS African Geological Survey
AGS Applicon Graphics System
AGT Automated Guide-way Technology
AGU American Geophysical Union
AHA Adaptec Host Adapter (commercial)
AHC Advanced High-speed CMOS
AHC American Hebrew Congregation
AHG Anti-Hemophilic Globulin
AHI Affordable Health Insurance
AHP Analytical Hierarchy Process (duplicates?)
AHS Active-High Signal
AHS Alaska-Hawaii Standard
AIA Aerospace Industries Association (not duplicates)
AIA African Information Agency
AIA Apiary Inspectors of America
AIC Ada Information Clearinghouse (also AdaIC)
AIC Aerodynamic Influence Coefficient
AIC Artificial-Intelligence Center
AID Against Internet Defamation
AID American Institute of Decorators
AID Automated Interactive Design
AIE Ada Integrated Environment
AIF Amiga Image-File
AIG Asociacin Internacional de Geodesia (language?)
AIL Airborne Instrument Laboratory
AIL Airborne Instrument Landing and approach (aircraft) *
AIM Advanced Inertial Measurement
AIM Air Intercept Missile (military)
AIM Amplitude Inter-Modulation
AIN Administrative Information Service
AIO Audio Input-Output
AIP Application Interface Protocol
AIR Advanced Interagency Research
AIR Aerospace Information Reports
AIR Atmospheric Infrared Sounder (also AIRS)
AIS Airborne Instrumentation System
AIS Army Inspection and Safety (military)
AIS Array of Independent Systems (not duplicates)
AIS Aviation Information Services
AIT Automatic Information Test
AIU Analog Input Unit
AIU Audio Input Unit
AIV Accumulator Isolation-Valve
AJ1 Anti-Jam number One (military)
AKA A-K Aviation (company?)
AL1 Adaptation Layer One (ATM)
ALA American Latvian Association
ALA Austral Lineas Aereas (company?; language?)
ALB Anti-Lock braking
ALC Assisted-Living Community
ALD Alternate Load Distributor
ALD Automatic Let-Down
ALF Adaptive Lattice Filter
ALF Aircraft Load Factor
ALI American Longshoremens' International
ALL Airborne Laser Laboratory
ALO Automatic Lock-On
ALP Advanced Logic Products
ALR Advanced Logic Research, Inc.
ALS Advanced Light-Source
ALS Autograph Letter, Signed
ALT Automatic Line Test (telephony)
ALU Analog Logic Unit
ALV Air-Launched Vehicle
ALZ Assault Landing Zone (aircraft)
AMA American Marketing Association
AMA Association for Model Aviation
AMB Arthur Mitchell Branham (company)
AMC Air Material Command (not duplicates)
AMC Air Materiel Command (not duplicates; military)
AMC American Medical Colleges
AMC Automatic Mixture Control
AMD Advanced Musical Disintegration
AMD Air-Movement Device (typically a fan!)
AME African Methodist Episcopal
AME Aviation Medical Examiner
AMF Avionics Maintenance Facility
AMG Australian Map Grid
AMI American Megatrends Inc.
AMM Advanced Missile Model (military)
AMN American Mobile Nurses
AMO Advanced Material Orders (not duplicates)
AMO Advanced Materiel Orders (not duplicates)
AMP Air Movement Plan
AMP Army Military Personnel (military)
AMR Automated Materials Review
AMR Automated Meter-Reading (commercial)
AMR Autonomous Mobile Robot
AMS Advance Material Summary (not duplicates)
AMS Analysis and Monitoring System
AMS Automated Master Schedule
AMS Avionics Maintenance Squadron
AMS Avionics Mission Simulator
AMT Associate in Mechanical Technology (degree)
AMU Analog Memory Unit
AMW America's Most Wanted (television)
AMX American Motors eXperimental (contrived or unknown; 'X' for 'experimental')
ANA All Nippon Airways (company)
ANA Army, Navy, Air-Force (military)
ANC All-Number Calling (telephony)
AND Air-Force-Navy Design (not duplicates; military)
AND Alpha-Numeric Display
ANE Atlantic North-East
ANK Alpha-Numeric Keyboard (not duplicates)
ANN Analog Neural Network
ANS American National Standard
ANS American Nuclear Society
ANS Autonomic Nervous System
ANY Air New York
AOA Angle Of Attack
AOC Advanced Offshore Concepts
AOC Air-to-Oil Cooler
AOC Airline Operational Control
AOC Assemblee Oceanographique Commune (language?)
AOD Auxiliary Output Device
AOI And-Or-Invert (logic)
AOI Assholes Of the Internet (also AOTI)
AOL Absent Over Leave (military)
AOL Algorithmic-Oriented Language
AOP Airborne Operational Platform
AOQ Assurance Of Quality
AOS Acousto-Optic Spectrometer
AOS Airborne Optical Surveillance
AOS Airlift Operations School
AOT Average Operating Time (not duplicates)
APA Aerial-Phenomenon Agency
APA American Plywood Association
APA American Psychiatric Association
APA Antenna Processor Assembly
APB Acid-Proof Bench-top
APC Allen Products Company
APC Applied Personal Computer
APC Aspirin, Phenacetin, Caffeine
APD Academy for Planning and Development
APE Analog Processing Element
APF Acid-Proof Floor
APF Asia-Pacific Fellowship
APG Aberdeen Proving Ground
API Armor-Piercing Incendiary
APL Acute Promyelocytic Leukemia
APL Assembly Page Listers
APL Automatic Phase Lock
APM Advance Performance Materials
APN Analog Private Network
APP Associated Petroleum Products, Inc.
APR Auburn Parks and Recreation (Washington)
APR Automatic Performance Reserve
APS Accident Prevention Strategies
APS American Philatelic Society
APS Applied Physics Staff
APS Automated Publishing System
APS Automatic Power-Switching
APS Auxiliary Power-Source (not duplicates)
APS Auxiliary Power-Supply (not duplicates)
APS Auxiliary Power-System (not duplicates)
APT Advanced Passenger Train
APU Activate Physical Unit (not duplicates)
APU Auxiliary Power-Unit
APW Anti-Personnel Weapon (military)
AQC Airline Qualification Course
AQS Advanced Quality System
ARA Amateur Racquetball Association
ARA American Racquetball Association
ARA Arctic Resource Aircraft
ARB Adapter ROM BIOS
ARC Acoustic Research Center (DARPA)
ARC Air Refueling Control
ARC Air Research Corp.
ARC Ames Research Center (NASA)
ARC Anti-virus Research Center
ARC Atlantic Research Corporation
ARD Acute Respiratory-Disease
ARD Aeronautical Research and Development (not duplicates)
ARD Automatic Recovery Device
ARD Auxiliary Readout Display
ARF Australian Recognition Framework (Australian)
ARI Arensdorf Trucking, Inc.
ARJ Advanced Radar Jammer
ARL Akademie fur Raumforschung und Landesplanung (German)
ARL Alliance of Research Libraries
ARM Aircraft Recovery Manual
ARN Aerial Refueling Nozzle
ARN Air Request Net
ARO Army Research Office (military)
ARO Austin Repeater Organization
ARP Airborne Recording Program
ARP Automatic-pilot Replacement Program
ARP Azimuth Reference Pulse
ARS Agricultural Research Service, U.S. Department of Agriculture
ARS Air Revitalization System
ARS Amateur Radio Society
ARS Atmospheric Radiation Study
ARS Automatic Route Selection
ART Adams and Rountree Technology, Inc.
ART Audio Reconstruction Technology
ART Automated Reasoning Tool
AS3 Aviation Services and Suppliers Super-Show ('S3' [S cubed] for 'SSS')
ASA American School Administrators
ASA American Statistical Association
ASA Australian Science Archives
ASA Auto-land Status Annunciation (not duplicates)
ASA Auto-land Status Annunciator (not duplicates)
ASC Accredited Standards Committee
ASC Agnes Scott College
ASC American Satellite Corporation
ASC Aural Synthesizer Card
ASC Automatic Sensitivity Control
ASC Automotive Specialty Company
ASD Aero-Space Division
ASD Aircraft Situation Display
ASD Automation Systems Department (SCG; now PAC)
ASE Airborne Support Equipment
ASE Assembly Support Equipment
ASF Advanced Streaming Format
ASG Aeronautical Systems Group
ASI Agenzia Spaziale Italiano (Italian)
ASI Asplund Supply Inc.
ASI Asynchronous SCSI Interface
ASI Aviation Safety Institute
ASL Applied Scentific Laboratories (company?)
ASL Association of School Libraries
ASM Air-to-Surface Missile (military)
ASM American Society of Metals
ASM Automatic-throttle Servo Motor
ASO Air Surveillance Operator
ASO Auxiliary Switch, normally Open
ASP Advanced SCSI Programming
ASP Advanced Signal Processor (not duplicates)
ASP Appletalk Session Protocol (commercial)
ASP Audio Select Panel
ASP Automatic Spooling Priority
ASR Address Space Register
ASR Airborne Surveillance RADAR (not duplicates)
ASR Automated Speech Recognition
ASS Air-Scrubber System
AST Advanced Supersonic Technology
AST Ah, Samsung Technology (contrived)
AST Anti-Static Treatment
AST Archive Storage Technology
AST Avionics System Test
ASV American Standard Version (bible)
ASW Anti-Submarine Warfare (military)
ATA Advanced Transfer Adapter (not duplicates)
ATA Advanced-Technology Attachment
ATA Antenna Train Angle (not duplicates)
ATA Aviation Trades Association
ATB Advanced-Technology Bomber ('stealth')
ATB Always To Blame
ATC Air Training Command
ATC Atlantic Test Center
ATC Automatic Tool Changer (see ATE, ATX)
ATC Avionics Team Communication
ATD Actual Time of Departure
ATD Aircrew Training Device
ATE Army Test and Evaluation (military)
ATE Automatic Tool Exchanger (see ATC, ATX)
ATF Advanced Technical Fellow
ATG Air-To-Ground
ATI American Transport Inc.
ATi Audio Teknology Inc. (not duplicates; both are used; [non]capitalization by creator)
ATI Audio Teknology Incorporated (not duplicates; both are used)
ATI Automatic Transfer Instruction
ATK Available Ton-Kilometer
ATL Association of Trial Lawyers
ATM Asynchronous Transport Mode (not duplicates; incorrect; common miscontrivance)
ATM Atmosphere Transfer Maneuver
ATN Advance Tubing Notice
ATO Along Track Offset
ATO Automatic Teaching Operations
ATO Automatic-Transmission Over-haul (not duplicates)
ATO Automatic-Transmission Over-hauler (not duplicates)
ATP Admissions Testing Program
ATP Advanced Technology Program (Department of Commerce)
ATP Assembly and Test Pit
ATR Air Traffic plans and Requirements
ATR Air Transportability Requirement
ATR Anti-Transmit-Receive
ATR Apollo Test Requirements
ATR Automatic Tests Release
ATS Advanced-Technology Satellite
ATS Air-Traffic Service (FAA NAS; not duplicates)
ATS Air-Traffic System (not duplicates)
ATS Airborne Tracking System
ATS Aircraft Training System
ATS Anderson Trucking Service, Inc.
ATS Automated Air-Traffic
ATS Auxiliary Territorial Service
ATS Aviation Technical Support
ATT Apply Trim Template
ATV Amateur Tele-Vision
ATZ Airport Traffic Zone
AUA Auburn University, Auburn (Washington)
AUK Air United Kingdom
AUS American Urological Society
AUW Anti-Underwater Warfare (military)
AVA Abandoned-Vehicle Auction
AVD Accounting Valuation Difference
AVI Air Vehicle Instrumentation
AVL Air Vehicle Limit
AVM Apparent Visual-Magnitude
AVR Abandoned-Vehicle Report
AVT Advanced Vehicle Technology (not duplicates)
AWA Airflow Work Authorization
AWA Australian Workplace Agreements (Australian)
AWA AWACS Work Authorization (military)
AWC Association for Women in Computing
AWG All Work Guaranteed
AWL Altered Wire List
AWL Amber Warning-Lamp
AWL Are We Lost?
AWP Airborne Weather Platform
AWS Air Warning System
AWS Aural Warning Speaker
AWT Automatic Wire Test
AWT Average Weekly Traffic
AXB Airborne eXpendable Bathythermograph ('X' for 'expendable')
AYF All Your Fault
B1S Beaded One Side
B2S Bright Two Sides
B3E Balancing the Budget on the Backs of the Elderly ('B3' [B cubed] for 'BBB')
BAA Bachelor of Arts and Architecture
BAA Board of Assistance Appeals
BAA British Accounting Association
BAA British Archaeological Association
BAA Broad Agency Announcement
BAA Business Area Architecture
BAC Bi-Axial Cable
BAC British Aircraft Corporation
BAC Budget At Completion
BAC Burma Airways Corp.
BAE Bachelor of Agricultural Engineering (degree)
BAE Basic Adult Education (degree; see ABE)
BAE Bundle Associated Equipment
BAI Boeing Aero-systems International (commercial; not duplicates)
BAI Boeing Aero-systems International, Incorporated (not duplicates)
BAI Business And Institutional
BAL Basic Assembly Language
BAN Buyer Action Notice
BAQ Bachelor Airmen Quarters (military)
BAR Battery Acquisition RADAR
BAR Beyond All Recognition
BAS Bloodstock Air Services (company)
BAT Block Address Translation
BBB Better Business Bureau
BBB Body-Bound Bolts
BBC Belfast Boat Club
BBD Bomb Bay Door (military)
BBP Base-Band Processor
BBS Be Back Soon
BBS Station Biologique des Bermudes *
BBT Basal Body Temperature
BC3 Beverage Container Control Coalition ('C3' [C cubed] for 'CCC')
BCC Bar-Code Capable
BCC Broadcast Control Channel (also BCCh [GSM])
BCC Byzantine Catholic Church
BCD Bad-Conduct Discharge
BCD Building Codes Division
BCH Base-Chaudhuri-Hocquengham *
BCL Bachelor of Civil Law (degree)
BCM Bachelor of Church Music (degree)
BCM Body Computer Module (not duplicates)
BCO Bathymetric Chart of the Oceans
BCP Byte Control Protocol
BCR Byte-Count Register (register)
BCS Bachelor of Commercial Science (degree)
BCS Boeing Company Standard (commercial)
BCT Bakery, Confection, and Tobacco
BCU Bus Coupler Unit
BCW Before-Class Work
BCW Blue-Collar Worker
BDB Boeing Design/ Build (commercial)
BDD Business Development Directives
BDF Bitmap Description Format (not duplicates)
BDF Business Design Facility
BDI Bombardier Data Indicator
BDP BIU Development Processor (commercial?)
BDS Boeing Advanced Systems (commercial)
BDS Business Development Service
BDU Battle Dress Uniform (military)
BEC Bid Estimate Comparison
BEI Baldwin Electronic Industries
BEL Bundle Effectivity List
BEM Boeing Enterprise Modeler (commercial)
BEP Bachelor of Engineering Physics (degree)
BES Basic Education Studies
BFA Bachelor of Fine Arts (degree)
BFD Big Fat Deal (not duplicates)
BFD Big Freaking Deal (not duplicates)
BFD Big Friendly Deal (not duplicates)
BFD Big Frigging Deal (not duplicates)
BFD Big Fucking Deal (not duplicates)
BFD Boeing Fire Department
BFD Book-Form Drawing
BFE Bye For Ever
BFL Buffered FET Logic
BFR Blip Frame Ratio
BFS Boating, Fishing, and Swimming
BFT Bachelor of Foreign Trade (degree)
BGE Branch if Greater or Equal (instruction)
BGP Branching Glucose Polymer
BHF British Heart Foundation
BHI Better-Hearing Institute
BHI Beverly Hills Internet (commercial?)
BHR Behavioral Health Resources (company; not duplicates)
BIA Bus Interface Adapter
BID Business Improvement District
BIE Bachelor of Industrial Engineering (degree)
BIE Business and Institutional Equipment
BIL Band Interleaved by Line
BIM Bus Interface Module
BIS Boundary Intermediate System (ISO-OSI IDRP)
BIS Business Information System (not duplicates)
BIS Buyer Information Service
BIT Behavioral Intervention Team
BJC Bubble-Jet Color (commercial)
BLD Balanced Line Driver
BLE Battery Life Extender (commercial)
BLE Branch if Less or Equal (instruction)
BLI Bachelor of Literary Interpretation (degree)
BLP Blind Load and Plug
BLT Blind Load and Tracer
BLT Buried Load Transistor
BLT Buried-Load Transistor
BMA Ballistic Missile Agency (military)
BME Bachelor of Mechanical Engineering (degree)
BMI Body-Mass Index (medicine)
BML Boeing Metrology Laboratory (commercial)
BMM Borrowed Military Manpower (military)
BMP Bill-of-Materials Processor
BMS Basic Mapping Support
BMT Beam-Management Terminal
BMT Bone-Marrow Transplant
BMT Brooklyn/ Manhattan Transit (commercial; not duplicates)
BMT Brooklyn/ Manhattan Transit @ (the original; not duplicates)
BMV Brake Metering Valve
BNA Branch if Not Above (instruction)
BNC Bombing Navigational Computer (military)
BNF British National Formulary (publication)
BNL Branch if Not Less (instruction)
BNR Bell-Northern Research (commercial; telephony)
BOA Basic Ordering Agreement
BOA Break-Off Altitude (aircraft)
BOA Break-Off Altitude
BOB Black-On-Black (fiction; not duplicates)
BOC Blue Oyster Cult (music)
BOC But Of Course
BOD Beginning Of Data
BOD Beginning Of Day
BOD Bottom Of Deck (architectural)
BOE Boletin Oficial del Estado (Spanish)
BOL Bearing Only Launch
BOM Beginning Of Message
BOP Bit-Oriented Protocol
BOS Bearing and Oil Seals
BOT Beginning Of Tape
BOV Beginning Of Volume
BPA Bachelor of Professional Arts (degree)
BPB Burns Point Beach (real-estate)
BPD Bureau of the Public Debt (US)
BPD Buy Per Drawing
BPE Business Process Engineering
BPI Bi-directional Parallel Interface
BPM Barrels Per Minute
BPM Bushels Per Minute
BPO Boston Pops Orchestra
BPR By-Pass Ratio
BPS Bytes Per Second
BPW Barrels Per Week
BPY Barrels Per Year
BRC Biblical Research Center (commercial?)
BRE Business Research Environment
BRI Basic-Rate Interface (telephony; ISDN; not duplicates)
BRI Basic-Rate ISDN (telephony; not duplicates)
BRI Bearing Range Indicator
BRM Basic Remote Module
BRP Brake Release Points
BRU Bomb Rack Unit (military)
BS1 BASIC Stamp One (commercial)
BS2 BASIC Stamp Two (commercial)
BSA Bovine Serum Albumin (reagent in molecular biology)
BSC Boro-Silicate Crown (dental)
BSD Board on Sustainable Development
BSD Business System Design
BSE Bachelor of Science in Education (degree)
BSE Bit System Errors
BSG Battery Sales Group
BSL Bachelor of Science in Linguistics (degree)
BSL Basic Systems List
BSL Building Setback Line
BSM Battery Storage Mode (commercial)
BSP Business Systems Planning
BSR Bit-Scan, Reverse (instruction)
BSS Baltic Sea States
BSS Battlefield Shock Syndrome (not duplicates)
BSS Battlefield Stress Syndrome (not duplicates)
BSS Beauty-Shop Supplies
BST Basic Services Terminal
BTA Basic Telecommunications Access
BTB Business-To-Business
BTC Banded Two Sides
BTE Bachelor of Textile Engineering (degree)
BTL Backplane Transistor Logic
BTN Boeing Telephone Network (commercial; telephony)
BTO Bachman-Turner Overdrive (music)
BTO Build-To-Order (not duplicates)
BTO Built-To-Order (not duplicates)
BTR Bit-Test and Reset (instruction)
BTS Battery-Temperature Sensor
BTS Build To Suit
BTS Burster/ Trimmer/ Stacker
BTT British Theatre Technicians
BTW Back To Work
BUS Broadcast and Unknown Server
BVC Boeing Vertol Company
BVD Bradley, Voorhies, and Day (company)
BWA Braided Wire Armor
BWC Boeing Wichita Company
BWM Broadcast Warning Message
BWP Barrier, Water-Proof
BWT Band-Width Test
C2C Center-To-Center ('2' for 'to')
C4N Ciao for Now (Italian? '4' for 'for')
CAA Calibrate And Align
CAA Canadian Acoustical Association
CAA Canadian Automobile Association
CAA Carotid Audio-frequency Analysis
CAA Center for American Archeology
CAA Civil Aeronautics Administration (US)
CAA Civil Aeronautics Administration
CAA Collectors of American Art
CAA Colombian American Association
CAB Central American Bank
CAB Corrective Action Board
CAC Capability And Capacity
CAC Caution Advisory
CAC Circuit Administration Center
CAC Community Action Council
CAD Civil Aviation Directorate
CAD Computer-Aided Design
CAD Computer-Aided Dialing
CAD Computer-Aided Dispatch
CAD Courantomtre Acoustique Doppler (language?)
CAE Commercial Avionics Engineering
CAF Canadian Advertising Foundation
CAF Canadian Air-Force (military)
CAF Chinese Air-Force (military)
CAG Column-Address Generator
CAI Communication And Identification
CAJ Canadian Association of Journalists
CAJ Computer Applications Journal (publication)
CAM Channel Adapter Manager
CAM Computer-Aided Manufacturing
CAN Controller Action Notice
CAN Controller-Area Network
CAP Carrier-less Amplitude-modulation and Phase-modulation
CAP Common Acoustic Processing
CAP Configuration Audit Plan
CAP Consumer Action Project
CAP Contract Authorized Proposal
CAR Central-African Republic
CAR Configuration Audit Report
CAS Certificate of Advanced Studies
CAS Certified Automotive Service
CAS Commercial Avionics Systems
CAS Cost And Schedules
CAT Circuit-Array Technology
CAT Cockpit Automation Technology
CAT Computer-Aided Tomograph (not duplicates)
CAT Craft Access Terminal
CAW Custom Alloy Wheel
CAX Community Automatic eXchange ('X' for 'exchange'; telephony)
CBA Component Board Assembly
CBC Computer-Bank Charity
CBE Computerized Branch Exchange
CBE Council of Biology Editors
CBL Circuit Breaker List
CBN Christian Broadcasting Network
CBR Constant Bit-Rate
CBR Consultant Bureau for Reconstruction
CBS Computer Business System
CBT Core-Based Tree (multi-cast routing)
CBW Convert Byte to Word
CCA Carbonaceous-Chondritic Asteroid
CCA Cinema Advertising Association
CCA Civil Air Attache *
CCA Courant Circumpolaire Arctique (language?)
CCA Critical-Care Administration (not duplicates)
CCB Command Control Block
CCC Cascade Container-fab Company
CCC Classic Coca-Cola (commercial)
CCC Color-Code Chart
CCC Combustion-Control Computer (automotive fuel-injection)
CCC Community Crusade for Children
CCC Configuration Control Committee
CCD Charge-Coupled Device
CCD CITS Controls and Displays
CCD Computer-Controlled Display
CCE Cycle-Counter interrupt Enable
CCH Connections per Circuit per Hour
CCI Common Client Interface
CCI Creative Colors International (company)
CCK Computers by Constantin Kyriazopoulos (commercial)
CCL Console Command Language
CCM Collectors' Choice Music (commercial)
CCM Customer Configuration Memorandum
CCN Command and Control Network
CCO Community Corrections Officer
CCP Climate Control Panel
CCP Consolidated Cryptologic Program
CCP Critical Control Point
CCR Client Service Representative
CCR Consumer Support Representative
CCR Control Contactor
CCS Central Computing Software
CCS Classified Control Station
CCS Color Calibration System @ (other; not duplicates)
CCS Common Command Set (SCSI)
CCS Communication Control System (not duplicates)
CCS Contamination Control System
CCS Control-Center System
CCT Central Control Terminal
CCU COLT Computer Unit (commercial?)
CCV Critics' Choice Video (commercial)
CCW Counter Clock-Wise
CDA Call-Disposition Analyzer
CDA Control and Data Acquisition
CDA Converter, Digital to Analog
CDB Coordinate Data Base
CDC CDROM-Drive Controller (not duplicates)
CDC CITS Dedicated Computer
CDC Control Data Corporation
CDD Customer-Designated Data (not duplicates)
CDD Customer-Designed Data (not duplicates)
CDE Complex Data Entry
CDF Combined Distribution Frame
CDF Common Data Format
CDI Central Dispatch Inc.
CDI Compact-Disc Interactive
CDI Compact-Disk Image
CDI Customer Data Identifier
CDL Commercial Driver's License
CDM Civil Defense and Mobilization
CDO Carrier District Office
CDO Community Dial Office
CDP Communications Data Processor
CDP Compact-Disc Player
CDR Compact-Disc Re-writable (over-use of 'R'/ 'CDR'?)
CDR Current Directional Relay
CDS Central Data System
CDS Commercial Data Services
CDS Commitment Development System
CDS Controls and Displays Subsystem
CDT Command Destruct Transmitter
CDU Control/ Display Unit
CDV Comma-Delimited Value
CDX Control Differential Transmitter ('X' for 'transmitter')
CEA Council of Economic Advisors
CEB Conditional End Bracket
CEC Cunningham Electric Company
CEE Central and Eastern Europe
CEI Conducted Electromagnetic Interference
CEM Communications-Electronics-Meteorological CEM Change Estimate Memorandum
CEM Consumer-Electronics Manufacturer
CER Campagnie Europeenne de Recherches (language?)
CES Computer Engineering Student
CET Combustor Exit Temperature
CET Communications-Electronics Terminology
CET Computer-Engineering Technician
CFA Combination Fabrication and Assembly
CFC Chloro-Fluoro-Carbon (chemical)
CFD Computational Fluid Dynamics
CFD Contractor Functional Demonstration
CFG Communications Functional Group
CFI Computer Forensics Inc.
CFM Continuous Flow Manufacturing
CFM Cross-Functional Management
CFP Contractor-Furnished Parts
CFS Center Frequency Stabilization
CFS Cubic Foot per Second
CFT Carlos' Forms Tutorial (not duplicates; other)
CGA Computer Graphics Association
CGE Computer-Generated Environment
CGM Computer Graphics Metafile (computer file extension; not duplicates)
CGM Computer Graphics Metafile @ (other; not duplicates)
CGS Computer Graphics System
CHC Community Health Center
CHF Coronary Heart Failure
CHI Computer-Human Interface
CHI County Health Inspector (not duplicates)
CHR Common Hardware Reference
CIA Calibration Interval Analysis
CIC Combat Information Center
CIC Commander In Chief
CIC Crime Information Center
CID Customer Information Department
CIE Crop Inventory Experiment
CIF Common Interchange Format
CIF Cost, Insurance, and Freight
CII Configuration Identification Index
CIM Compu-Serve Information Manager (commercial)
CIO Copy In and Out
CIP Cast In Place (architectural)
CIP Cast-Iron pipe
CIP Common Indexing Protocol
CIR Color Infra-Red
CIS Card Information Structure
CIS Command Information System
CIS Commercial Internet Service
CIS Computer Information System (not duplicates)
CIT California Institute of Technology
CJA Compare, Jump if Above (instruction)
CJH Christian Junior-High
CJL Command Job Language
CJS Criminal Justice Sciences
CLA Christian Liberty Academy
CLC Christian Life Classics (publication)
CLD Chronic Liver-Disease
CLI Call-Level Interface
CLI Command-Line Interface
CLP Command Language Processor
CLS Cartridge Loading Systems
CLT Custom Landscape Tandem (trailer; commercial)
CLU Chartered Life Underwriter
CLV Commercial Launch Vehicle
CMA Computer Manufacturers' Association
CMC Central Maintenance Computer
CMC Communication Management Configuration
CMC Computer Management Center (not duplicates)
CMC Computer-Mediated Communication
CMC Contract Maintenance Center (not duplicates)
CMD Contract Management District
CME Committee on the Marine Environment
CME Corporate Marketing Empire
CMF Creative Music Format
CMI C-Media Inc.
CML Chicago Miniature Lamp (company)
CMM Centro Meteorolgico Mundial (language?)
CMM Computerized Maintenance Management
CMO Configuration Management Office
CMO Configuration Management Officer
CMR Certification Maintenance Requirements
CMS Cold-Milled Steel
CMS Correspondence Management System
CMS Cost Management System
CMU Cabin Management Unit
CNA Certified NetWare Administrator (commercial)
CNC Containers Northwest Corporation
CNE Certified NetWare Engineer (not duplicates; commercial)
CNE Certified Network Engineer (not duplicates)
CNI Clearinghouse for Network Information (not duplicates)
CNM Centralized Network Management
CNM Certified Nurse-Midwife
CNR Canadian National Railway (now CNNA)
CNS Customer Notification System
COA Children Of Alcoholics
COA Constant Output Amplifier
COB Civil Office Building
COD Carrier Onboard Delivery
COD Cash On Delivery
COD Customer Of the Day
COE Cab Over Engine
COF Control Of Facilities
COK Cat On Keyboard
COM Center Of Mass
COM Cost Of Money
CON Connection-Oriented Network
COP Center Of Pressure
COR Coefficient Of Refraction
COS Caching Operating System
COS Change Observation System
COS Common Open Software
COS Corporate Occupational Safety
COV City Of Vancouver
CPA Consumer Protection Act
CPA Continuous-Power Airport
CPC Cement Plaster Ceiling
CPC Centimeter Per Century
CPC Copies Per Century
CPD Cards Per Day
CPD Cards Per Decade
CPD Contact Potential Difference
CPD Copies Per Decade
CPD Cycles Per Degree
CPF Commercial Pre-Flight
CPG Cents Per Gallon
CPH Counts Per Hour
CPH Customer-Provided Hardware
CPI Computer Performance Inc.
CPL Computer Program Library
CPL Cursor Preceding Line
CPM Centimeter Per Month
CPM Characters Per Minute
CPM Control-Program, Microcomputer (commercial)
CPM Cycles Per Month
CPR Carbon-Pile Rheostat
CPR Cardio-Pulmonary Rehabilitation
CPS Cassette Programming System
CPS Circuit Package Schematic
CPS Control Power Switch
CPS Customers Per Second
CPS Cycles Per Second
CPT Critical Path Technique
CPW Commercial Projected Window
CPW Copies Per Week
CPY Cards Per Year
CPY Characters Per Year
CRA Commodity Requirements Analyst
CRC Campus Recreation Center (not duplicates)
CRC Community Resource Council
CRC Cooperative Research Centres (Australian)
CRC Cost Reimbursement Contract
CRE Corrosion Resistant
CRI Cray Research, Inc.
CRL Custodian Receipt Listing
CRM Collision Risk Model
CRM Counter RADAR Measures
CRP Carbon-Reinforced Plastic (chemical; plastic)
CRR Configuration Release Record
CRS Consolidated Requirement Schedule
CRT Cycle Reduction Time
CSA Cancer-Stick Addict
CSA Computer Standards Association
CSA Computer-assisted Semen Analysis
CSA Configuration Status Accounting
CSB Compare, Skip if Below (instruction)
CSC Communications Satellite Corporation
CSC Customer Service Center
CSD Central States Diversified, Incorporated
CSD Circuit-Switched Data
CSD Configuration and Status Development
CSE Certified System Engineer
CSF Carrier Striking Force
CSF Cerebro-Spinal Fluid
CSF Convertible Securities Fund
CSG Constructive Solid Geometry
CSI Certified Ski Instructor
CSI Control Sequence Introducer
CSI Controllable Summary Item
CSI Creative Solutions, Inc.
CSJ Christian Science Journal (publication)
CSM Chopped-Strand Mat (plastics)
CSM Computing Strategies and Management
CSM Customer Support Management
CSO Chief Staff Officer
CSP Cider Sequential Pulse
CSR Composition-Shingle Roof
CSR Critical Study Review
CSS Chain-Saw Safety
CSS Coded Switch System
CSS Contract Support Services
CST Certified Surgical Technologist
CST Cranio-Sacral Therapist (not duplicates)
CSU Channel Switching Unit (telephony; not duplicates)
CSU Crew Station Unit
CSV Comma-Separated Variable (not duplicates)
CTA Computer Test Aid
CTB Cipher Type Byte
CTC Centralized Traffic Control
CTC Computer Training Center (not duplicates)
CTC Computerized Training Center (not duplicates)
CTC Cursor Tabulation Control
CTD Cumulative Trauma Disorders
CTE Coefficient of Thermal Expansion
CTE Customer-Tested Equipment (not duplicates)
CTG Creative Technology Group
CTG Custom Training Group (commercial)
CTL California Tank Lines, Inc.
CTM Career Terminating Move
CTM Contractor Technical Memorandum
CTR Centro Internacionac De La Papa (company; Peruvian)
CTS Camera Tracking System
CTS Close To Shoulder
CTS Commercial Telephone System (telephony)
CTS Conversational Terminal System
CTS Customer Test-Software (not duplicates)
CTS Customer-Tested Software (not duplicates)
CTU Cabin Telephone Unit (telephony)
CUA Common User Access (commercial?)
CUH College and University Housing
CUT Coordinated Universal Time (see UTC, UCT)
CUV Clean Urban Vehicle
CVC Constant-Velocity Carburetor (not duplicates)
CVC Controlled Vortex Combustion (commercial)
CVF Crime-Victim Fund
CVP Central Venous Pressure
CVR Cockpit Voice-Recorder
CVT Continuously-Variable Trans-axle (not duplicates)
CVT Continuously-Variable Transmission (not duplicates)
CWA County Water Agency
CWC Clear Write Condition
CWC Copper-Weld Conductor
CWI Cyber-Works Institute (commercial; see inM)
CWL Clear Warning-Lamp
CWR CAD Work Request
CWS Cost of Work Scheduled
CWT Clear Watch-dog Timer (computer)
D1S Dressed One Side
D1W Dallas Semiconductor One-Wire bus
DAA Dog Agility Association (dogs)
DAC Days After Contract go-ahead
DAC Defense Advisory Committee
DAC Display And Control
DAC Document Availability Code
DAD Desktop Application Director (commercial)
DAE Dictionary of American English
DAF Definition And Funding
DAF Divorced Australian Father ('singles' advertising)
DAF Domestic And Foreign
DAI Development And Implementation
DAL Digital Accelerometer Loop
DAM Descriptor Attribute Matrix
DAM Divorced Asian Male ('singles' advertising)
DAM Divorced Asian Mom (or Mother; 'singles' advertising)
DAP Daily Activity Planning (not duplicates)
DAQ Define Area Qualification
DAR Digital Amateur Radio
DAR Drug-Abuse Resistance
DAS Data-Acquisition Set
DAS Direct-Acting Steam
DAT Duplicate Address Test
DAT Dynamic Address Translation
DAU Data-Acquisition Unit
DAW Distance At Way-point
DBA Doing Business As (not duplicates; both are used)
dBC deci-Bels below Carrier ([non]capitalization by creator)
DBC Delivery Bar Code
DBC Dynamic Braking Controller
DBE Data-Base Eurocontrol
DBI Design, Build, Install
dBm deci-Bels referred to one milli-Watt ([non]capitalization by creator)
DBM Doubly-Balanced Mixer
DBO Dead Black-Out
DBS Direct Broadcast Satellites
DBW Design Bandwidth
DCA Digital Communications Architecture
DCA Direct Current Amperes
DCA Distributed Communication Architecture
DCB Draw-out Circuit-Breaker
DCC Digital Cruise-Control
DCC Door-Closer Control
DCD Discrete Caution Display
DCD Divorced Chinese Dad ('singles' advertising)
DCE Distributed Computing Equipment
DCG Direct-Current Generator
DCG Divorced Christian God ('singles' advertising)
DCI Defense-Conversion Industry (military)
DCI Diamond Club International (company)
DCL Doctor of Civil Law (degree)
DCM Divorced Chinese Male ('singles' advertising)
DCM Divorced Christian Mom (or Mother; 'singles' advertising)
DCO Digitally-Controlled Oscillator (mine)
DCO Document Creation Order
DCP Digital Control Panel
DCS Data Correlation System
DCS Deputy Clerk of Sessions
DCS Distributed Control System
DCS Doctor of Commercial Science (degree)
DCT Discrete Cosine Transform
DCV Design Change Verification
DDA Data Differential Analyzer
DDA Direct Data-Access
DDA Direct Drawable Access
DDB Digital Data Bus
DDC Dual Diversity Comparator
DDC Dual-Disc Clutch (automotive)
DDD Destination Due Date
DDD Digital-Diagnostic Disk
DDF Demand Data File
DDI Digital Device Interface
DDI Digitized Data Identifier
DDM Data Display Manager
DDM Derived Delta Modulation
DDN Data Distribution Network
DDP Digital Data Processor
DDP Dual Digital Processor
DDR Deutsche Demokratische Republik German)
DDR Digital-Disk Recorder
DDS Decision Support System
DDS Direct Digital Service
DDS Dunfield Development Systems (company)
DDT Design Development Tests
DDT Dynamic Debugging Technique (not duplicates)
DEA Drug Enforcement Agency (US)
DEC Driver-Education Car
DED Diesel Engine Direct Drive
DEG Defensive Equipment Group
DEK Data Encryption Key
DEN Data Element Number
DES Data Extraction Segment
DES Data-Encryption Standard
DES Driver-Education Student
DET Department of Education and Training (formerly DTEC; Australian)
DFC Data Flow Control
DFD Divorced French Dad ('singles' advertising)
DFF Divorced French Father ('singles' advertising)
DFI Duke Farms, Inc.
DFM Divorced French Male ('singles' advertising)
DFT Design Facility Tool
DFT Distributed Function Terminal
DFW Department of Fish and Wildlife
DGA Dictionary Of Graphics Arts Abbreviations
DGU Display Generator Unit
DHE Dependable Highway Express (company)
DHG Dutch Harbor Group (commercial)
DHM Divorced Hispanic Male ('singles' advertising)
DHW Dry-Hole Well
DIC Diagnostic Imaging Center
DID Design Implementation Document (not duplicates)
DID Distributed Intrusion Detection
DIE Document Industrial Engineering
DIF Divorced Indian Female ('singles' advertising)
DIG Divorced Indian Goddess ('singles' advertising)
DIM Display Information Management
DIM Divorced Italian Male ('singles' advertising)
DIM Drive-In Movie
DIO Dedicated Input-Output
DIR Discrepancy Investigation Request
DIS Department of Information Services
DIS Development Information Service
DIS Dis-Information Services (joke; see DIS below, MIS)
DIS Dynamic Impedance Stabilization (commercial)
DIW D-Inside Wire *
DJF Divorced Jewish Father ('singles' advertising)
DJG Divorced Japanese Goddess ('singles' advertising)
DJM Divorced Japanese Mom (or Mother; 'singles' advertising)
DKA DK Aviation, Limited
DLC Data Link Control (not duplicates)
DLE Data Link Escape
DLE Development Liaison Engineer
DLG Dual-wheel Landing Gear (what?; see DLG!)
DLJ Donaldson, Lufkin, and Jennrette (company)
DLM Doublet Lattice Method
DLR Depot Labor Rate
DLR DOS LAN Requester
DLS Department of Labor Statistics
DLS Double Leading-Shoe
DMA Digital Multiple Access
DMC Differential-Mode Current
DMC Digital Microcircuit
DMD Digital Micromirror Device (commercial)
DME Digital Motor Electronics
DMF Diversified Mutual Fund
DML Dual Mode Launcher
DMM Data Memory Module
DMO Data Management Office
DMO Digital Memory Oscilloscope
DMS Data Memory Structure
DMS Directory of Marine Science
DMS Display Mode Set
DMT Discrete Multi-Tone (duplicates?)
DMT Discrete Multi-Tone
DMU Drum Memory Unit
DNC Democratic National Convention
DNC Direct Numerical Control
DNF Did Not Finish
DNS Data Network Service
DNS Domain-Name Space (not duplicates)
DNS Domain-Naming System (not duplicates)
DOA Department Of Agriculture
DOB Date Of Birth
DOC Day Of Century
DOD Department Of Defense (military; not duplicates; both are used)
DOE Department Of Education
DOE Depends On Experience
DOH Door-Opening Hardware
DOL Design Over-Load
DOM Deo Optimo Maximo (Latin)
DOM Divorced Oriental Mom (or Mother; 'singles' advertising)
DOM Drawn Under Mandrel (joke)
DOR Date Of Request
DOT Department Of Transportation
DOT Designated Optical Tracker
DOW Day Of Week
DOW Direct Over-Write
DPB Disk Parameter Block (not duplicates)
DPC Destination Preset Computer
DPC Distributed Parallel Computer
DPD Digital Phase Difference
DPD Discrete Power Device
DPE Digital Processing Element
DPI Dye-Penetrant Inspection
DPL Dome Petroleum Limited
DPM Development Program Manual
DPM MS-DOS Protected-Mode
DPO Dictionary Notes Printout
DPR Delta Performance Rating
DPR Double Pulse Ranging
DPS Document-Processing System
DPT Drip-Proof Totally enclosed (electric motor)
DPU Digital Power-Unit
DQM Data Quality Monitor
DRB Defense Review Board (military)
DRC Double Recessed-Contact
DRE Doctor of Religious Education (degree)
DRG Ducking, Running, and Grinning
DRM Dead Runners Mind
DRN Digital River Network (commercial)
DRP Data Rescue Project (WCDP)
DRR Digital RADAR Relay
DRS Data Relay Satellite
DRT Dead Reckoning Tracer
DRT Doppler RADAR Test set (not duplicates)
DS2 Digital Service Two
DSA Defense Supply Agency
DSA Dictionary Of Sigla And Abbreviations... (publication)
DSB Double Sideband Modulation
DSC Developers' Solution Center (commercial)
DSD Data Set Detail
DSE Display Station Emulation
DSF Directional Solidification Furnace
DSG Defense Systems Group (duplicates?)
DSG Defensive System Group (duplicates?)
DSL Deep Scattering Layer
DSL Digital Subscriber-Line (telephony)
DSM Dark Side Of The Moon @ (other; not duplicates)
DSM Diamond-Star Motors (company)
DSM Drafting-Standards Manual (not duplicates)
DSM Drawing-Standards Manual (not duplicates)
DSO Defensive Station Officer (not duplicates)
DSO Direct Service Order
DSP Digital Signal Processing (not duplicates)
DSR Device Status Register
DSR Document of Scheduled Release
DSS Decision Support System
DSS Defensive Subsystem Segment (military)
DSS Defensive System Simulator (military; not duplicates)
DSS Document Style Semantics
DST Daylight-Savings Time
DSU Data Switching Unit
DSU Drum Storage Unit
DTA Data Transmittal Authorization
DTC Desk-Top Conferencing
DTC Dynamic Transportation Company
DTE Development Test and Evaluation
DTF Data Transmittal Form (not duplicates)
DTI DAT International-France
DTO Data Transfer Offset
DTO De-rated Take-Off
DTP Drum Timing Pulse
DTR Demand Totalizing Relay
DTS Data Transfer Set
DTS Digital Theater System (commercial)
DTU Data Table Update
DTU Data Transfer Unit
DTW Dynamic Time-Warp
DUI Diagnostics User-Interface
DUN Dial-Up Networking
DVD Design-Verification Demonstration
DVD Digital Versatile Disc
DVL Direct Voice Line
DVS Digital Video System
DVS Doctor of Veterinary Surgery (degree)
DVW Discount Video Warehouse
DWF Divorced White Father ('singles' advertising)
DWL Driving With-out License
DWO Distributed Work Order
DWR Department of Water Resources
DXF Drawing eXchange Format (duplicates?; 'X' for 'exchange')
DYM Divorced Yellow Male ('singles' advertising)
EAA Engineer in Aeronautics and Astronautics
EAA Experimental Airport Association (contrived)
EAC Estimated Actual Cost
EAC Expected Approach Clearance
EAD Estimated Availability Date
EAF Executive Air Fleet Corp.
EAI Engine Anti-Ice (aircraft)
EAM Electrically Alterable Memory
EAN Exercise And Nutrition
EAP Energy Assistance Program
EAS Electronic Article Surveillance
EAS Estimated Air-Speed
EAW Eastern Acoustic Works (company)
EBH East-Bound Highway
EbN East By North (on compass rose)
EbS East By South (on compass rose)
EBT Electron Beam Tomograph (not duplicates)
ECA Economic Commission for Asia
ECA Electronic Card Assembly
ECB EDMS Control Block
ECB Event Control Block
ECC Electronic Climate Control
ECD Electronic Controls Design, Inc.
ECD Enhanced Color Display
ECE Electrical and Computer Engineering
ECG Electrical Classical Guitar
ECH Economy Car-Hauler (trailer; commercial)
ECL Enclosure Cabinet Library (commercial)
ECL Equipment Check List
ECM European-Community Multicenter
ECO Electron Coupled Oscillator
ECP Electronic Control Panel
ECR Ericson Commercial Refrigeration (company)
ECR Esso Resources Canada, Ltd.
ECS Engineering Coordination Sheet
ECT Electronic Circuit Test
ECT Endless-Cassette Tape
ECU English Church Union
ECV Enamel single Cotton Varnish (insulation)
EDA Embedded Document Architecture (commercial)
EDB External Data Bus
EDC Error Detecting Computer
EDD Engineering Data Depository
EDE Electronic Devices Engineering
EDI Electronics Design Incorporated
EDI Engineering Data Interface
EDL Equipment Data List
EDM Electronic Document Management
EDN Electronics Design News (publication)
EDP Electronic Design and Packaging
EDR Engineering Design Review
EDS Electronic Data System
EDS Express Deposit Service (commercial; banking)
EDT Eastern Daylight Time
EEA Ethylene Ethyl Acetate (chemical; plastic)
EEE Eastern Equine Encephalitis
EEL Epsilon Extension Language (commercial)
EEM Electronic Engineer's Master (publication)
EES Electrical and Electronic Supplies
EFC Electrical Flight-Control
EFC Electronic Fuel-Control
EFF Electronic Frontiers Foundation
EFI Electronic Fuel-Injection
EFM Expeditionary-Force Message
EGD Electro-Gas-Dynamics
EGS Electrical Ground-Support
EGS Exhaust Gas Turbine
EHA Electro-Hydraulic Actuator
EHS Extra High Shear
EHS Extremely Hazardous Substance
EIA Energy Information Administration
EIB European Investment Bank
EID Engineering Installation Drawing
EIO Economic-Indicators On-line
EIS Engine Indicating System
EIS Engine Instrument System
EIT Emplacement Installation and Test
EJR Engineering Job Release
ELA Elemental Activities
ELC End of Line of Code (not duplicates)
ELC End-of-Line Code (not duplicates)
ELF Explosive-actuated Light Filter
ELM Easy Lean Mail
ELO Engine Lubricating Oil
ELT Emergency Locator Transmitter
EMA Educational Media Association
EMA Electronics Manufacturers Association
EMC Electro-Magnetic Conduction
EMC Electro-Motive Company
EMD Electro-Magnetic Discharge
EMF Electro-Motive Force (music; not duplicates)
EMF Electro-Motive Force @ (other; not duplicates)
EMG Electromagnetic Marker Generator (not duplicates)
EMM Expanded-Memory Manager
EMM Expended-Memory Mangler (joke)
EMP Electric Motor-driven Pump
EMR Electro-Magnetic Relay
EMR Electronic Magnetic Resonance (not duplicates)
EMS Environment Maintenance Squadron
EMS Expanded-Memory System
EMT Electrostatic Memory-Tube
EMU Extra-vehicular Mobility Unit
ENA Education Networking Association
ENE East North-East (on compass rose)
ENT Equivalent Noise Temperature
EOA Employee Of All time
EOC Emergency Operations Center
EOC End Of Contract
EOD End Of Day
EOH End Of Header
EOH Engine Over-Haul (not duplicates)
EOL End Of Line
EOM End Of Medium
EOP Eastgate Office Park (real-estate)
EOR Edge Of the Road (music; joke)
EOS Earth Observing Satellite (not duplicates)
EOT End Of Test
EOV End Of Volume
EOW End Of Work
EPA Engineering Proposal Authorization
EPD Electric Power and Distribution
EPG End-Point Ground
EPI Electronic Payment Initiative
EPL Electrically Programmable Logic
EPO Erythro-P-Oietin
EPP Electrical Power-Pack
EPR Electron Paramagnetic Resonance
EPR Emergency Parts Requirement
EPS Electrical Power-Supply (not duplicates)
EPS Encapsulated PostScript (computer file extension; not duplicates)
EPT External Pipe Thread
EPV Electric-Powered Vehicle
EQP Environmental Quality Program
ERB Engine Re-Builder (not duplicates)
ERB Engineering Review Board
ERC Engineering Resources and Control
ERD Expected Receival Date
ERG Endicott Research Group
ERN Engineering Release Notice
ERO Eastern-Region Office
ERS Emergency-Response System
ERT Evaluation and Review Technique
ERU Educational Reserve Unit
ESA Engineering Scientific ASCII data format
ESA Engineering Support Activity
ESC Eastern Service Center
ESC Engine Supervisory Control
ESC Enterprise System Connection (commercial)
ESD Electro-Static Device
ESD Electronic Sensing Device
ESE Electro-Static Experiment
ESG Embedded Systems Group
ESG Engineering Steering Group
ESL Equivalent Series Inductance ('L' for 'inductance')
ESM Electrical Systems Manufacturer
ESN Electronic Service Number
ESP Encapsulating Security Payload
ESP Enhanced Serial Port (commercial)
ESP Extra Search Precision (commercial)
ESR Electro-Static Research
ESS Electronic Structure System (atomic)
ESS Engineering Support System
ESS Environmental Stress Screening
ESU Electro-Static Unit
ESU Element Supervisor Unit
ETA Embryo Toxicity Assay
ETC Eight-Track Cartridge
ETC Elapsed-Time Counter
ETC Endless-Tape Cassette
ETC Estimated Time to Complete (not duplicates)
ETE End To End
ETF Enriched Text Format
ETI Elapse Time Indicator
ETO European Theater of Operations
ETP Engineering Test Plan
ETS Econometric Time Series
ETS European Telecommunication Standard
ETT Estimated Time of Test
EUC End-User Computing
EUL Extended Useful-Life
EVA Ethylene Vinyl Acetate (chemical; plastic)
EVM Electronic Volt-Meter
EVM Evergreen Marine Ltd.-Taiwan
EWA Early Warning Aircraft
EWA Engineering Work Authorization
EWI Easy Way International (company)
EWS Electronic Warning System
F1S Finish One Side
FAA Federal Aviation Administration (US)
FAC Compania de Aviacion Faucett SA (Peruvian)
FAC First-Aid Card
FAD Foundation for Agricultural Development
FAE Fall-Arresting Equipment
FAF Fire And Flushing
FAJ First Assembly Jig
FAK First-Aid Kit
FAO Finished All Over
FAP File Access Protocol
FAR Federal Acquisition Regulations
FAR Forward Acquisition RADAR
FAS Flight Accessories Services, USA
FAS Foetal Alcohol Syndrome (not duplicates; both spellings are used)
FAT File-Access Table
FAV Fast-Attack Vehicle
FAW Fish And Wildlife
FBC Family Birth Center
FBC Fuel Backup Circuit
FBL Fly-by-Light
FBO Fixed-Base Operator
FBO Free-Base Operator
FBW First Bomb Wing (military)
FBW Fly By Wire (aircraft)
FCB File-Control Block
FCC File Carbon Copy
FCC Flight Control Computer
FCE Flight Control Electronics
FCF Functional Check Flight
FCI Federation Cynologique Internationale (language?)
FCM Fan-Cooled Motor
FCM First-Class Mail
FCP Fibre Channel Protocol
FCP Flight Computer Program
FCP Fourth-Class Postage
FCS First Customer Shipment
FCS Flux Changes per Second
FCT Form Cutting Tool
FCU Flush Control Unit
FCV Fuel-Control Valve
FDB Forced Draft Blower
FDC Fidelity Distributors Corporation
FDD Fixed-Disk Drive
FDE Flight Deck Equipment
FDG Fractional Doppler Gate
FDP Flight Demonstration Program
FDP Full Dog Point
FDR Final Drawing Release
FDS Final Data System
FDU Fear, Doubt, Uncertainty
FEA Functional Economic Analysis
FEB Functional Electronic Block
FED Far End Data
FEI Forest Electronics Inc.
FEL Free-Electron Laser
FEP Front-End Processor (not duplicates)
FES Far East Software
FES Ferro-Electric Storage
FFA Future Farmers of America
FFC Functional Flow Chart
FFF Form Fitting Function
FFH Fastener Fillet Hole
FFL Final Fantasy Legend
FFO Far Freaking Out! (not duplicates)
FFR Factory Flight-Readiness
FFT Farwest Furniture Transport (company)
FFV Fast-Forward Video
FGL First-Generation Language
FHA Farmers' Home Administration
FHA Fault Hazard Analysis
FHB Frequency Hopping Broadcast
FHC Fire Hose Cabinet
FHK Flight-Hardware Kitting
FHS Factory Headcount System
FHS Fetal Heart Sounds (not duplicates; both spellings are used)
FHT Four-door Hard-Top
FHT Fully Heat Treated
FIC First International Computer of America, Inc.
FIF Fractal Image Format
FIN Field Information Notice
FIP Facility Interface Processor
FIR Fast Infra-Red
FIS Flight Information Service
FIT Fault Isolation Test
FIV Feline Immuno-deficiency Virus
FKS Female Kallman's Syndrome
FLC Federal Laboratory Consortium
FLD Flight Loads Data
FLL Final Limit Lower
FLR Flap Load Relief
FLR Forward Looking RADAR
FMC Flight Management Computer
FMC Ford Motor Company (also FoMoCo)
FME Floor Mounted Equipment
FMR Follow Me Roaming (cellular telephone)
FMR Fuck Me Running!
FMS Flight Mode Selector
FMS Foward-Mounted Shocks (slang; see FMD)
FMU Foreign Module Unit
FMX Flyball Master Excellent (dogs; 'X' for 'excellent')
FNA Fermi National Accelerator
FNR Fund for Natural Resources
FNT Fleet Number Table and Report
FOA Forced Oil and Air
FOC Faint-Object Camera (HST)
FOC Fiber-Optic Communications
FOD Field Of Drawing
FOD Free-Of-Disease
FOE Fraternal Order of Eagles
FOG First Osborne Group (commercial)
FOI Freedom Of Information (Australian)
FOP Forward Observation-Post
FOP Fraternal Order of Police
FOS Face Of Stud (architectural)
FOS From Our Sponsor
FOT Field Operational Test
FOX Field-Operational X.500
FPA Focal Plane Assembly
FPC First Presbyterian Church
FPC Floating Point Coprocessor
FPD Facilities Planning Department
FPH Feet Per Hour
FPI Fast Probability Integration
FPL Field Programmable Logic
FPM Feet Per Minute
FPM Frames Per Month
FPR Floating Point Register
FPS Favorite Picture Selection
FPS Floating-Point System
FPS Foot, Pound, Second
FPS Four-Pole Switch
FPY Feet Per Year
FQP Fully-Qualified Path
FRA Federal Railroad Administration
FRB Fiber-Reinforced Board
FRC Flight Research Center
FRG Federal Republic of Germany
FRM Fiber-Reinforced Metal
FRO Federal Register On-line (not duplicates)
FRR Field Rework Record (not duplicates)
FRR Filled Rework Record (not duplicates)
FRT Flight Readiness Test
FRZ Frigging Religious Zealot (not duplicates)
FSA Fellow of the Society of Actuaries
FSB Fully Serviceable Bearing (commercial)
FSC Federal Stock Class
FSD Fabrication Services Division
FSE Facilities System Engineering
FSE Field-Support Equipment
FSG Federal Supply Group
FSI Fast Serial Interface
FSM Field-Strength Meter
FSN Full-Service Network
FSP Federal Security Police (fiction; Star Wars)
FSR Field Service Representative
FSR Field Strength Radio
FSS Federal Specification Standards
FSS Front Spar Station
FST Flat Square Tube (video monitor CRT; undesirable (we want 4/3), and fotunately, does not exist!)
FSU Former Soviet Union
FSV Four-Spool Valve
FTA File Transfer Access
FTB Flying Test-Bed
FTC Failure To Comply
FTC Fast Time-Constant
FTC Fault-Tolerant Computer
FTC Federal Trade Commission
FTC Flat-Tappet Camshaft
FTC Flight Test Center
FTC Following Too Closely
FTD Florist's Transworld Delivery (company)
FTD Frequency Translation Distortion
FTE Flight Factory Equipment
FTG Final Trunk Group
FTH Fiber To the Home (also FTTH; see FTC)
FTI Frequency-Time Indicator
FTL Flying Tiger Line, Incorporated
FTM Foiben Taosarintanin' i Madagasikara (language?)
FTP Four-Track Player
FTP Functional Test Preliminary
FTR Fuel-To-Remain
FTS Flight Telerobotic Servicer
FTT Fixed Target Track
FTU Federation of Trade Unions
FTW Fuck The Work
FUO Fever of Unknown Origin
FWA First West Airlines (company)
FWA Front-Wheel Alignment
FWG Facilities Working Group
FWT Fifth-Wheel Trailer
FYA For Your Action
FYA Fuck You, Asshole
FYW For Your Worth
GAA General Account of Advances
GAA General Agency Agreement
GAA Government Advertising Agency
GAA Gravure Association of America
GAA Skrifter Utgivna av Kunglia. Gustav Adolfs Akademien (publication; language?)
GAB Great American Beer
GAB Great Artesian Basin
GAC General-Access Copy
GAC Geological Association of Canada
GAC Goodyear Aerospace Corp.
GAC Grilled American Cheese
GAC Ground-to-Air Communications
GAC Gustavus Adolphus College
GAD Gay Asian Dad ('singles' advertising)
GAG Gay Asian Goddess ('singles' advertising)
GAI Gate Alarm Indicator
GAI GUI Application Interoperability
GAM General Atomic and Molecular
GAM Gross Available Manpower
GAO Guest Archival Observer
GAP Government Accountability Project
GAP Ground Avionics Prototype
GAS Georgians Against Smoking
GAS Graphic Aid System
GBA Gambling and Betting Addiction
GBD Giga-Bytes per Day
GBE Dame Grand Cross of the British Empire
GBI Geographic-Based Information
GBI Gyroscope Bottoming Indicator
GBL Ground-Based Laboratory
GBS Giga-Bytes per Second
GBT General Business Technologies, Inc.
GBW Gain-Band-Width
GCA Generated Column-Address
GCB Gel-Cell Battery (commercial; plumbum-sulfur battery)
GCC Grilled Cheddar Cheese
GCD Gay Chinese Dad ('singles' advertising)
GCD Gold Star Compact-Disk
GCE Golf-Club Estate (not duplicates)
GCE Greenwich Continuing Education
GCG Gay Christian God ('singles' advertising)
GCL Green Caution-Lamp
GCL Ground Control Landing
GCM Ground Control Message
GCP Group Change Program
GCS Global Combat Support
GCW Guided Conventional Weapon (military)
GDA Global Data Area
GDB GNU source-level De-Bugger
GDC Glass-Dielectric Capacitor
GDC Graphics Display Controller
GDG Generation Data-Group (see GDS)
GDP Graphic Draw Primitive
GDS Geophysical Data System
GDS Global Directory Service
GDT Geometric Dimensioning and Tolerancing
GDT Graphics Development Toolkit
GED Geological Engineering Department
GER Geographic Encoding and Referencing
GES Ground Earth Station
GET Gabelli Equity Trust (commercial)
GeV Giga Electron-Volts
GFD Government-Furnished Data
GFH Go Fuck Him
GFM Gay French Mom (or Mother; 'singles' advertising)
GFO Gap Filler Output
GFO Ground-Floor Opportunity
GFS Government Furnished Software
GGS Georgia Geologic Survey
GHC Gaseous-Helium Compressor
GHE Ground Handling Equipment
GHF Gear-Hobbing Fixture
GHR Ground Handling Relay
GID Gay Italian Dad ('singles' advertising)
GIF Growth and Income Fund
GIG Gay Indian Goddess ('singles' advertising)
GIG Gay Italian Goddess ('singles' advertising)
GIL Government Information Locator
GIS Global Information Solutions (commercial)
GJD Gay Japanese Dad ('singles' advertising)
GJF Gay Japanese Female ('singles' advertising)
GJF Gay Jewish Female ('singles' advertising)
GJM Gay Jewish Male ('singles' advertising)
GLB Godlry's Lady's Book ([old] publication)
GLM Gigabit-Link Module
GLO Global Learning and Observations
GMA Good Morning America
GME Grolier Multimedia Encyclopedia (commercial)
GML General Modeling Language
GMM Genetically-Modified Microorganism
GMP Global, Mobile, Professional
GMR Global Message Relay
GMS Global Messaging Service
GMV Guaranteed Minimum Value
GNC Government Non-Conformance item
GNG Go/ No-Go
GNU Geologic Names Unit (USGS)
GOE Ground Operations Equipment
GOM Gay Oriental Male ('singles' advertising)
GOM Gay Oriental Mom (or Mother; 'singles' advertising)
GOP Group Of Pictures
GPA Grade-Point Average
GPC Gypsum Plaster Ceiling
GPD Geometric Parameter Drawing
GPD Giga-samples Per Decade
GPD Grams Per Decade
GPI General Precision Instruments
GPM Gallons Per Mile
GPO General Post-Office
GPO Government Post-Office
GPO Government Printing Orifice (joke)
GPS General-Purpose Simulator
GPU Ground Power Unit
GPY Giga-samples Per Year
GPY Grams Per Year
GRA Geographical Resources Analysis
GRD Grinning, Running, and Ducking
GRG Greater Gulf-Persian Gulf
GRP Gateway Routing Protocol
GRP Glass Reinforced Plastic (not duplicates)
GRP Group Reference Point (not duplicates)
GRT Garrett Turbine Engine Company
GSB Ground Service Bus
GSD Giga-Samples per Day
GSE General System Equipment
GSF Gear Shaving Fixture (not duplicates)
GSH Giga-Samples per Hour
GSJ Geological Survey of Japan
GSN Gateway Services for NetWare (commercial)
GSP Global Solution Provider
GSP Government Support Part
GSR Global Security Research
GSS Graphic Size Selection
GST Ground System Test
GTA Ground-To-Air
GTC General Technology Corporation
GTC Government Test Centers
GTD Geometrical Theory of Diffraction
GTi Gordon Trucking, Inc. @ (company; not duplicates; both are used; [non]capitalization by creator)
GTN Glyceryl Tri-Nitrate (chemical; high explosive)
GTO Geostationary Transfer Orbit
GTP Grand-Tourisimo, Production (not duplicates)
GTR General Technical Requirements
GTR Government Travel Request
GTS Ground, Terminal, Splice List
GTV Ground-Test Vehicle
GUM General User Management
GUR General User Repair
GUS Gravis Ultra Sound (commercial)
GVH Giga-VAR Hour
GWB G. W. Busch (school)
GWE Global Weather Experiment
GWF Gay White Father ('singles' advertising)
GWG Gay White Goddess ('singles' advertising)
GWM Gay White Mom (or Mother; 'singles' advertising)
GWW the Great World War
GZT Greenwich Zone Time
H2O Hydrogen, Two molecules of, Oxygen (chemical; di-hydrogen oxide; water)
HAA Handbooks of Archeology and Antiquities
HAA Height Above Airport
HAA High Angle of Attack (aircraft; not duplicates)
HAA Houseboat Association of America
HAA Human-Asset Accounting
HAB Heavy Assault Brigade
HAB Home Address Block
HAC Heading Alignment Cone (not duplicates)
HAC Heavy-Aggregate Concrete
HAC Hexamethylmelamine, Adiamycin, Cyclophosphamide (drug)
HAC High-Aluminous Concrete
HAC Honourable Artillery Co.
HAC Humanities Association of Canada
HAD Hardened And Dispersed
HAE Hearing-Aid Evaluation
HAE Hereditary Angio-neurotic Edema
HAF High-Altitude Fluorescence
HAG Helicopter Action Group
HAG High-explosive Anti-armor Grenade (military)
HAH Heaven And Hell (music; not duplicates)
HAH Heaven And Hell @ (other; not duplicates)
HAI Health Action International
HAI Holland Automation International (commercial?)
HAL Hawaiian Air-Lines, Inc. (formal; not duplicates)
HAL Hazards Assessment Laboratory
HAL Hemispheric Activation Level (commercial)
HAL High-order Algorithmic Language
HAL Hungarian Air-Lines (company)
HAP Hardness Assurance Plan
HAP Hardness Assurance Program
HAS Hardware Allocation Schedules
HAS Herman's Appliance Service (company)
HAT Hypertext Access Technology
HBF High-Bay Fixture
HBL Heated Back-Light
HBP Health Benefits Program
HCA Hydro-Cinnamic Aldehyde (chemical)
HCC Hood Canal Communications (company)
HCG Human Chorionic Gonadotropin (not duplicates; both are used)
HCI High-Tensile Cast-Iron
HCM Hard Core Memory (?)
HCP Hard-Copy Printer
HCP Hexagonal Close Packed
HCR High Commission for Refugees (UNHCR; not duplicates)
HCS Hand Control South
HCS High-Current Safety
HCU Homing Comparator Unit
HCW Hydrological Cycle and Water
HDB Hold-Down Bolt
HDC Hard-Drive Controller (not duplicates)
HDD High-Density Digital
HDL Hardware Data-Link
HDP High-Definition Progressive
HDR Hennigson, Durham, and Richardson *
HDR High-Density Routing
HDS Hardware Disk Striping
HEA Highland Express Airways, Ltd.
HED Home Economics Department
HEI House Ear Institute
HEL Home-Equity Loan (banking)
HES Hardcopy Exploitation Segment
HFB Hand Form Block
HFC High-Frequency Control
HFE Human Factors Engineering
HFM Hachette-Filipacchi Magazines
HFR High-Frequency Release
HFS High-Frequency Switch (not duplicates)
HFS High-Frequency Switching (not duplicates)
HFS Holy Family School
HGH Human Growth Hormone (not duplicates; both are used)
hGH Human Growth Hormone @ (not duplicates; both are used)
HGS Head-up Guidance Panel
HHS Health and Human Services
HIA Hearing Industries Association
HIF Hyper G Interchange Format
HIH His Imperial Highness
HIP High-Impact Plastic (not duplicates)
HIV Human Immuno-deficiency Virus
HKF H.K. Ferguson Co.
HLC Heavy Lift Cargo Airlines (company)
HLO High Lunar Orbit
HLR High-Level Radiation
HMA Home Mortgage Account (banking)
HMC Honda Motor Company (not duplicates)
HMC Hyundai Motor Company (not duplicates)
HME Hellenic Marine Environment
HMM Hyper Media Management
HMP Health and Medical Program
HMS Hot-Milled Steel
HNE Health equals Nutrition and Exercise
HNG Hot-News Gazette
HOC Height Overlap Coverage
HOE Homing Overlay Experiment
HOM House Of Mirrors
HPA High Power Amplifier
HPA High-Pressure Air
HPC Hours Per Century
HPD Hard-Point Defense (military)
HPE Hawks Prairie Electric (company)
HPG High-Pressure Gas
HPI Health Physics Instruments
HPL Hyper-Pro-Lactinemia
HPM Hours Per Minute
HPP Hydraulic Power-Pack
HPS Hits Per Second
HPS Hydraulic Pressure Switches
HPU Hand-held Privacy Unit (commerical; cellular telephone scrambler!; telephony)
HPW High-Pressure Water
HPW Hits Per Week
HRC High Rupturing Capacity
HRD Human-Resources Development
HRG Hemispherical Resonator Gyroscope
HRI High-Resolution Imager (ROSat)
HRM Heart-Rate Meter (not duplicates)
HRM Heart-Rate Monitor (preferred; not duplicates)
HRR High-Resolution Radiometer
HRV High Resolution Visible
HRW Harpur Radio Workshop (SUNY)
HSC Hierarchical Storage Controller
HSD High-Speed Data
HSE Helsinki School of Economics (Finland)
HSH Hexagonal Socket Head
HSM Hard Structure Munition
HSO High-Speed Optical
HSP High-Speed Parallel
HSS High-Speed Steel
HSW Hazardous and Solid Waste
HTA Hardware Test Aid
HTF Height Finding
HTH Hope This Hurts
HTM Hard Tube Modulator
HTS Heat-Treated Steel
HTT Hard Target Track
HUA Hydrologic Unit Area
HUI Handicapped-User Interface
HUT Helsinki University of Technology
HVF Hyper-Viscous Fluid
HVR High-Voltage Regulator
HVR High-Voltage Research
HWG HTML Writers Guild @ (not duplicates; both are used; internet URL)
HWH Hot-Water Heater
HWP Height/ Weight Proportionate (fat in 'personals' talk)
I2R Imaging Infra-Red ('I2' [I squared] for 'II')
IA2 International Alphabet Two
IA4 International Alphabet Four
IAA International Actuarial Association
IAB Internet Activities Board
IAC Installation And Check-out
IAD Incision And Drainage
IAD Inter-American Development
IAE In Any Event
IAF Imperial Iranian Air-Force (military)
IAI Installation And Interval
IAM Industrial and Applied Mathematics
IAM International Association of Marathoners
IAP Industry Applications Programs
IAP Internet Account Provider
IAS Information Access System
IAS Internet Access Software
IAT Income After Taxes
IAT Internet Appliance Toolkit
IAU Intravenous Access Unit (fiction; Star Wars))
IBC Integral Block Controller
IBL International Book and Library
IBL Ion-Beam Lithography
IBM Idiot Behind Modem
IBM Incontinent Bowel Movement (contrived?)
IBM Institute of Builders' Merchants
IBO International Business Organization
IBP Independent Bid and Proposal
IBR It's Been Real
IBS Internal Business Systems
IBU Instrumentation Buffer Unit
IC1 Integrated-Circuit One (in a diagram)
IC7 Integrated-Circuit Seven (in a diagram)
ICA Intelligent Console Architecture
ICA International Communication Association
ICA Intra-application Communications Area
ICC International Carbide Corporation
ICE Current in a Capacitive reactance leads Voltage ('I' for 'intensity [of current]'; 'E' for 'voltage')
ICE Increased Combat Effectiveness
ICE Instituto Costarricense de Electricidad (language?)
ICG Interactive Computer Graphics
ICH Inertial Commanded Height
ICI Intra-Cervical Insemination
ICM International Crystal Manufacturing Co. Inc.
ICN Inventory Control Number
ICR Industrial Commercial Residential
ICR Iron Core Reactor
ICS Instrumentation and Communications Subsystem
ICS Inter-Communication System
ICS Internet Connection Services
ICT Inspection Check Template
ICT Integrate Combat Turnaround
ICU Interface Control Unit
ICV Initial Chaining Value
ID4 Independence Day, Fourth of July
IDA Integrated Database Application
IDA Intelligent Drive Array (not duplicates)
IDC Insulation-Displacement Connector
IDC Integrated Database Connector (commercial?)
IDE Imbedded Drive Electronics (contrived or unknown; odd spelling)
IDE Interface Design Editor
IDI International Developers, Inc.
IDM Internal Data Memory
IDR Input Data Register
IDR Internal Design Review
IDS Interface Design Specification
IE4 Internet Explorer Four (commercial)
IED Innovative Electronic Designs
IEE Institute of Electrical Engineers
IEP Internet Exchange Packet
IER Integrated Employee Records
IEX Imaging Extensions for X-Windows (commercial)
IFD Image File Directory
IFE In-Flight Entertainment
IFI In-Flight Insertion
IFL International Forces In Lebanon (UNIFL)
IFR International Flight Research Corp.
IFS Internet File System
IFT Integrated Functional Test
IGC Industrial Garbage Customer
IGC Integrated Graphics Controller
IGM Insulating-Glass Manufacturer
IGS Image Generation System
IGS Interactive Graphics Standards
IGS Internet Go Server
IGY International Geophysical Year
IHF I Hate Fat!
IHR IGIA Hair Removal system
IHU I Hate You ('U' for 'you')
IIA Independent Insurance Agent
IID Information Industry Directory
IIL Integrated-Injection Logic
IIR Interrupt Identification Register (microprocessor)
IJA International Jet Air, Ltd.
IJI Initiative on Joint Implementation
ILA Institute for Laboratory Astrophysics
ILA Instrument Landing Approach (aircraft)
ILF Inlet-Line Filter
ILS Information Locator Service
ILT Imprecisely Located Targets
ILU Inter-Language Unification
IMC Indirect Maintenance Cost
IME Input-Method Editor
IME Internet Mail Extension
IMI Intermediate Maintenance Instruction
IMI International Memories, Inc.
IMM Integrated Multimedia Monitor
IMP Integrated Mechanism Problem
IMS Image Motion Stabilization
IMS Indianapolis Motor Speedway
IMS Internet Message Support
INA Iran National Airlines Corporation
IND Internet News Daemon
INN Inter Node Network
INO International NOTAM Office
INS Integrated Network Server
IOC Idea Of the Century
IOC Indirect Operating Cost
IOC Inter-Office Channel
IOC International Olympic Committee
IOF Independent Order of Foresters
IOM Inter-Office Memorandum
IOP Individual Operating Plan
IOS Inter-Office Signaling (telephony)
IOU Input-Output Unit
IPA Intellectual-Property Agreement
IPC Institute for Interconnecting and Packaging Electronic Circuits
IPC International Printed Circuit Designers Council
IPD Impressions Per Day
IPD Integrated Power Device
IPE Initial Provisioning Engineering
IPH Iterations Per Hour
IPL Individual Personal Loan (banking)
IPL Inland Power And Light (commercial)
IPL IPAD Program Library
IPM Inches Per Minute
IPO Integrated Purchase Order
IPS Impact Protection System
IPS Inches Per Second
IPS Input-Output Per Second
IPS Instrument Performance Summary
IPS Iterations Per Second
IPX Internetwork Packet eXchange ('X' for 'exchange'; commercial?)
IQS Integrated Queuing System
IRA Individual Retirement Account (correct; banking)
IRA Irish Republican Army (military)
IRC International Rectifier Company
IRD Initial Requirements Determination
IRL In Real Life
IRL Inter-Repeater Link
IRM Information Resource Management
IRM Instant Reference Manual
IRR Internal Rate of Return
IRS Information Referral Service
IRS Inter-Record Separator
IRS Internetwork Routing Service
IRS Inventory Redistribution System
IRW Infrared Warning
ISA Interactive Services Association
ISB Interface Scheduling Board (not duplicates)
ISC Idle-Speed Control
ISC Instruction Set Computer
ISD Imperial Star-Destroyer (fiction; Star Wars))
ISE Implementation Support Activity
ISI Initial Support Increment
ISI Integrated Systems, Inc.
ISL Interactive System Language
ISN Initial Sequence Number
ISO International Organization for Standardization
ISP In-Service Problem
ISP Internet Service Provider
ISP Interrupt Stack Pointer
ISR Isothermal Systems Research
ISS International Space Station
ISS International Systems and Services
IST Instrument Science Team
ITA Independent Telephone Association
ITA International Trade Association
ITC Integration and Test Center
ITC Internal Transaction Code
ITD Italian Treasury Department
ITG Intra-Tubal Growth
ITN Inter-Transfer Number (banking)
ITP Income-Tax Preparer
ITR Inverse Time Relay
ITS Interactive Terminal System
ITS Interagency Telecommunications System
ITT Integrated Test Tape
IUA Interactive User Access
IUG Intra-Uterine Growth
IVD Image Velocity Detector
IVD Ion Vapor Deposited
IVL Independent Vendor League
IVT Infinitely-Variable Transmission
IVV Independent Verification and Validation
IWU Insulated Window Unit
IWW Industrial Workers of the World
JAA Joint Aviation Authorities
JAB Justerini And Brooks (company?)
JAC Jeunesse Anarchiste Communiste (French)
JAC Jorgen Automotive Corp.
JAC Junior American Citizens
JAE Joint Atomic Exercise
JAF Jamestown Area Furniture Haulers' Association, Inc., Buffalo, New York
JAF Job Accounting Facility
JAH Journal of Asian History
JAI Jami'at Al Islan (language?)
JAI Join And Installation
JAI Journal. Royal Archaeological Institute
JAL Jammer Allocation Logic
JAM Job-Analysis Memorandum
JAM Joint Analyzed Make-up
JAN Joint Academic Network (UK; also JANET)
JAP Joannou And Paraskevaides (language?)
JAP Justice And Peace
JAW Jacob's And Walker's English Chancery Reports
JBD Jet-Blast Deflector
JCB Juris Canonici Baccalaureus (Latin)
JCN Joint Control Number
JCW Jumper-Cable Wizard (commercial)
JDK Java Developers' Kit (commercial?)
JDR Jeffery D. Rose (company)
JEI Japanese Electronics Industry
JEP Joint Engineering Planning
JET Japan External Trade (not duplicates)
JEW Joint Electronic Warfare (military)
JGR Journal of Geophysical Research
JIC Joint Ice Center (US Navy-NOAA; military)
JIN JSC Information Network
JIT Just In Time (commercial; compiler; not duplicates)
JIT Just In Time @ (other; not duplicates)
JLA Jammer Logic A (military)
JMA Japan Meteorological Agency
JNA Jump if Not Above (instruction)
JNC Joint National Committee
JNI Java Native Interface (commercial)
JOB Just Over Broke
JOL Jaws Of Life (a very poor name!)
JOV Jules' Own Version (commercial)
JPG Jim Patterson Group (commercial?)
JPO Joint Program Office
JRD Justification Review Document
JRT Job Release Ticket
JSC Jet Support Centre (UK)
JSD Jackson System Development (commercial?)
JSI Jeppesen Sanderson, Incorporated
JSR Joint Services Review
JTC Joint Training Center
JTG Joint Task Group
JTM Job Transfer and Manipulation
JTO JOPES Training Office (commercial?)
JTV Joint Tactical Vehicle
JWG Joint Working Group
JWI Joint Warrior Interoperability
KAB Knowledge, Attitudes, and Behaviour Survey
KAF Khmer Air-Force (military)
KAF Kinase-Activating Factor
KAI Keep America Independent
KAK Key-Auto-Key
KAM Kehillath Ansche Mayriv (language?)
KAO Knights of Aquarius Order
KAO Kuiper Airborne Observatory
KAS Katz Adjustment Scales
KAS Kenya-Australia Society
KAS Kulanka Afka Somalyed (language?)
KAU King-Armstrong Unit
KBA Keto-Butyraldehyde dimethyl Acetal (chemical)
KBB King's Bad Bargain
KBC Kaufman Brothers Construction, Inc.
KbD Kilo-Bits per Decade
KBE Knight Commander of the British Empire
KBE Knowledge-Base Engineering (not duplicates)
KBL Key-Board Listener
KBL Key-Board Lock
KBM Kilo-Bytes per Month
KBP Key-Board Process
KBS Kankakee, Beaverville and Southern Railroad (company)
KBT Kerry Blue Terrier (dogs)
KBU Knuckle-Buster University
KCA Kentucky Callers' Association
KCB Kartell Convent Blaetter *
KCC K-III Communications Corp.
KCE Key Clinical Finding
KCL Key-station Control Language
KCL Knudsen Cosine Law
KCM Kirchhoff Coda Migration
KDP KEY Decision Point
KDS Korea Data Systems (company)
KEW Kinetic Energy Weapon
KGB Kewaunee, Green Bay, And Western (railroad; company)
KGB Kindly Gunn Bunch ?
KHA Kiss Her Ass
KHI Kawasaki Heavy Industries
KIF Knowledge Interchange Format
KKV Kinetic Kill Vehicle
KME Kovatch Mobile Equipment (motor vehicle; company)
KMH Kilo-Meters per Hour
KMT Kinetic Molecular Theory
KMU Kleine und Mittlere Unternehmen (language?)
KOP Knights Of Pythias
KPD Kilograms Per Day
KPM Kilo-samples Per Minute
KPM Kilo-samples Per Month
KPM Kilometers Per Month
KPS Kitsap Physicians' Service (commercial)
KRP Key-Ring Protection
KSD Kilo-Samples per Day
KSH Key-Strokes per Hour
ksi Kilo pounds per Square Inch
KSR Keyboard Send-Receive
KSY Kilo-Samples per Year
KVH Kilo-VAR Hour
KVX Kill Vehicle eXperiment ('X' for 'experiment')
KWG Keep Washington Green!
L2F Layer Two Forwarding (commercial?)
LAB Launch And Boost
LAC Limited-Access Copy
LAC Low Altitude Calibration
LAD Landscape Analysis and Data
LAE Latin-American Economics
LAI Latin-American Integration
LAM Limited Area Model
LAM Local-Area Multi-computer
LAN Linea Aerea Nacional (company; language?)
LAN Local-Area Network
LAR Local Address Register
LAS Light Activated Switch
LAS Locked And Sealed
LAT Local Area Transport
LAW Lacey Auto Works (not duplicates; same company; Washington)
LAW Living And Well
LBB Little Black Book
LBL Lawrence Berkeley Laboratories
LBP Land-Based Patrol
LCA Land Cover Analysis
LCB Laminated Circuit Board
LCC Last-Chance College
LCC Local Common Channel
LCF Low Cost Fiber
LCI Low Cut-In (automotive DC generator RPM)
LCI Lydig Construction Inc.
LCL Less than Carload Lot
LCM Life-Cycle Management
LCP Lateral Control Package
LCR Logistics Command Regulation
LCS Laboratory for Computer Science
LCS Life-Cycle Study
LCS Load-Carrying Structure
LDA Lame-Duck Amendment
LDA Localizer Directional Aid
LDB Last Data-Bit
LDC Loss-less Data Compression
LDD Local Digital Communication
LDI Lighting Dimensions International (trade show)
LDO Language-Dependent Objects
LDP Language Data-Processing
LDP Linux Documentation Project
LDR Low Data-Rate
LDS Landing Data System (aircraft; not duplicates)
LDT Linear Differential Transformer
LEA Logistics Effects Analysis
LEA Logistics Engineering Analysis
LEJ Longitudinal Expansion Joint (architectural)
LEL Link, Embed, Launch
LEO Low Earth Orbit
LER Leading-Edge Radius
LES Launch Escape Signal
LET Launch Escape Tower
LFA Loop Facilities Assignment
LFB Left Full-Back
LFD Lacey Fire District (Washington)
LFO Legal Financial Obligation
LFO Low-Frequency Oscillator
LFS Launch Facility Simulator
LFV Leichtensteinische Fremden-Verkehrszentrale (language?)
LGA Land-Grid Array (IC package/ socket)
LGS Laser Geodynamic Satellite
LHB Left Half-Back
LHS Left-Hand Side
LIA Local Internet Access
LIC Land Information Council
LIC Level Inertial Capture
LIC Logic Integrated Circuit
LIG Lesbian Interest Group
LIP Lightweight Internet Person
LIS Lightning Imaging Sensor
LIS Local Information System
LIU LAN Interface Unit
LIU Line Interface Unit (telephony)
LJC Limited-Jurisdiction Court
LLC Line Length Code
LLC Low-Level Compatibility
LLH Long Leg Horizontal (architectural)
LLP Link Level Protocol
LLU Local Logic Unit
LMB Left Mouse Button
LMF Low and Medium Frequency (not duplicates)
LMF Low-Medium Frequency (not duplicates)
LMO Lens Modulated Oscillator
LMS Laser Mass Spectrometry
LMU LAN Management Utilities (commercial)
LMU Local Memory Unit
LNE London and North Eastern (railroad; UK)
LNG Liquid Natural Gas
LOA Left Occipito-Anterior (not duplicates)
LOC Large Optical-Cavity
LOC Local Operating Company
LOC Loop On line Control
LOF Length Of File
LOF Libby Owens Ford (company)
LOI Loss Of Investment (not duplicates)
LOM List Of Material
LON Local Operating Network
LOP Line Of Position
LOR Light Of Reason
LOS Length Of Stay
LOU Legal Offender Unit
LPC Life-Purpose Counciling
LPC Liters Per Century
LPC Luis Palau Crusade
LPD Line Printer Daemon
LPD Luteal Phase Defect (not duplicates)
LPG Low-Pressure Gas
LPL Line Printer Local
LPM Laleh's Pattern Matcher
LPM Liters Per Month
LPN Long Part-Number
LPS Launch Phase Simulator (NASA)
LPS Local Power-Supply
LPT Lunar Propellant Tanker (NASA)
LPU Local Power-Unit
LPY Liters Per Year
LQS Lot Quantity Schedule
LRC Low-Resolution Color
LRF Law Research Foundation
LRM Line Replaceable Module
LRM Low-Resolution Monochrome
LRU Least-Recently Used
LRU Line Record Update (telephony)
LSB Least-Significant Bit
LSC Linear Shaped Change
LSC Loop Station Connector
LSD Least-Significant Display
LSD Limited-Slip Differential
LSI Large-Scale Integrated circuit (not duplicates)
LSN Linear Scaling Number
LSP Lame S Paper (mine for newspaper)
LSR Load Shifting Resistor
LSS Loop Switching System
LST Landing Ship, Tank
LTA Lawn-Tennis Association
LTC Light-Transfer Characteristics
LTE Luft-Transport Espana
LTI Left-Turn Indicator
LTL Less than Truck-load Lot
LTN Louisville [line], Tandem [axle], Nose (commercial; Ford truck)
LTO Low Turn-On (automotive DC generator RPM)
LTS Loss Test-Set (telephony)
LTV Loads Test Vehicle
LUF Luteinized Unruptured Follicle
LUI Library User Information
LUS Land-Use Survey
LUS Limited Update, Stereo
LVL Logical Volume Label
LVR Low-Voltage Release
LWL Length at Water-Line
LWP Leave Without Pay
LWT Last Will and Testament
LWW Left Wheel-Well
M2C Massachusetts Microelectronics Center ('M2' [M squared] for 'MM')
MAA Maximum Authorized Altitude
MAB Missile Assembly Building (military)
MAC Manufacturing-Assistance Computer
MAC Media Access Control (plural; not duplicates)
MAC Multi-user Acquisition Contract
MAD Mobile Automotive Detailing
MAD Mutual Assured Destruction
MAE Medical Abbreviations And Eponyms
MAE Metropolitan-Area Ethernet
MAH Medical Abbreviations Handbook (publication)
MAI Multiplexer Action Item
MAL Manufacturing Analysis List
MAN Metropolitan Area Network
MAP Maintenance Analysis Procedures
MAP Marine Applications Project
MAP Motorist Assurance Plan (commercial?)
MAQ Microsoft Access Query (computer file extension; not duplicates)
MAQ Microsoft Access Query @ (other; not duplicates; commercial)
MAR Microprogram Address Register
MAR Microsoft Access Report (computer file extension; not duplicates; commercial)
MAT Machine-Aided Translation
MAT Mean Access Time
MAT Multimedia Applications in Telecooperation
MAU Media Access Unit (not duplicates)
MAU Medium Attachment Unit
MBB Messerschmidt Boelkow Blohm (company; German)
MBD Minimal Brain Dysfunction
MBE Molecular-Beam Epitaxy
MbH Mega-Bits per Hour
MBM Mega-Bytes per Month
MBS Marine Biological Station
MBW Medium Band-Width
MbW Mega-Bits per Week
MCA Marine Corps Avionics (military)
MCC Marine Corps Computer (military)
MCD Mono-Cartridge Deck
MCE Machinery and Computer-Equipment
MCE Marine-Corps Electronics (military)
MCE Moscow City Exchange
MCI Mode C Intruder
MCI Myo-Cardial Infarction
MCM 1000 Circular Mils ('M' - the Roman number for 1000)
MCP Macmillan Computer Publishing (company; not duplicates; both are used)
mcp Macmillan Computer Publishing @ (company; not duplicates; both are used)
MCP Master of City Planning (degree)
MCR Modem-Control Register
MCS Maximum Control Speed
MCS Military Command System
MCS Mixture-Control Solenoid (automotive)
MCS Modular Computer System (commercial)
MCT Mean Civil Twilight
MCU Mechanism Control Unit
MCU Modular Concept Unit
MCU Multipoint Control Unit
MCW Metal Casement Window
MDA Muscular-Dystrophy Association
MDC Motor Direct Connected
MDD Mission Data Display
MDF Main Distributing Frame
MDF Menu Definition File (commercial?; computer file extension; not duplicates)
MDI Marine Distributors Inc.
MDK Multimedia Developers Kit (commercial)
MDM Mathematical Dynamic Modeling
MDM Metal Dielectric Metal filter
MDM Mix-Down Monitors
MDR Master Dimensions Request
MDS Magnetic-Disk Subsystem
MDS Master Dimensions System
MDS Microsoft Developer Support (commercial)
MDS Multi-point Distribution System
MDT Mission Data Tape
MEA Middle-East Airlines, Airliban (company)
MEC Management Education Center
MEC Management Engineering College
MED Main Entry Door
MED Mechanical Equipment Description
MEF Maximum-Elevation Figures
MEL Mobile Environmental Laboratory
MEO Mid-Earth Orbit
MER Molecular-Electronics Research
MES Manufacturing Execution System
MET Multi-Emitter Transistor
MFB Master Flashing-Beacon
MFC Manual Frequency Control
MFE Manufacturing Feasibility Estimate
MFH Master of Fox-Hounds (degree)
MFI Multi-port Fuel-Injection (automotive fuel-injection)
MFK Multiple Function Keyboard
MFL Mono-Filament Line
MFM Modified Frequency-Modulation
MFN Most-Favored Nation
MFS Magazine Flooding and Sprinkling
MFS Marine Finish Slate
MFS Message Format Service
MFS Modern Fiction Studies
MFT Muscle-Function Test
MGC Mean Geometric Chord
MGD Miller Genuine Draft (commercial; alcoholic beverage)
MGG Memory Gate Generator
MGM Metro-Goldwin-Mayer (company)
MHA Manufactured-Housing Association
MHD Military Housing Directory
MHE Mechanical Handling Equipment
MHI Military History Institute (military)
MHN Mens' Health Network
MHP Minimum Holding Period (banking)
MHT Mean High Tide
MHW Mean High-Water
MIA Minimum IFR Altitude
MIC Man In Charge
MIC Motorcycle Industry Council
MID Master of Industrial Design (degree)
MIF Management Information File @ (other; not duplicates)
MIL Missile Integration Laboratory (military)
MIL Mother In-Law
MIP Management Information Protocol
MIP Minimum Impulse Pulse
MIR Mission In Rwanda
MIS Medical Information System
MIS Mis-Information System (joke; see DIS)
MIU Memory Interface Unit
MIU Message Injection Unit
MKC Morrison-Knudsen Comp. Ltd.
MLA Medical Library Association
MLA Music Library Association
MLC Memory Load Command
MLC Mortgage-Loan Corporation (banking)
MLE Martha Lake Electronics (company)
MLK Martin Luther King
MLP Metal Lath and Plaster
MLP Mod Line Planning
MLS Microwave Landing System (aircraft)
MLV Medium Launch Vehicle
MMA Money Management Account
MMA Plastics Molders And Manufacturers Association Of SME
MMD Mass Media Drives
MMF Memory-Mapped Files
MML Master Measurement List
MMM Mass-Memory Media
MMR Measles-Mumps-Rubella
MMT Mobile Maintenance Team
MNA Master of Nursing Administration (degree)
MNE Master of Nuclear Engineering (degree)
MOA Memorandum Of Agreement
MOC Magnetic Optic Converter
MOD Menasco Overhaul Division (company)
MOD Message Of the Day
MOE Measure Of Effectiveness
MOL Maintained Over-Load
MOM Manufacturer-Owned Machine
MOM MOA On a unit Manufacture assembly
MOR Maintenance Overhaul and Repair
MOS Magneto-Optical Storage
MOS Model Output Statistics
MOV Metal-Oxide Varistor
MOW Misery Of Work
MPA Maritime and Port Affairs
MPC Mapping and Photography Committee
MPC Military Personnel Center (military)
MPC Multiple Purpose Communications
MPD Maintenance Planning Document
MPD Mega-samples Per Day
MPD Miles Per Decade
MPE Multiple Programming Executive
MPH Manufacturer-Provided Hardware
MPH Mega-samples Per Hour
MPH Messages Per Hour
MPI Multi Purpose Interface
MPL Maintenance Parts List
MPM Maximum-Power Mode
MPM Mega-samples Per Minute
MPM Messages Per Month
MPM Multimedia Presentation Manager
MPP Message Processing Program
MPR Material Pickup Request
MPR Medium Power Relay
MPR Mono-Pulse RADAR
MPS Miles Per Second
MPT Male Pipe Thread
MPV Multi-Passenger Vehicle (not duplicates)
MPV Multi-Position Valve
MPW Markland Painting And Wallcovering (company)
MPY Mega-samples Per Year
MRA Minimum Reception Altitude
MRB Missile Review Board (military)
MRB Modification Review Board
MRC Machine Readable Code
MRD Main Readout Display
MRG Medium-Resolution Graphics
MRO Maintenance Repair operation
MRP Manufacturing Resources Planning
MRR Marine Resources Research
MRS Market-Rate Savings (commercial; banking)
MRS Material Returned to Stores
MRT Mildew Resistant Thread
MRU Mobile Radio Unit
MSA Microwave Switching Assembly
MSA Military Systems Applications
MSC Maintenance-Significant Component
MSC Miles Standard Cable
MSD Mapping Support Data
MSD Mauritius Survey Department
MSD Micro-Soft Diagnostics (commercial; which is correct?; not duplicates)
MSD Microsoft System Diagnostics (commercial; which is correct?; not duplicates)
MSD Missile Systems Division (military)
MSD Most-Significant Digit
MSE Master of Science in Engineering (degree)
MSG Miscellaneous Simulation Generation
MSH Melanocyte-Stimulating Hormone
MSI Medium-Scale Integration (not duplicates)
MSI Microsoft System Information (commercial)
MSL Microsoft Software Library (commercial)
MSM MIDI-Sequencer Module
MSN Microsoft Support Network (commercial; not duplicates)
MSO Multiple Systems Operators
MSP Media Studio Pro (commercial product)
MSP Micro-Soft Police (commercial)
MSS Maintenance Service System
MSS Master of Social Science (degree; not duplicates)
MSS Mechanical Systems Services
MST Mean Seek Time
MST Median Seek Time
MSU Message Switching Unit
MSX Midcourse Space eXperiment ('X' for 'experiment')
MTA Major Trading Areas (FCC)
MTA Multiple Terminal Access
MTC Manufacturer-To-Consumer (not duplicates)
MTC Manufacturer-To-Customer (not duplicates)
MTC Medium Time-Constant
MTC Mushroom-Tappet Camshaft
MTD Magnetic-Tape Drive
MTE Macintosh Terminal Emulator (commercial)
MTE Multisystem Test Equipment
MTF Manual Terrain Following
MTI Model Technology, Inc.
MTI Module Test Integration
MTM Manufacturer-Tested Machine
MTP Master Test Plan
MTR Material Return to Stores
MTS Map-Tracking System
MTS Message Transfer Service
MTS Microsoft Transaction Server (commercial)
MTT Maintenance Task Time
MTT Molecular-Target Technology
MTV Master of Tele-Vision (degree)
MTW Maximum Taxi Weight
MUD Multi User Dungeon (are three of these miscontrived?)
MUP Master of Urban Planning (degree)
MUS Machine Utilization System
MVD Motion Video Device
MVI Multi-Vendor Integration
MVP Methyl-Violet Paper
MVT Module Verification Test
MVT Multiprogramming with a Variable number of Tasks
MWC Mobile and Wireless Communication
MWE Mega-Watts Electrical
MWI Marketing World International (company)
MWP Maximum Working Pressure
MWT Mega-Watts Thermal
MXI Multisystem eXtension Interface ('X' for 'extension')
MYP Multi-Year Program
NAC N-Acetyl-Cysteine (chemical)
NAC Nation Air Canada
NAC Networking Architecture Consortium
NAE National Association of Evangelicals
NAF Naval Avionics Facility
NAH Not At Home
NAL National Agricultural Library
NAM Number Assignment Module (telephony; cellular)
NAP Normal Average Pressure
NAR National Association of Realtors
NAS National Advanced Systems
NAS National Air Space
NAS Network Access Server
NAS Numerical Aerodynamic Simulation
NAT Network Administration Tools
NBC National Barricade Company
NBD No Big Deal
NBN Nine-Bit Network
NBS New British Standard
NBS Nuclear Bomb Simulator (military)
NCC National Computer Company
NCC Neighborhood Christian Center
NCD Norton Change Directory (commercial)
NCF NetWare Command File (commercial; computer file extension; not duplicates)
NCF NetWare Command File @ (commercial; computer file extension; not duplicates)
NCL National Consumer League
NCO No-Contact Order
NCP Navigation Control Panel
NCP Network Control Program
NCP Northwest Corporate Park (real-estate)
NCR No-Current Relay
NCS Network Computer System
NCS No-Current Switch (not duplicates)
NCT NATO Comparative Testing
NCW No-Collar Worker
NDB Navigational Data-Base
NDD No Drinking/ Drugs
NDL Navy Dynamics Laboratory (military)
NDP National Data Pool
NDR Non-destructive Read-out
NDR Normal Bit-Rate
NDS The Netherlands Broadcasting System
NEA Nurse Education Act
NEF National Extra-Fine (thread)
NEF Noise Exposure Forecast
NET News Elimination Tool (?)
NFA No Fornicating Allowed
NFB Negative Feed-Back
NFF No Fault Found
NFL Nice Fucking Life @ (other; not duplicates)
NFM Narrow-band Frequency Modulation
NFR Not-For-Resale
NFR Notice of Financial Responsibility
NFV Net Future Value
NFW No Frigging Way (not duplicates)
NGC National Guard Computer (military)
NGR No Good Reason
NGS Navigation and Guidance Subsystem
NGT National Gateway Telecom
NGV Novice Gamblers, Veterans (dogs; NADAC)
NHD New Hacker's Dictionary (publication)
NHR Non-Hierarchical Routing
NIA Newspaper Institute of America
NIC National Industry Council (political)
NIC Network Interface Co-Processor
NIC Non-stop Inventory Control
NIM Network Installation Management
NIR Network Information Retrieval
NIR Non-Ionizing Radiation
NIS Network Information System (not duplicates)
NIS Networked Information System (not duplicates)
NIS Now In Service
NJA National Jogging Association
NLA Next Lower Assembly
NLC Navy Logistics Command (military)
NLG Nose Landing Gear
NLI Non-Living Issue
NLR Nazi Low-Riders
NLT Not Less Than
NLV National Language Version
NMC No-Minimum Checking
NMC Not Mission Capable
NMI Navy Material Instruction (military)
NMP Network Management Protocol
NMP Newton Message-Pad (commercial)
NMS Network Management System
NNI Network Node Interface (ATM)
NNS Navy News Service (military)
NOC Naval Operations Center
NOC Navy Ordnance Corps (military)
NOI Notice Of Inquiry
NOL Naval Ordnance Laboratory
NOR Notice Of Revision
NOV Net Original Value
NOW Number Of Words
NPA North-Pacific Area
NPC Named-Pipe Client
NPE North-Pacific Electric (company)
NPN Negative/ Positive/ Negative (semiconductor doping)
NPO Negative/ Positive/ Zero ('O' for 'zero'; VERY bad!)
NPR Noise Power Ratio
NPS Neutral-Pressure Switch
NPT Normal Pressure and Temperature
NQS Network Queuing System
NRA Non-Racist Association
NRC Natural Resource Conservation
NRC Nursing and Rehabilitation Center
NRE Non-Recoverable Engineering *
NRP Network Routing Product
NRS Northwest River Supplies (company)
NRT No Right-Turn
NSA Nail Spotting and Assembly
NSA National Standards Association
NSC Navy Systems Command (military)
NSE Navigation Speed Error
NSE Non-deliverable Support Equipment
NSG Non-Shrink Grout (architectural)
NSL Name-Server Lookup
NSP Native Signal Processing (commercial)
NSS National Super Service Co.
NSS No-Speed Switching (not duplicates)
NST Not Sooner Than
NSW New South Wales (Australia)
NTC Negative Temperature Co-efficient
NTI National Technical Information Service
NTL Navy Technology Laboratory (military)
NTO No Technical Objection
NTO Northern Theater of Operations
NTS Nano-Technology System
NTU Number of Transfer Units
NUI Network User Identification
NVG Night-Vision Goggle
NVS Navigational Video Select
NWC Naval Weapons Center, China Lake (not duplicates; military)
NWL Naval Weapons Laboratory (military)
NWL Non-Wings Level (aircraft)
NWO North-West Orient (company)
NWS Nose Wheel Steering
NYC New York Central
OAA Hereditary Order of Armigerous Augustans *
OAA Old-Age Assistance
OAA Optical Acquisition Aid
OAA Outstanding-Achievement Award
OAB Operational Advisory Broadcasts
OAB Organisation Africaine du Bois (language?)
OAB Oxford Annotated Bible
OAC Office of the Administrator for the Court
OAC Operation of Aircraft Costs
OAC Overseas Automotive Club
OAD Offshore-Accident Databank
OAD Operational Availability Data
OAD Original Air Date
OAE Optical Alignment Equipment
OAE Orbiting Astronomical Explorer
OAE Orzeck Aphasia Evaluation
OAF Options for Animals Foundation
OAG Official Airline Guide
OAH Ovarian Androgenic Hyper-function
OAH Overhead Air-Hoist
OAI Optical Associates Inc.
OAM Operation And Maintenance (ATM)
OAR Ocean Atmosphere Research Experiment
OAS Obsolete And Surplus
OAS Offensive Avionics System
OAS Organization of American States
OBA Octave-Band Analyzer
OBE Outer-Back End
OBH One-Base Hit
OBO Or Best Offer
OCA Oceanic Control Area
occ Online Career Center @ (not duplicates; both are used; internet URL)
OCC Other Common Carrier
OCE Ocean-Circulation Experiment
OCL Operation Control Language (not duplicates)
OCP On-line Complex Processing
OCP Operational Control Procedure
OCR Operation Control Reports
OCS On-Card Sequencer
OCX OLE Custom Control ('X' for 'control')
ODB Output Data Buffer
ODC Operational Discrete Command
ODI Open Design Issues
ODP Operational Development Phase
ODS Operational Discrete Status
ODT Outside Diameter Tube
OEE Overall Equipment Effectiveness
OEO Office of Economic Opportunity
OFB Orange Flashing-Beacon
OFF Object File Format
OFP Operational Flight Program
OFS One-Finger Salute
OGE Operational Ground Equipment
OGE Out-of Ground-Effect
OGM Oil, Gas, Mining
OGW Overload Gross Weight
OHP Omni-directional Holonomic Platform
OIC On-line Interactive Course
OIC Optical Interface Controller
OIM Open Information Management
OIP Optical-Illusion Phenomenon
OLC Olympia Lighting Center (company; Washington)
OLL Over-Load Limiter (not duplicates)
OLP Off-Line Planning
OLS On-Line Services
OLS Order Location System (not duplicates)
OMB One-to-Many Broadcast
OMF Open Media Framework
OMG Observer Mission in Georgia, USSR
OMI Open Modeling Interface
OMR Optical Mark Recognition (not duplicates)
OMS Ozone-Mapping Spectrometer
OMU Operational Mock-Up
ONF Old North French
ONR Office of Naval Research
ONV Open-Neutral Valve
OOA Object-Oriented Analysis
OOD Object-Oriented Database
OOI Office Of Investigations
OOO Out-Of-Order
OOS Off-line Operating Simulator
OPA Office of Price Administration
OPC Optical Photo-Conductor (redundant?)
OPD Operations Per Decade
OPI Optical Polymers International (company)
OPL Outside Production Line
OPM Operations Performance Metric
OPR Overhead Performance Reporting
OPS One-Pole Switch
OPS Oriented Poly-Styrene (chemical; plastic)
OPT Open Protocol Technology
OPW Operations Per Week
OQS cave One, Qumran, Serekh ha-Yahad
ORC Officers' Reserve Corps (military)
ORD Optical Rotary Dispersion
ORI Occupational Rehabilitation, Incorporated
ORI Operational Readiness Inspection
ORT Operationally Ready Time
OSA Olefin-modified Styrene Acrylonitrile (chemical; plastic)
OSA Open Systems Architecture
OSC Operating-System Company
OSD Office of the Secretary of Defense (military)
OSE Operating System-Environment
OSI Office of Special Investigation
OSI Option Specification Instance
OSM On-Screen Manager
OSM On-Site Maintenance
OSP Oil Suction Pump (not duplicates)
OSQ Object-Structured Query
OSR Operational Scanning Recognition
OSS On-Site Service
OSS Operations Support Systems
OST On-Shore Technology (see OST above; unfortunate ambiguousity)
OTA Operation Triggered Architecture
OTB On The Blink
OTC Owatonna Tool Company
OTD Optical Time-Domain
OTG Order To Go
OTL Operational Test Launch
OTL Operational Training Launch
OTP Open Transport Protocol
OTR Occupational Therapist Registered (degree)
OTS On-line Teleprocessing System
OTT Office of Travel and Transportation (not duplicates)
OTT Over The Top (see UTT)
OUI Otherwise Un-Identified
OUS Office User Specialist
OVP Office of the Vice-President
OWA Ontario World-Air, Ltd.
OWB Orange Warning-Beacon
OWU Open Window Unit (acoustics)
OWV One-Way Valve
P4L PAPI, Four lights on Left (aircraft)
PAB Personal Address-Book
PAB Personnel Appeals Board
PAC Pitch Augmentation Computer
PAC Planning And Control
PAC Public-Access Computer
PAD Primary Access Display
PAD Programmable Automation Data
PAG Poly-Alkylene Glycol (chemical; oil)
PAG Poly-Alkylene Glycol (oil)
PAI Pregnancy After Infertility
PAL Precision Audio Link
PAL Prescribed Action Link
PAM Piss And Moan
PAM Pulse-Amplitude Modulation
PAP Password-Authentication Protocol
PAP Pulmonary Artery Pressure
PAR Parts Availability Review
PAR Professional Auto-Racing
PAR Program Action Request
PAS Peregrine Air Services, Ltd.-Scotland
PAT Pelican Air Transport, Ltd.
PAT Physical Acceptance Test
PAV Position And Velocity
PAW Pratt And Whitney
PBC Parts Breakdown Catalog
PBF Parents, Brothers, and Friends (company)
PBF Pregnancy After Fertility (joke)
PBM Power-plant Buildup Manual
PBR Pylon, Beam, and Rack
PBS Power Bench Seat (automotive)
PCA Pentagon Communications Agency
PCA Physical Configuration Audit
PCA Power Controller Assembly
PCB Plain Cipher Block
PCB Poly-Chlorinated Biphenyl (chemical; oil; poison)
PCC Panel Components Corporation
PCC Poison Control Center
PCD Photo Compact-Disc (computer file extension; not duplicates)
PCD Product Configuration Definition
PCF Process Control File
PCI Peripheral Command Indicator
PCI Physical Configuration Identification
PCL Phoenix Container Liners (company)
PCL Post Conference List
PCM Parametric Cost Model
PCM Phase Control Module
PCM Pour Cent Mille (unit of nuclear radiation)
PCM Program Control Matrix
PCM Project Certification Manager
PCN Production Change Number
PCO Poly-Cystic Ovaries
PCO Production Control Operation
PCP Power Control Panel
PCP Previous Code Page
PCR Plot Composition Request
PCR Project Cost Report
PCS Pacific Climate Study (MSA)
PCS Physical Control Space
PCS Plotting Control System
PCS Process Control System
PCS Production Control Support
PCS Program-Counter Store
PCU Portable Control Unit
PCU Power Conditioning Unit
PCW Personal-Computer World (publication)
PDA Physical Device Address
PDB Para-Dichloro-Benzine (chemical)
PDB Product Data-Base
PDB Product Development Building
PDC Pre-Departure Clearance
PDC Proteus Digital Channel
PDD Plumbing and Deck Drain
PDF Polycrystaline Diamond Film
PDF Portable Document Format (computer file extension; not duplicates)
PDF Program Development Facility
PDI Personal Data Interchange
PDI Product Definition Integration
PDL Pay-Day Loan
PDL Permanent Data-Link
PDM Programmed Depot Maintenance
PDN Public Data Network
PDP Policy Development and Planning
PDQ Pretty Damned Quickly (acceptable grammar)
PDQ Pretty Darned Quickly (acceptable grammar)
PDR Pre-Determined Route
PDR Program Design Review
PDR Publications Discrepancy Report
PDS Portable Document Software
PDS Post-Development Support
PDS Program Design Specification
PDT Page Deallocation Table
PDT Product-Development Team
PDU Protocol Data Unit
PDX Printer Description Extension @ (other; not duplicates)
PED Planning and Engineering Department
PEG Photographic Experts Group
PEG Program Evaluation Group
PEL Purchased Equipment List
PEM Privacy-Enhanced Mail
PEP Peak Envelope Power
PEP Pump Exit Pressure
PER Part Evaluation Record
PES Production Engineering Services
PET Point of Equal Time
PET Production Environmental Tests
PFB Printer Font Binary (computer file extension; not duplicates)
PFB Purple Flashing-Beacon
PFC Primary Flight Control (not duplicates)
PFD Personal Floatation Device
PFD Planned Flight Data
PFE Programmers' File Editor (commercial?)
PFI Post Flight Inspection
PFP Pay For Performance
PFR Planning For Rate
PFS Power-Failure Sensor
PFT Programmed Flying Training
PFT Pure Flat Tube (commercial?)
PGC Plant-Growth Chamber
PGM Piston-Generator-Motor
PGZ Predicted Ground Zero
PHI Position Homing Indicator
PHS Public Health Service
PHT Packaging, Handling, and Transportability
PIA Peripheral Interface Adapter
PIB Poly-Iso-Butylene (chemical; plastic)
PIB Pulse Interference Blanker
PIC Personal Information Carrier
PIC Pilot In Command
PIC Priority Interrupt Controller
PID Preflight Insertion Data
PIH Public Internet Host
PII Procurement Instruction Identification
PIM Personal Information Manager
PIN Physician Identification Number
PIN Precision Information Network (commercial)
PIO Processor Input-Output
PIO Program Input-Output (not duplicates)
PIO Programmed Input-Output (not duplicates)
PIP Processor Input Port
PIR Passive Infra-Red
PIR Phoenix International Raceway (commercial)
PIT Phoenix Institute of Technology
PIT Pilot In Training
PJA Patriotic Justice in America
PL1 Programming Language/ One (commercial)
PLA Production-Line Automation
PLD Plans, Logs, and Data Document
PLD Power and Lighting Distribution
PLL Phase-Locked Loop
PLO Palestine Liberation Organization
PLP Presentation Level Protocol
PMA Part Manufacturing Authorization
PMA Pencil Makers Association
PMC Permanent Magnet Computer
PMD Perpetual-Motion Device
PMD Preventive Maintenance Daily
PME Portable Mechanical Equipment
PME Precision Measuring Equipment
PMI Permanent Manufacturing Information
PMI Protected-Mode Interface
PML Princeton Microfiche Library
PMP P Modification Program
PMP Poly-Methyl-Pentane (chemical; plastic)
PMR Performance Management Review
PMS Power-Management Software
PMS Product-Management Software
PMU Plaster Mock-Up
PMU Portable Memory-Unit
PNE Palestine and the Near East
PNL Passive Network Library (commercial)
PNM PN Merpati Nusantara Airlines (company)
PNR Point of No Return (see PKR)
PNS Part Number Summary
POA Percent Open Area
POB Place Of Birth
POB Private Office Building
POC Point Of Continuity
POC Point Of Curve
POD Payment On Death (not duplicates)
POD Polycystic Ovary Disease
POD Post-Office Department
POE Point Of Embarkation
POE Port Of Embarkation
POI Point Of Interest
POL Petroleum, Oils, and Lubricants
POM Power-Off Mode (an excellent example of ambiguous TLAs!)
POO Port Of Olympia
POP Point Of Purchase
POR Privately-Owned Resources
POS Pile Of Shit (not duplicates)
POS Point Of Sale
POV Peak Operating Voltage
POV Persistence Of Vision (computer file extension; not duplicates)
POW Power Of Work
PPA Pollution Prevention Act
PPA Program Procurement Authority
PPC Pre-release Part Card
PPC Present Position Correction
PPD PostScript Printer Description (commercial?; computer file extension; not duplicates)
PPD Pulses Per Day
PPD Pulses Per Decade
PPI Peer-to-Peer Internetworking
PPI Pixels Per Inch
PPI Programmable Peripheral Interface
PPM Pounds Per Month
PPM Pulse Position Modulation
PPO Prior Permission Only
PPP Pollution Prevention Plan
PPS Pad Perimeter Shelter
PPS Pounds Per Second
PPT Portable and Precision Tool
PPT Programs Process review Team
PPV Prairie Park Vista (real-estate)
PQT Preliminary Qualification Test
PRA Popular Rotorcraft Association
PRC Part Release Card
PRC Planned Residential Community
PRC Pulse Repetition Cards
PRF Pulse Repetition Frequency
PRF Pulse-Rate Frequency
PRK Photo-Refractive Keratectomy
PRL Physical Review Letters (publication)
PRM Pulse-Rate Modulation
PRP Personal Restraint Petition
PRP Pressure Recording Process
PRR Pulse Repetition Rate
PRS Planned-Response System
PRT Photo Template Requisition
PS2 Personal-System Two (commercial)
PSA Pacific Southwest Airlines, Inc.
PSB Page-Select Bit (computer)
PSC Pacific Science Center
PSC Personal Super Computer
PSD Packet-Switched Data
PSD Program Storage Device
PSD Programmable System Device
PSE Project Support Environment
PSI Packet-Switch Interface (telephony)
PSI Pre-Sentence Investigation
PSI Professional Ski Instructor
PSM Play-Station Magazine (publication)
PSM Printing Systems Manager
PSN Program Sequence Number
PSP Pierced Steel Plank
PSP Program-Segment Prefix
PSR Power-Supply Reset
PSS Portable Shearography System
PSS Process and System Strategy
PSW Pacific South-West
PTA Parent-Teacher Association
PTA Programmable Test Adapter
PTC Phen-Tio-Carbamine (chemical)
PTD Parallel Transfer Disk Drive
PTE Planned Time En-route
PTF Problem Temporary Fix (not duplicates)
PTI Pad-Tech Industries (company)
PTL Praise The Lord
PTL Projects and Technology, Ltd.
PTO Power Take-Off
PTR Part Transfer Request
PTR Photo Template Requisition
PTS Pacific Test Site
PTS Post-Testicular System
PTT Post, Telegraph, Telephone (includes telephony)
PTV Performance Test Vehicle
PUD Public Utility District
PUP PARC Universal Packet (protocol)
PUS Peaceful Uses of Space
PVC Poly-Vinyl Chloride (chemical; plastic)
PVD Planned Video Display
PVI Pilot Vehicle Interface
PVS Parallel Visualization Server
PVT Pinole Valley Trucking (company)
PWA Project Work Authorization (not duplicates)
PWB Programmers Work Bench (commercial)
PWC Professional Window Cleaner (not duplicates)
PWD Predicted Wind Data
PWD Pulse-Width Decoder
PWO Paper Work Only
PWP Pacific Western Pipe (company)
PWS Poison-Wire System
PWU Part Where Used
PZM Pressure-Zone Microphone (commercial)
QAA Quality Assurance Audit
QAB Queen Anne's Bounty
QAC Quality Assurance Coordinator
QAC Quality Assurance Professional
QAC Quebec Appeal Cases
QAD Quick Attach-Detach
QAE Quality Assurance Engineering
QAH Quick Airways Holland BV (company)
QAK Quick-Attach Kit
QAL Quarterly Accession List
QAM Queued Access Method
QAO Quality Assurance Office (not duplicates)
QAP Quality Assurance Program (not duplicates)
QAP Quanah, Acme and Pacific Railway Co.
QAR Quality Assurance Record
QAS Quality Assurance Service
QAS Quisqueya Airlines SA (company)
QAT Quality Assurance Technical
QBA Queensland Barristers' Board
QBD Queen's Bench Division (not duplicates)
QBD Queen's Bench Division, Law Reports (publication; not duplicates)
QBO Quarterly Business Outlook (publication)
QBP Queen's Bishop's Pawn
QCD Quantum Chromo-Dynamics
QCR Quality Control Reliability
QCR Quantity Control Records
QDM Quality Debris Monitor
QDS Quality Data record System (not duplicates)
QDS Quality Data Systems (not duplicates)
QDS Quick and Dirty System
QEI Quod Erat Inveniendum (Latin)
QGS Quality Grading System
QIC Query by Image Content (commercial?)
QIS Quality Improvement Story
QJR Quality Jewelry Repair (sure, but WHAT quality?)
QMC Quarter-Master Corps (military)
QMS Quality Micro Systems (company)
QMW Queen Mary and Westfield College
QOR Qualitative Operational Requirement
QOR Quantum Optical Research
QPP Quantized Pulse Position
QPT Quantity Per Task
QRA Quality Reliability Assurance
QRS Qualitative Reasoning System
QRT Quick Response Team
QSL Qualifications and Standards Laboratory
QSO Quasi-Stellar Object
QSS Quality Surveillance System
QTB Quarry Tile Base
QTL Quantitative Trait Locus
QTP Quality Test Plan
R0L Return to Zero Level
RAA Records And Accountability
RAA Royal Australian Air-Force (military)
RAC Regent Air Corp.
RAC Resource Access Control
RAD Rapid Application Development (duplicates?)
RAD Routing Arbiter Data
RAI Receive And Inspect (not duplicates)
RAL Remote Analog Loopback
RAM Radiation Attenuation Measurement
RAN Radio Aids to Navigation
RAP Relational Analytical Processing
RAP Responsible Atmospheric Policy
RAS RADAR Absorption Structure
RAS Reliability, Availability and Serviceability
RAT Radio Amateur Telecommunications
RAV Remote Autonomous Vehicle
RBA Request-Broker Architecture
RBC Royal Bank of Canada (company)
RBE Relative Biological Effectiveness
RBT Requirements-Based Testing
RCC Rainier Cable Commission *
RCC Rescue-Coordination Center
RCF Realtime Compression Format
RCF Remote Communication Facility
RCI Realtime Compression Interface
RCM Recommend Cruise Mach
RCO Remote Communications Outlet
RCP Remote-Control Preprocessor (microcontroller)
RCP Royal College of Physicians
RCS Red-Carpet Service
RCS Royal College of Surgeons
RCT Red-Carpet Treatment
RDA Remote Data-Acquisition
RDB Receive Data Buffer
RDC RF Down Converter
RDF Resource Description Framework
RDG Resolver Differential Generator
RDM Recording Demand Meter
RDO Research and Development Objectives
RDR Request for Document Revision
RDS Remote Data Service
RDS Resistance, Drain to Source
REA Real-Estate Appraiser
REA Rear-End Alignment
REE Responsible Equipment Engineer
REL Rescue Equipment Locker
REM Roentgen Equivalent in Man (duplicates?)
REO Repair Estimate Order
REP Range Error Probability
RET Real-Enough Time
RFA Radio Frequency Authorization
RFA Request For Analysis
RFC Request For Commitment
RFC Resident Fabrication Control
RFE Request For Estimate
RFH Request For Heat
RFL Real Freaking Loud (not duplicates)
RFP Reduced-Fare Pass
RFP Request For Processing
RFS Radio Frequency Surveillance
RFS Remote File Sharing
RFT Radio Frequency Transmitter (not duplicates)
RGA Range to Go to missile Altimeter turn on
RGR Residential Garbage Route
RGT Resonant Gate Transistor
RHI Range Height Indicator
RHR Roughness Height Rating
RHS Regional Heart-Study
RIB Right In-Board
RIC Residential Industrial Commercial
RID Request for Inspection Data
RIL Repairable Item List
RIM RADAR Input Mapper
RIP Raster Image Processor
RIP Remote Imaging Protocol
RIP Ring-Index Pointer
RIS Radon Information Service (not duplicates)
RIS Rocket Information Services (commercial; mine)
RIS Rowland Institute For Science
RIU RADAR Input Unit
RIV Radio Influence Voltage
RLA Rechargeable Lead-Acid
RLA Rotary Launcher Assembly
RLD RADAR Laydown Delivery
RLG Refrigerated Liquefied Gas
RLR Resolver Library Routines
RLU RADAR Logic Unit
RMA Rate Monotonic Analysis
RMA Royal Marine Artillery (military)
RMC Regional Medical Center
RMC Royal Military College
RMM Read-Mostly Memory
RMO Risk Management Organization
RMS [square] Root [of the] Mean [of the sum of the] Square[s]
RMS Resources Monitor-Scheduler
RMU RADAR Memory-Unit
RMV Retired Military Veteran
RNC R and N Cargo (company)
RNG Random-Number Generator
RNS Real Name System
RNS Royal Naval Service
ROC Rate Of Climb
ROC Required for Operational Capability
ROD Richmond Over-Drive (commercial)
ROH Rear Of House (usually BOH; see FOH, BOH)
ROJ Range On Jamming
ROM Resident-Operator Memory (contrived?)
ROP Rear Observation-Post
ROS Reactive Oxygen Species
ROS Return On Sales
ROT Reign Of Terror (music; not duplicates)
RPA RADAR Performance Analyzer
RPC Remote Position Control
RPC Revolutions Per Century
RPD Repetitions Per Day
RPG Raster Pattern Generator
RPI RADAR Precipitation Integrator
RPL Recognition of Prior Learning (Australian)
RPM Rapid Performance Multimedia
RPM Reflections Per Month
RPM Replacement Parts Manufacturing
RPP Receive Personality PROM
RPR Relative Performance Rating
RPS Remote Power-Supply
RPS Revolutions Per Second
RPT Resident Provisioning Team
RPW Repetitions Per Week
RQC RADAR Quality Control
RRB Railway Retirement Board
RRB Retrofit Review Board
RRD Rural-Route Delivery
RRO Reports Receiving Office
RRR Resource Requirements and Reporting
RRT RADAR Receiver-Transmitter
RRT Requirements Review Team
RSA RADAR Service Area
RSC RADAR Scan Converter
RSC Remote Sensing Center
RSD Received Signal Detected
RSD Rolling Steel Door
RSG Raster Symbol Generator
RSM Remote Server Management
RSO Requirements Schedule and Ordering system
RSP Remote Sequenced Packet
RSP Requirements Summation Program
RSS Root Sum of Square
RSV Retired Senior Volunteer
RTA Ready To Assemble
RTA Retail Traders Association (Australian)
RTA Right Trim Arm
RTC Real-Time Clock
RTC Rural Training Council
RTD Real-Time Data
RTE Real-Time Environment
RTE Run-Time Environment
RTI RADAR Target Indicator
RTL Reinforced Tile Lintel
RTL Run Time Library
RTM Resin-Transfer Molding (plastics)
RTM Routing Table Maintenance
RTO Responsible Test Organization
RTS Radio and Television Service
RTS Reflections Training Systems, Inc.
RTS Return to Service
RTU Re-Training Unit
RTV Return To Vendor
RUM RADAR Unit Mount
RVA Reactive Volt-Ampere Meter
RVR Runway Visual Range
RWA Rear-Wheel Alignment
RWC Rain-Water Conductor
RWS Range-While-Search
RWW Rear Wheel-Well
RWX Read-Write-eXecute ('X' for 'execute')
RZP Polarized Return-to-Zero
S4C Stereo Four-track Cartridge
SAA Safe And Arm
SAA Spectrum-Analyzer Adapter
SAB Special American Business
SAC Satellite-Access Card
SAC Simple Analog Channel
SAC Superseding And Canceling
SAD Service Advertising Protocol
SAD Standard American Diet (see HAD, SAD above)
SAF Short And Fat
SAF Single Asian Female ('singles' advertising)
SAG Single Asian God ('singles' advertising)
SAG Stock-Abbreviation Guide
SAH Servicio Aereo de Honduras (Honduran; company)
SAI Suburban Area Interface
SAI Symbolic Automatic Integrator
SAM Selective Automatic Monitoring
SAM Single Asian Mom (or Mother; 'singles' advertising)
SAM Spares Affected Memorandum
SAM System Administration Manager
SAN Single Account-Number
SAP Safety Awareness Program
SAP Service Advertising Protocol
SAP Speech Application Program
SAP Systems, Applications and Products (company)
SAR Search And Rescue
SAR Storage Address Register
SAR Subsequent Application Review
SAS Sales Accounting System
SAS Small Astronomy Satellite
SAS Stability Augmentation System
SAS System And Service
SAT Site Activation Team
SAT Static Air Temperature
SAU See And Use
SAW Save A Whale
SBC Single-Board Computer
SBE School of Business and Economics
SBE Society of Broadcast Engineers
SBG Single Black God ('singles' advertising)
SBH Sequencing By Hybridization
SBL South-Bound Lane
SBN Standard Book Number
SBP Sound Blaster Pro (commercial)
SBS Scandinavian Brake Systems (company)
SBS Shaken-Baby Syndrome
SBU Silver Brazing Union
SCA SCSI Configuration Automatically
SCA Shuttle Carrier Aircraft ('STS' is NOT 'shuttle'!)
SCA Subsidiary Communications Authorization (duplicates; which is correct?) *
SCC Scalable Cluster of CISC
SCC Specialized Common Carrier
SCC State Corporation Commission
SCC System-Cooling Coils
SCD Single Chinese Dad ('singles' advertising)
SCD System Configuration Data
SCF Single Chinese Female ('singles' advertising)
SCF Single Christian Father ('singles' advertising)
SCG Security Classification Guide
SCG Single Christian Goddess ('singles' advertising)
SCI System Configuration Item
SCM Service Committee Meeting
SCM Single Chinese Mom (or Mother; 'singles' advertising)
SCM Spoiler Control Module
SCM Subscriber Carrier Module (telephony)
SCO Special Compartmental Information
SCP Set Clearance Plane
SCP Signal Control Point
SCP Stereo-Cassette Player
SCP Supplier Change Proposal
SCR Silicon Controlled Rectifier
SCR System Change Record
SCS Schedule Commitment Summary
SCS Single Channel Simplex
SCS Stock Control System
SCT State-Certified Treatment
SCU Servo Control Unit
SCU Signal Conditioning Unit
SCU System Control Unit
SDA Satellite Dealer Association (NASA has competition?)
SDB Safe Deposit Box
SDC Single-Disc Clutch (automotive)
SDC Spares Distribution Center
SDC Strategic Defense Command (military)
SDD Single-Density Drive (not duplicates)
SDF Self-Defense Force
SDF Standard Data Format @ (other; not duplicates)
SDG Status Display Generator
SDI Software Development Interface (commercial?)
SDL Significant Difference List
SDM SCSI Device Management
SDM Speaker Drive Module
SDM System Development Multitasking
SDN System Development Notification
SDR Serial Data Register
SDR Supplier Data Requirement
SDS Shop Distribution Stock
SDS Space Defense System (military)
SDS Sysops Distribution System
SDU Satellite Data Unit
SDU SECAL Decoder Unit
SDU System Display Unit
SDX Satellite Data eXchange ('X' for 'exchange')
SEB Starboard Equipment-Bay
SEC Spoiler Elevator Computer
SEC Stereo Eight-track Cartridge
SED Single-Ended Driver
SEE Serial Electrically-Erasable
SEH Shin Etsu Handotai (company)
SEI Sykes Enterprises Incorporated
SEJ Sliding Expansion Joint
SEL Sound Exposure Level
SEM Sensor Emitter Manager
SEP Star Epitaxial Planar
SER Stop End of Runway
SER Subcontractor Engineering Review
SES Service Evaluation System
SET Secure Electronic-Transaction
SEU Saint Edward's University
SFA Scottish Football Association
SFB Solid Fiber-Board
SFC Stereo Four-track Cartridge
SFF Small Form-Factor
SFL Sequenced Flashing Lights
SFL Soft-Field Landing (aircraft)
SFL Soft-Field Landing
SFR Special-Function Register (see SPR)
SFT System Fault Tolerance
SGL Serendipity Group of Lander, Wyoming
SGM Society for General Microbiology
SGS Strategy Gaming Society
SHA System Hazard Analysis
SHC Simulation Host Computer
SHF Single Hispanic Female ('singles' advertising)
SHF Super-High Frequency
SHG Single Hispanic God ('singles' advertising)
SHO State Highways Officials
SHS Serrano High School
SIA Semiconductor Industry Association
SIA Special Instrument Arrival
SIA Standard Instrument Approach
SIC Scientific Information Center
SIC Subsystem Integration Concept
SID Single Italian Dad ('singles' advertising)
SID Special Instrument Departure
SID System Interconnect Diagram
SIF Single Italian Father ('singles' advertising)
SII Standard Interface Item
SIL Single In-Line
SIL Surface Information Letter
SIM System Integrated Memory
SIO System Input-Output
SIP Single-Inline Package
SIP System Integration Program
SIR Seattle International Raceway (commercial; Washington)
SIS Science Institutions and Scientists
SIS Small Island States
SIS Standard Instruction Set
SIT Special Information Tones
SIT System Integration Test
SIW Short Instruction Word
SJG Single Japanese God ('singles' advertising)
SJM Single Jewish Mom (or Mother; 'singles' advertising)
SKN Stock-Keeping Number
SLA Source of Legal Authority
SLC Side Lobe Cancellation
SLD Sea-Level Data
SLG Single-wheel Landing Gear
SLI Serial-Line Interface
SLM Ship-Launched Missile (military)
SLP Speech Language Pathologist
SLP Speed Limiting Point
SLS Sea Level Static
SLS Seville Luxury Sedan (motor vehicle; commercial)
SLT Sea-Level Trends
SLU Station Logic Unit
SLV Single-Layer Varistor
SMA Shape-Memory Alloy
SMA Surplus Marketing Administration
SMC Saint Martin's College
SMC Surface Mount Component
SMC System Management and Control
SMD Surface-Mounted Device
SME Shipping Mechanical Equipment
SMI Seattle Manufacturing Inc.
SML Segregated Memory-Location
SML Support Materials List
SMO Supply Management Office
SMP Saint Martin's Pavilion
SMP Symmetric Multi-Processor (not duplicates; see AMP)
SMS Sewing-Machine Service (company)
SMS Sun Moon Star (company)
SMS Surface Mountable Semiconductors
SMT Surface-Mount Technology
SMX Smithway Motor eXpress (company; 'X' for 'express'; details uncertain)
SNB Skip if Not Bit (instruction)
SNI Sequence Number Indicator
SNS Secure News Server
SOA Spirit Of America (race vehicle)
SOB Son Of a Bitch
SOB Start Of Break
SOC Special-Operations Command (military)
SOD Serial Output Data (register)
SOD Spirit Of Darkness
SOD Winner Of the Day
SOD Winner Of the Decade
SOE Standard Operating-Environment
SOG Small-Outline Gullwing
SOI Silicon-On-Insulator
SOI Space Object Identification
SOL Sound Of London
SOM Single Oriental Mom (or Mother; 'singles' advertising)
SOM Son Of Man
SOO Ship Of Opportunity
SOP Scavenging Oil Pump
SOP Start Of Page
SOS Save Our Schools
SOS Scrub-O-Sphere (company)
SOS Small-Office System
SOS Start Of Shift
SOV Shut-Off Valve
SPA Secure Password Authorization (incorrect)
SPA South-Pacific Area
SPB Split-Phase Bipolar
SPC Single-Phase Condition
SPC South Pacific Island Group, New Caledonia
SPD Samples Per Day
SPD Seconds Per Day
SPD Special Purpose Display
SPE Seller Procured Equipment
SPE System Performance Evaluation
SPF Solar Protection Factor (incorrect; common miscontrivance)
SPG SPICE-Poon, Gummel (commercial)
SPH Samples Per Hour
SPI Service-Provider Interface
SPI Shop Procured Item
SPL Sound-Pressure Level
SPM Seconds Per Month
SPM Shots Per Minute
SPM Surface Position Monitor
SPN Short Part-Number
SPP Signal-Processing Package
SPR Single-Phase Relay
SPR Society for Physical Research
SPR Supplier Problem Report
SPS Secondary Power-System
SPS Single-Port Storage
SPS Standard Pressed Steel (company)
SPT Spare Parts Terminal
SPU Seattle Pacific University (Washington)
SPX Stack-Pointer, eXtended (register; 'X' for 'extended')
SQS Synchronous Quiet Switch
SRA Scientific Research Associates
SRA System Review and Approval
SRB Safety Review Board
SRC Spares Release Card
SRD Software Requirements Definition
SRD Steel Rule Die
SRF Self-Resonant Frequency
SRF Shop Relevant Fault
SRI System Requirements and Implementations
SRO System Requirements Objective
SRP Selected Reference Point
SRP Synthetic-Rubber Product (not duplicates)
SRP Synthetic-Rubber Production (not duplicates)
SRR Serially Reusable Resource
SRS Software Requirements Specification
SRT Storage Reduction Technique
SRU Shop Repairable Unit
SS2 Shift-Solenoid Two
SSA Secured Systems Access
SSA System Support Array
SSC Self-Service Copy
SSC Senate Select Committee
SSC Source Selection Criteria
SSC South-Sound Center (real-estate)
SSC System Service Control
SSD Social Services Division (not duplicates)
SSD Sports Science Division
SSD Supplier Shipping Document
SSD Systems and Services Development
SSE Store Safety Equipment
SSG Supporting Subsystem Group
SSI SCSI Serial Interface
SSI Single System Image
SSI Small-Scale Integrated circuit (not duplicates)
SSI Small-Scale Integration (not duplicates)
SSL Semantics and Specifications Language
SSM Surface-to-Surface Missile (military)
SSN Standard Serial Number
SSP Security Service Provider
SSP Sensor Simulation Processor
SSR Slate-Shingle Roof
SSR Systems Safety Review
SSS Seattle Support Services (Washington)
SSS Silicon Symmetrical Switch
SSS Spread Spectrum System
SSS System Simulator Software
SST Standard System Technology
SSU Sub-System Unit
SSW South South-West (on compass rose)
STA SA de Transport Aerien (company)*
STB Bachelor of Sacred Theology (degree)
STC Single-Track Course
STC Stereo-Tape Cartridge
STC Supplemental-Type Certification
STD Secondary Transmit Data
STD Stereo-Tape Deck
STE Signature Time Engineering (commercial)
STG Self-Teaching Guide
STL Licentiate in Sacred Theology (degree)
STL Space Technology Laboratories, Inc.
STM Set Transfer-Mode
STP Scientifically Treated Petroleum (commercial; the original STP)
STP Shielded Twisted Pair
STP Situation Target Proposal
STP Stereo-Tape Player
STR Scheduled Time of Arrival
STS Service Technicians' Society
STS Specialty Training Standards
STS Surfaced Two Side
STS System Status
STU Special Test Unit
SUC State Unemployment Compensation
SUM System check and Utility Master
SUM System User Manual
SUS Signal Underwater Sound
SVA Stator Vane Actuator
SVD Software Verification Document
SVN Switched Virtual Network
SVP Senior Volunteer Program
SVR System V Release (commercial)
SVT Special-Vehicle Team (Ford)
SWC Second World Country
SWD Solid-Waste Division
SWD Sonic Wave Disks (commercial)
SWF Single White Female ('singles' advertising)
SWG Square-Wave Generator
SWL Single-Wheel Landing (aircraft)
SWP Sea Water Pump
SWP Spirally-Wound Pair
SWP Storm-Water Pollution
SWU Solid-Waste Utility
SYM Single Yellow Mom (or Mother; 'singles' advertising)
T3G Technician, Third Grade
TAA Tactical Air Army (military)
TAA Tactical Army Automation (military)
TAA Technology Assessment Advisory
TAA Territorial Army Association (military)
TAA Ticket Agents' Association (UK)
TAA Tobacconists' Association of America
TAA Total Active Aircraft
TAA Trade Adjustment Assistance
TAA Transportation Association of America
TAA Turbine Alternator Assembly
TAA Turkish-American Associations
TAA Typical Address Access
TAC Technical Applications Conference
TAC Total-Access Communications
TAD Technical Approval Demonstration
TAD Technology Availability Date
TAD Transmission And Distribution
TAF The Access Fund
TAH Test And Handling
TAH Total Abdominal Hysterectomy
TAH Trans-Avia Holland
TAL Thai Airways Co., Ltd.
TAM Transfer Alignment Maneuver
TAP Throttle Angle Position
TAP Time And Percussion
TAP Toxicological Agents Protective (suit)
TAR Test Accuracy Ratio
TAS Test Adapter Set
TAT Time After Time
TAT True Air Temperature
TAT Turn Around Time
TBA To Be Arranged
TBC Toss Bomb Computer (military)
TBI Target Bearing Indicator
TBI Throttle-Body Injection (automotive fuel-injection)
TBI Traumatic Brain-Injury
TBM Time Between Maintenance (not duplicates)
TBR Two Bed-Room
TBV To Be Verified
TCA Terminal Control Area
TCB Thermal Circuit Breaker
TCC Thurston County Code
TCD Temporary Configuration Departure
TCD Thyratron Core Driver
TCE Thermal Control Electronics
TCE Tsunamis en las Costas Europeas (language?)
TCI Tele-Communications International (duplicates?; company)
TCM TDRSS Communications Mode
TCM Technical Coordination Meeting
TCM Third-Class Mail
TCM Tri-City Meats Inc.
TCO Total Cost of Ownership
TCP Transmission Control Protocol (not duplicates; which is correct?) *
TCR Target Control Record
TCR Thermo-setting Cast Resin
TCS Temperate Coastal System
TCS Transmission Controlled Spark
TCU Transmission Control Unit
TCV Thurston Community Television
TDA Three-Dimensional Architecture
TDA Tracking Data-Acquisition
TDC Time-delay Closing (Sure, just TRY to delay time!)
TDD Time-Division Duplex
TDE Two-Dimensional Echocardiogram
TDF Typeface Definition File (computer file extension; not duplicates)
TDF Typeface Definition File @ (other; not duplicates)
TDI Transport Device Interface
TDM Technical Document Management
TDM Tool Design Manual
TDP Technical Data Package
TDP Telephone Distribution Panel
TDR Tool Design Request
TDS Tradeoff Design Studies
TDU Target Detection Unit
TDW Task Description Worksheet
TDX Tracking Dog eXcellent (dogs; AKC or CKC; 'X' for 'excellent')
TEB Tone Encoded Burst
TEC Topographic Engineering Center
TEF Test and Evaluation Facility
TEL Tetra-Ethyl Lead (chemical)
TEL Type-Enforcing Language
TEN Tax-Exempt Note (banking)
TER Tactical Electronic Reconnaissance (military)
TER Trailing-Edge Right
TES Test and Evaluation Squadron
TF0 Timer Flag Zero
TF1 Timer Flag One
TFD T-coded Form Die
TFH Technische Fach-Hoschule (German)
TFI The Friendly Instructions (as in RTFI; not duplicates)
TFL Transition Flight Level
TFP TOPS Filing Protocol (commercial)
TFS Three-Finger Salute
TFT Thin-Film Transistor
TFX Too Freaking eXpensive (not duplicates; 'X' for 'expensive')
TGD Thousand Gallons per Day
TGL Terminal Guidance Laboratory
TGO To Go Order
TH1 Timer One, High byte (register)
THC Tracking Handle Control
THF Two Henry Four (Shakespeare)
THR Transmitter Holding Register
THS Tenino High School (Washington)
THX Tom Holman Crossover (commercial; 'X' for 'crossover' - not verified)
TIA Texas International Airlines, Inc.
TIA Thanks In Advance
TIB Transcribed Information Briefing
TIC Token-ring Interface Card
TID Ter In Die (Latin; not duplicates; both are used)
TIF Tagged Image Format (computer file extension; not duplicates)
TIF Terminal Intrusion Function
TIG Texas Instruments Graphics (commercial)
TIG Tungsten/ Inert-Gas
TIM Telephone Interface Module
TIM Text Information Management
TIP Technical Information Package
TIR Target Illuminating RADAR
TIR Type Inspection Record
TIS Time Independent Sequence
TIU Turn It Up!
TIZ Traffic Information Zone
TKR Time-Keeping Record
TLA Throttle Lever Angle (aircraft)
TLB Translation Look-aside Buffer
TLC Thrust Limit Computation
TLD Test Loop Diagram
TLE Temperature Limited Emission
TLM Timber-Land Management
TLS Target Level of Service
TLS Telemetry Listing Submodule
TMA Thermo-Mechanical Analysis
TMA Too Many Acronyms! ($
TMC The Microstation Community (commercial)
TMD Theoretical Maximum Density
TMI Trailer Marketing Incorporated
TMJ Temporo-Mandibular Joint (medicine)
TMN Transverse-Mode Noise
TMP Technical Military Programming
TMR Tooling Material Request
TMS Terminal Monitoring System
TMS Tin Men Supply (company)
TMS Tooling Material Support
TMS Transaction Monitor System
TNA Task-bar Notification Application
TNC Texas News Channel (television)
TNM Telephony Network Management (telephony)
TNT Thin Nitrile Tecnology (commercial)
TOA Tropical Ocean Atmosphere
TOB Time Of Burst
TOC Total Operating Cost
TOE Typhoon Operational Experiment (WMO)
TOF Time Of Flight
TOH Total Operating Hours
TOO Table Of Organization
TOP Top Of Parapet (architectural)
TOR Transmit Or Receive
TOT Tropical Ozone-Transport
TP1 Transport Protocol class 1 (class details unknown; OSI)
TPC Tactical Pilotage Chart
TPC The Phone Company (movie: "The President's Analyst")
TPD The Prime Directive (fiction; Star Trek)
TPF Theoretical Point of Fog
TPH Tons Per Hour
TPH Transactions Per Hour
TPL Table-Producing Language
TPM Test Program Medium
TPM Total Productive Maintenance
TPO Transport Protocol class 0
TPO Transportation Packaging Order
TPR TAB Professional and Reference books (commercial)
TPS Test Package Set
TPS This Program Sucks
TPS Transaction Processing System
TPU Tacoma Public Utilities
TPU Tape Preparation Unit
TPY Tons Per Year
TRA Tax Relief Act
TRA Threaded-Rod in Adhesive anchor (architectural)
TRB Transmission Re-Builder (not duplicates)
TRF Time-Release Fertilizer
TRG Taper Ring Gauge
TRI Text Retrieval and Indexing
TRI Time-Resolution Imaging
TRM Todd, Rick, Matt (company)
TRP Test Requirement Package
TRS Takeoff Rotation Speed
TRS Tracking and Reconnaissance System
TRU Transportable Radio Unit
TSA Testicular Sperm Aspiration
TSA The Science of Acronyms ($)
TSB Termination Status Block
TSC Telecommunications Service Company
TSC Transportation System Center
TSE Target System Error
TSE Testicular Self-Examination
TSE Transmissible Spongiform Encephalopathy (disease)
TSF Threat Situation Format
TSI Time Since Installation
TSL Transducer Speaker Library (commercial)
TSO Technical Service Order
TSO Test Site Office
TSP Termination Settlement Proposal
TSP Thermoplastic Sandwich Panel
TSP Traffic-Safety Program
TSR Test Strategy Report
TSR Test Support Request
TSS Takeoff Safety Speed
TSS Time Sharing System
TSS Time Standards System
TSU Tennessee State University
TSU Thermal Structural Unit
TSW Tropical-Storm Warning
TTC Terminating Toll Center (telephony)
TTD Time To Destination
TTD Time To Diagnose
TTF TrueType Font @ (other; not duplicates)
TTL Time To Live
TTO Transmitter Turn-Off
TTP Tape To Print
TTP Trainer Test Procedure
TTP Tropospheric Transport of Pollutants
TTS Target Tracking Site
TTS Transaction Tracking System
TTT Tandem-Tie Trunk (telephony)
TTU Tennessee Technological University
TTU True Transonic Ultrasonic
TUC Tool Usage/ Coordination
TUP Trinity University Players
TUR Transport Urile Aeriene Romane *
TUT To You, Too ('U' for 'you')
TVE Technical and Vocational Education
TVI Target Verification Interrogation
TVM Tachometer Volt-Meter
TVP Transient-Voltage Protection
TVS Thermal Vacuum-Switch
TWA Trade-Winds Airways Ltd.
TWB Terrestrial Wide-Band (DARPA)
TWC Third World Country
TWD Two-Wheel Disk brakes
TWE Trans-World Express
TWM Traveling Wave Maser
TWS Tail Warning Subsystem (not duplicates)
TWS Tail Warning System
TWT Task Work Request
TWT Traveling-Wave Tube
TXF Tax Exchange Format @ (other; not duplicates)
UAA University Athletic Association
UAA University of Alaska, Anchorage
UAB Under And Below (joke)
UAC Uninterrupted Automatic Control
UAD Upper Advisory Route
UAF Uruguayan Air-Force (military)
UAJ Umm Al Jawaby Oil Services Company
UAL Unit Authorization List
UAN Unit Assembly Number
UAS United Air Services
UAT User Access Terminal
UAW Updated Add Wire
UAW Upper Air-Way
UBI Unified Business Identification
UCB University College of Belize
UCC Unit-Conversion Calculator
UCC Upgrade Compliance Check
UCC Upholstery and Carpet Cleaning
UCE Useable Cue Environment
UCP Unit de Coordination du Programme de (language?)
UCS Uniform Cost System
UCS Universal Character-Set
UCT Under Continuous Testing
UDA Under Dutch Administration
UDC Universal Disk Control
UDF Un-Ducted Fan
UDG User-Defined Gateway
UDL Uniform Data Link
UDR Urgent Data Request
UDX Utility Dog eXcellent (dogs; AKC; 'X' for 'excellent')
UEF Unified Extra-Fine (thread)
UEI United Electronic Industries (company)
UEP Unplanned Event Pickup
UET Unit-Level End Item Test
UFM Under-Frequency Monitor
UFS Universal File Service (not duplicates)
UFS Universal File System (not duplicates)
UFS UNIX File Service (not duplicates; commercial)
UFS UNIX File System (not duplicates; commercial)
UGB Urban-Growth Boundary
UGI Union Gographique Internationale (language?)
UHC Unburned Hydro-Carbon (chemical)
UHR Ultra-High Resolution
UHR Unlimited-Hydroplane Racing
UHV Ultra High Vacuum
UIC University of Illinois, Chicago
UIF User Inter-Face
UIS Ulead Information Sequence *
UIS User Interface Software
UIT Universal Information Transport
ULA Unauthorized Landing Area (aircraft)
ULD Underwater Locating Device
ULP Upper-Layer Protocol
ULS Ultra-Lightweight Structure
UMA Unified Memory Architecture
UMC United Methodist Church
UMI University Microfilms International (company)
UMP University Medical Products
UMS Update and Management System
UNA Upstream Neighbor Address
UNC United Network Command
UNO United Nations Organization
UNO Unless Noted Otherwise (architectural)
UNY Upstate New York
UOL Underwater Object Locator
UOR Undulating Oceanographic Recorder
UPA Urban Priority Area
UPD University Police Department
UPI United Press International (company)
UPL Unique Parts List
UPO Un-planned Power-Outage
UPS Uninterrupted Power-Source (not duplicates)
UPS Updates Per Second
UPS Upper Chip Select
UQA Un-Qualified Applicant
UQL Unacceptable Quality Level
URI Uniform Resource Identifier
URL Universal Resource Locator (preferred; computer file extension; not duplicates)
URO Ultra-Racist Organization
URS Users Recommended Solutions
USA United States Army (military)
USC United States Cent (monetary)
USC University of Special Connections
USD Unique Signal Device
USG United States Global Trading Co.
USL Unix System Laboratories
USL UNIX Systems Laboratories (commercial)
USO Universal Service Order
USO UNIX Software Operation (commercial)
USP University of the South Pacific, Fiji
USS United States Standard
USS United States Steel (informal; not duplicates)
USS United States Steel Corp. (formal; not duplicates)
UST Utilize Systems Technology
USW Und So Weiter (German)
UT1 Universal Time One
UTC Ultimate Texture Collection (commercial)
UTD Uniform geometrical Theory of Diffraction
UTI Universal Technical Institute (commercial)
UTI Urinary-Tract Infection
UTM Unsuccessful Transmission Message
UTS Use The Source! (commercial)
UTU United Transportation Union
UUC UNIX-to-UNIX Copy
UUG Utstredni Ustav Geologicky (language?)
UUT Unit Under Test
UVM Unreal Virtual Machine (commercial)
UVS Ultra-Violet Spectrometer
UWM University of William and Mary
UWS University of Whales, Swasea
V2R VASI, Two lights on Right (aircraft)
VAA Verb, Active and Intransitive
VAA Victorian Apiarists' Association
VAB Van Allen Belts
VAB Vertical Axis Bearing
VAC Valley-Athletic Club (commercial)
VAC Ventriculo-Arterial Conduction (not duplicates)
VAC Verification And Check-out
VAC Video-Amplifier Chain
VAC Virtual Active Control
VAC Volt-Ampere Characteristics
VAD Vascular Access-Device
VAD Velocity-Azimuth Display (aircraft)
VAD Virtual Aircraft Development (not duplicates)
VAD Voltmeter Analog-to-Digital converter
VAF Vane Air-Flow
VAG Vernacular Architecture Group
VAI Ventilation Air Intake
VAI Video-Assisted Instruction
VAK Vertical Assembly Kit
VAL Virtual Application Language
VAL Visual Approach and Landing chart (aircraft)
VAM Value-Added Marketing (not duplicates)
VAM Vending and Affixing Machine
VAN Value-Added Network
VAR Volt-Amperes Reactance
VAS Vertical Aircraft Sizing
VAV Validation And Verification (not duplicates)
VAV Value Application Venders
VBA Volley-Ball Association
VBO Velocity to Burn-Out
VBS Vertical Beam Sensor
VBX Visual BASIC Extension @ (commercial; computer file extension; not duplicates)
VCA Vendor Cost Audit
VCD Virtual Communications Driver
VCF Viscosity Correction Factor
VCG Vector Cardio-Gram
VCL Visual Check List
VCM Vertical location of the Center of Mass
VCO Variable Crystal Oscillator
VCS Vehicle Control System
VCS Version Control System
VCT Vinyl Composition Tile
VCU Virginia Commonwealth University
VDA Video Data Access
VDC Video Data Channel
VDE Video Display Editor
VDF Variable Density Filter
VDG Value-Dependence Graph
VDM Vienna Definition Model (not duplicates)
VDP Vertical Dilution of Precision
VDP Visual Descent Point
VDR Vendor Data Requirement
VDS Video Data System
VDU Video Distribution Unit
VDV Very Distinguished Visitor
VED Vehicle Engineering Department
VEG Very Evil Grin
VEM Virtual Expanded-Memory
VEV Voice-Excited Vocoder
VFA Vibration Fly Around
VFC Voice Frequency Carrier
VFG Very Frigging Good (not duplicates)
VFP Veterans For Peace
VFS Visual Flight Simulator (not duplicates)
VGA Video Gate Array (commercial; not duplicates)
VGA Video Graphics Array (commercial; not duplicates)
VGH Vertical Gust and Height
VGS Visual Glide Slope (aircraft)
VHC Vancouver Hockey Club
VHS Very High-Speed
VHS Virtual-Host Storage
VIC Vertical-Impacter [rock] Crusher
VIE Virtual-Interrupt Enable
VIM Vendor-Independent Messaging
VIP Variable Information Processing
VIP Very Important Person
VIS Visual Information Services
VIT Visual Information Technologies Inc.
VIU Video Interface-Unit
VLA Very Large Array (radio telescope)
VLA Very Low Altitude
VLD Visible Laser Diode
Vlo Velocity, Landing-gear, Operating (aircraft; [non]capitalization by creator)
VLR Very Low Range
VLU Video Logic Unit
VMA Virtual Memory Address
VMC Virtual Machine Communications
VME Versa Module Eurocard (commercial; duplicates?; same thing)
VME Virtual-Machine Extension
VMM Virtual Multi-Meter
VMM Virtual-Memory Management (not duplicates)
VMM Virtual-Memory Manager (not duplicates)
VMS Verification Methods Summary
VMS Voice Management System
VMT Versatile Message-Transaction
VNA Virtual Network Architecture
VNB Valley Nut and Bolt (company)
VOA Volunteers Of America
VOC Volatile Organic Compound
VOD Voice Over Data
VOO Vessel Of Opportunity
VOQ Visiting Officer's Quarters (military)
VOS Virtual Operating-System
VOW Volunteers for Outdoor Washington
VPC Virtual Product Console
VPE Vendor-Provided Equipment
VPE Virtual Processing Element
VPL Virtual Programming Language
VPM Volts Per Meter
VPP Velocity Prediction Program (commercial; boat design)
VPT Voice-Powered Technology
VRC Vertical-Redundancy Character
VRD Vancouver Regional District
VRF Vector Relational Format
VRM Visual Raw Material
VRM Voltage-Regulator Module
VRS Virtual-Reality Software
VRT Voltage Regulation Technology (commercial)
VRU Voice-Response Unit
VSC Variable-Speed Chain
VSC Vehicle Skid Control
VSC Voltage-Saturated Capacitor
VSE Vehicular Support Equipment
VSF Vertical Scanning Frequency
VSI Virtual Serial Input
VSM Virtual Storage Management
VSP Vector Scientific Processing
VSP Virtual Software Processor
VSR Very Short Range
VSS Vertical Support Ship
VSS Visual Source Safe (commercial)
VST Variable Surface Tracking (dogs; AKC)
VSV Vacuum Switching Valve
VSW Voltage Standing-Wave
VTC Video Tele-Conferencing
VTC Voting Trust Certificate
VTH Vendor-Tested Hardware
VTL VISA Transition Library
VTM Video-Tape Machine
VTP Vertical Temperature Profiler (not duplicates)
VTR Video-Tape Reproducer
VTS Vendor-Tested Software
VUB Vrije Universiteit Brussel (Belgian)
VUI Video User-Interface (duplicates?)
VVC Voltage-Variable Capacitor
VWB Visual Work-Bench (commercial)
VWG Very Wicked Grin
VWS Voice Warning System
VWW Variable Width Word (not duplicates)
WAA Wardens' Association of America
WAA West Australian Airways (company)
WAA Western Awning Association
WAA Worker Adjustment Assistance
WAA Writing Assistants' Association
WAB Westinghouse Air Brake Co.
WAC Wage Analysis and Control (not duplicates)
WAC Wake Analysis and Control (not duplicates)
WAC Washington Athletic Club
WAC West Africa Committee
WAC Western Archeological Center
WAC Work Accomplishment Code
WAC Worked All Countries (amateur radio)
WAC World Administrative Conference
WAC Write Address Counter
WAD Weapons Alert Designator (military)
WAD Work Authorization Document
WAE When Actually Employed
WAF Widowed Asian Female ('singles' advertising)
WAF Women in the Air-Force (military)
WAF Women's Air-Force (military)
WAG Widowed Asian God ('singles' advertising)
WAG Wieder-Aufbau-Gesellschaft fuer die Juedische Bevoelkerung der Bucovina (language?) *
WAG Worked All Goose (amateur radio?)
WAH Work At Home
WAI Water-Alcohol Injection
WAI Worked All Italy (amateur radio)
WAK Wearable Artificial Kidney
WAL Western-American Literature
WAL Wyeth Ayerst Laboratories
WAM Warhead Assessment Missiles (military)
WAP Wireless Application Protocol
WAP Work-Around Procedure
WAR World Aero Refueling
WAS Wing And Spar
WAT Weighted Average Toxicity
WBA Wire-Bundle Assembly
WBC Weight and Balance Computation (not duplicates)
WBC Weight and Balance Computer (not duplicates)
WBF Water-Based Fluid
WBJ Wing Body Join
WBL Web-Based Learning
WBR West-Bound Road
WBR Wire-Bundle Revision
WBS Work Breakdown Schedule (not duplicates)
WCA Western Central Atlantic
WCB Will Call Back
WCC Wireless Cycle Computer (unfortunate ambiguousity)
WCD Weapon-Concept Definition (military)
WCD World Climate Data
WCF Widowed Chinese Father ('singles' advertising)
WCF Widowed Christian Female ('singles' advertising)
WCI World Climate Impact
WCL Wire-Connection List
WCM Widowed Chinese Mom (or Mother; 'singles' advertising)
WCN Wireless Computer Network
WCP Window Cleaning Professional
WCR Wiring Change Request
WCS Wildlife Conservations Society
WCS Workstation Communication Services
WCT West-Coast Trucking (company)
WCU Waveform Converter Unit
WDA Weapons Delivery Avionics (military)
WDD Wire Diagram Data
WDL Weapons Data List (not duplicates; military)
WDM Wavelength-Division Multiplexing
WDR Warranty Disposition Reports
WDW Walt Disney World
WDX Working Dog eXcellent (dogs; ACC or AWSC; 'X' for 'excellent')
WEC World Environment Center
WED Western Europe Daylight
WES Warning Electronic System
WEU Weapons Enable Unit (military)
WFA Work-Force Adjustment
WFE Wave-Front Error
WFE WSC Furnished Equipment
WFM Widowed French Male ('singles' advertising)
WFP Waiting For Parts
WFP Wire Forecast Program
WFS Washington Federal Savings (company)
WfS Washington Floral Service (company; [non]capitalization by creator)
WGD Working Group on Data
WGS Work Group System
WGT Wheeled Ground Transportation
WHC World Hydrological Cycle
WHI Woods Hole Institution
WHT Watt-Hour demand meter, Thermal
WIC Wavelength Independent Coupler
WIC Woman In Charge
WIC Women in Communications
WIE Women In the Environment
WIG Widowed Italian God ('singles' advertising)
WIM Widowed Italian Mom (or Mother; 'singles' advertising)
WIN Work Item Number
WIR Work and Inspection Record
WIT Web Interactive Talk
WJA World Jet Aircraft Industries, Inc.
WJC Water-Jet Cutter (not duplicates)
WJD Weld Jig Duct
WJG Widowed Jewish Goddess ('singles' advertising)
WLB War Labor Board
WLI William Law Institute (commercial?)
wln Western Library Network @ ([non]capitalization by creator; not duplicates; both are used)
WMA Western Marketing Agents (commercial)
WMD Weapon of Mass Destruction (military)
WMO World Meteorological Organization
WMS Work Management System
WMY World Mathematical Year (IMU)
WNT Windows New Technology (commercial)
WOD Weather Of the Day
WOD Word Of the Day
WOF Widowed Oriental Father ('singles' advertising)
WOF Work Order Form
WOL Word Of Light (church)
WOM Write-Only Memory (joke)
WOR Work Order Release
WOS Windows Open Services Architecture (commercial)
WOT Wide-Open Throttle
WPA Warsaw Pact Alliance
WPB Write Printer Binary
WPC Water Pollution Control
WPC Weeks Per Century
WPD Weeks Per Decade
WPE Western Plastics Expositon (Advanstar Expositions)
WPI Wire Provisions Installation
WPK WordPerfect Keyboard @ (commercial; computer file extension; not duplicates)
WPR Work performance review
WPT Wireless Portable Telephone (telephony)
WPY Weeks Per Year
WQM Water-Quality Monitor
WQR Water-Quality Report
WRD Water Rescue Dog (dogs; NCA)
WRI Wildland Resources Information
WRO Western-Region Office
WRP Wing Reference Plane (aircraft)
WRR Water Resources Research
WRT With Regards To
WSC West-side Shopping Center (real-estate)
WSE Willis Shaw Express (company)
WSF Washington State Ferry System
WSF Western Systems And Fabrication (company)
WSJ Wall Street Journal (commercial; newspaper)
WSO Weather-Service Office
WSP Working Steam Pressure
WSQ Work Station Qualifier
WSR Weapons Systems Reliability (military)
WSS Weapons Suspension Subsystem (military)
WSW Weapons Systems Warranty (military)
WTC World Trade Center
WTF What The Fuck?
WTH What The Hell? (not duplicates)
WTO Western Theater of Operations
WTT Working Together Team
WTW Wall-To-Wall
WUG Windows Users-Group
WUV Weighted Unit Value
WWB White Warning-Beacon
WWF Widowed White Father ('singles' advertising)
WWF Widowed White Female ('singles' advertising)
WWG Widowed White God ('singles' advertising)
WWL White Warning-Lamp
WWR Western Weekly Reports
WWW World Weather Watch
WWW World Wide Web (not duplicates; both are used; incorrect; non-proper noun)
WYG Widowed Yellow Goddess ('singles' advertising)
WYM Widowed Yellow Mom (or Mother; 'singles' advertising)
XAS X-band Antenna System
XBM X-Windows Bit-Map @ (other; commercial; not duplicates)
XCF eXperimental Computing Facility ('X' for 'experimental')
XCO Crystal-Controlled Oscillator ('X' for 'crystal')
XCU eXplosion Collapse, Underground operations ('X' for 'explosion')
XDM Xerox Dry Microfilm (commercial)
XDP eXtended Data-Processing ('X' for 'extended')
XDP Xero-Derma Pigmentosum
XDS X-ray Diffraction System
XFA X-ray Fluorescence Absorption
XFN X/ open Federated Naming
Xfr Cross in front of Right Foot ('X' for 'cross')
XGA eXtended Graphics Array (commercial; 'X' for 'extended')
XHV eXtra-High Frequency ('X' for 'extra')
XIO Extended Input-Output
XJR eXperimental Jaguar Racing ('X' for 'experimental')
XLA X-band Limiter Attenuator
XLC eXtra-Large Capacity ('X' for 'extra')
XLH Cross-Linked Hupophosphatemia ('X' for 'cross')
XLS Xenon Light-Source
XMM eXpended-Memory Mangler ('X' for 'expended'; joke)
XMM eXtended-Memory Manager ('X' for 'extended')
XMM X-ray Multi-mirror Mission
XMS eXtended-Memory Specification ('X' for 'extended'; LIM/AST)
XNS Xerox Network Services (commercial)
XOS Cross-Office Slot ('X' for 'cross')
XOS Xerox Operating-System (commercial)
XPA X-band Passive Array
XPC eXternal Power Contactor ('X' for 'external')
XPP Xi Psi Phi (Greek)
XPS X-ray Photoemmission Spectroscopy (not duplicates)
XPT eXpress Paid Telegraph ('X' for 'express')
XRA X-Ray Assistant
XRF eXperimental Reproduction Film ('X' for 'experimental')
XRL X-Ray LASER
XRS X-Ray Spectrometry
XRT X-Ray Technician
XSA Cross-Sectional Area ('X' for 'cross')
XSL eXtensible Style Language ('X' for 'extensible'; W3C)
XST eXperimental Stealth Tactical demonstrator ('X' for 'experimental')
XTC eXcess Three Code ('X' for 'excess')
XTE Cross Track Error ('X' for 'cross')
XTI X/ Open Transport Interface
XTR X-ray Transition Radiation
XVC Xenotron Video Composer (commercial)
XXS eXtra-eXtra [or Double extra] Strong ('X' for 'extra')
XYA X-Y Axis
XYL eX Young Lady ('X' for 'ex')
YAA Yachtsmen's Association of America
YAD Young's Nova Scotia Admiralty Decisions
YAF Young Asian Female ('singles' advertising)
YAF Young Australian Female ('singles' advertising)
YAG Young Asian God ('singles' advertising)
YAL Yttrium-Aluminum Laser
YAP Yaw And Pitch
YBA Youth Basketball Association
YBF Young Black Father ('singles' advertising)
YBT Youssef Ben Tachfine (Morrocan; seismograph)
YCC Luma, Chroma, Chroma ('Y' for 'luma')
YCD Young Christian Dad ('singles' advertising)
YCF Young Calvinist Federation
YCI Young Communist International
YCM Young Christian Male ('singles' advertising)
YCS high-school Young Christian Students
YCS Yearbook of Construction Statistics
YCS Young Collector Series
YDA Youth Development Association
YDC Yeast-extract Dextrose Calcium-carbonate agar
YDQ Yale Divinity Quarterly (publication)
YEA Year of Energy Action
YEA Yeast Extract Agar
YEC Year End Closing
YEP Yaw Envelope Protection
YES Yogurt Extra Smooth
YES Youth Emergency Service
YES Youth for Environmental Sanity
YFD Young French Dad ('singles' advertising)
YFU Youth For Understanding
YGH Your Good Health (publication)
YGL Yttrium Garnet LASER
YHA Youth Hostels Association
YHS Yelm High School (Washington)
YIF Young Indian Female ('singles' advertising)
YIG Young Indian God ('singles' advertising)
YIG Young Italian God ('singles' advertising)
YIM Young Indian Mom (or Mother; 'singles' advertising)
YIT Youth In Transition
YJG Young Jewish Goddess ('singles' advertising)
YJM Young Jewish Male ('singles' advertising)
YKB Yemen Kuwait Bank for Trade and Investment (commercial)
YLI Young Ladies' Institute
YMA Yeast Morphology Agar
YMC Your Marketing Consultant (not duplicates)
YMM Yeast Minimal Medium
YMS Young Micro Systems (company)
YOB Youth Opportunities Board
YOC Youth Opportunity Centers
YOD Year Of Death
YOG Young Oriental Goddess ('singles' advertising)
YPA Yearbook Printers' Association
YPD Yellow Pages Datasystem
YPF Yacimientos Petroliferos Fiscales (Argentinean)
YPH Yards Per Hour
YPM Yokefellowship Prison Ministry
YPS Yellowstone Park Service
YRC Yaw Ratio Controller
YRS Ysgarth Rules System
YRS Yugoslav Relief Society
YSC Yearly Spares Cost
YSL Yves Saint Laurent (company)
YSO Youth Symphony Orchestra
YSS Yoke-Shaker Speed
YST Yukon Standard Time
YTB Yield To Broker
YTI Youth Training Initiative (Australian)
YTS Yuma Test Station
YUL Yale University Library
YUN Yearbook of the United Nations
YWA Year's Work in Archaeology
YWG Young White God ('singles' advertising)
YWL Yukon Law Library, Whitehorse, Yukon
YWS You Win Some
YWS Young Workers Scheme
YYM Young Yellow Mom (or Mother; 'singles' advertising)
ZAA Zartman Association of America
ZAA Zeeman-effect Atomic Absorption
ZAA Zero Angle of Attach (not duplicates)
ZAA Zero Angle of Attack
ZAB Zinc-Air Battery
ZAC Zinc Aluminum Coater
ZAC Zinc Ammonium Chloride (chemical)
ZAD Zenith-Angle Distribution
ZAF Zero Alignment Fixture
ZAI Zeirei Agudath Israel *
ZAI Zero Address Instruction
ZAI Zero Administrative Initiative
ZAI Zero Angle of Incidence
ZAL Zionist Archives and Library
ZAM Z-Axis Modulation
ZAM Zinc, Aluminum, Magnesium
ZAP Zeff Advanced Products (company; ZAPCo)
ZAP Zero Ability to Pay
ZAP Zero and Add Packed
ZAP Zero Antiaircraft Potential (military)
ZAP Zero-miss Antipersonnel Projectile (military)
ZAP Znamenity Amerikansky Pisatel (Russian)
ZAP Zone Axis Pattern
ZAP Zoological Action Program
ZAP Zymosan-Activated Plasma rabbit
ZAR Zero-G Antenna Range
ZAR Zeus Acquisition RADAR (military)
ZAS Zaire Aero Service
ZAS Zarkani Air Services (company)
ZAS Zero Access Storage
ZAS Zero-Administration Security (commercial)
ZAS Zymosan-Activated Serum
ZAT Zinc Atmospheric Tracer
ZAT Zydowska Agencja Telegraficzna (language?)
ZAW Zero Administration for Windows (commercial)
ZBA Zero-Based Analysis
ZBA Zero-Bias Anomaly
ZBA Zero-Bracket Amount
ZBA Zoning-Board Approval
ZBB Zero-Base Budgeting
ZBE Zinc Battery Electrode
ZBF Zero-Beat Frequency
ZBL Zero-Based Linearity
ZBO Zone of British Occupation
ZBP Zero-Base Programming
ZBR Zero Bend Radius
ZBR Zero-Base Review
ZBR Zero-Beat Reception
ZBR Zone Bit Recording
ZBS Zivena Beneficial Society
ZBT Zero-Beat Tuning
ZBT Zeta Beta Tau (Greek)
ZBT Zion Bemishpat Tipadeh (from the Bible)
ZBV Zoological Board of Victoria
ZCA Z Club of America
ZCA Zero-Current Apply
ZCB Zero-Coupon Bond
ZCB Zinc-Coated Bolt
ZCC Zeppelin Collectors' Club
ZCC Zero-Current Condition
ZCC Zero-Current Control
ZCC Zirconia-Coated Crucible
ZCD Zero Crossing Detector
ZCD Zone Controlled Deposition
ZCG Impedance Cardio-Gram ('Z' for 'impedance')
ZCL Zero Command-Line
ZCN Zinc-Coated Nut
ZCO Zero Cross-Over
ZCP Zero Command Point
ZCP Zero Control Point
ZCP Zinc-Chromate Primer
ZCP Zonta Club of Perth
ZCR Zero temperature Coefficient Resistor
ZCR Zero-Crossing Rate
ZCR Zero-Current Relay
ZCR Zero-Current Release
ZCR Zone of Correct Reading
ZCS Zero-Current Switch (not duplicates)
ZCS Zero-Current Switching (not duplicates)
ZCS Zinc-Coated Screw
ZCT Zero-Count Table
ZCW Zinc-Coated Washer
ZDA Zinc Development Association
ZDB Zeitschriften-Data-Bank (German)
ZDC Zero-Defects Council
ZDC Zeus Defense Center (military)
ZDC Zinc Dibenzyldithio-Carbamate (chemical)
ZDC Zinc Die-Casting
ZDC Zip Disk Controller (not duplicates)
ZDC Zip Drive Controller (not duplicates)
ZDD Zero-Delay Device
ZDD Zip Disk Drive (Iomega)
ZDE Zentralstelle Dokumentation Elektrotechnik (German)
ZDF Zucker Diabetic Fatty
ZDF Zweites Deutsches Fernsehen (German)
ZDG Zinc-Doped Germanium
ZDI Ziff Desktop Information
ZDI Ziff-Davis Interactive Co.
ZDK Zen-Do Kai Martial Arts Association, International
ZDL Zero Delay Lockout
ZDL Zivil-Dienst-Leistender (language?)
ZDL Zone Division Logic
ZDP Zero Delivery Pressure
ZDP Zero-Defects Policy
ZDP Zero-Defects Program
ZDP Zero-Defects Proposal
ZDP Zimbabwe Democratic Party
ZDP Zinc Diakyldithio-Phosphate (chemical)
ZDR Zentral-Deutsche Rundkunk (German)
ZDR Zeus Discrimination RADAR
ZDS Zenith Data Systems (company)
ZDS Zilog Development System
ZDS Zinc Detection System
ZDS Zung Depression Scale
Zdt Die Zoologie des Talmuds (language?)
ZDT Zero-Ductility Transition
ZDV Zero Dead-Volume
ZDV Zi-Do-Vudine (language?)
ZdZ Zeichen der Zeit (German)
ZEA Zero-Energy Assembly
ZEA Zero-Entropy Automorphism
ZEC Zero Energy Coefficient
ZEC Zinc Electrochemical Cell
ZEC Zurich Energy Corp.
ZED Zero Express Dialing
ZED Zero-Energy Deuterium
ZED Zur Erkenntnis der Dichtung (German)
ZEE Zona Econmica Exclusiva (language?)
ZEE Zone Economique Exclusive (language?)
ZEF Zero Extraction-Force
ZEG Zero Economic Growth
ZEG Zero Energy Growth
ZEI Zero Environmental Impact
ZEM Zero Electrophoretic Mobility
ZEN Zeit Ewig Nirgendwo (German)
ZEN Zeitgeist, Enhancement, Nonglare
ZES Zero-Energy System
ZES Zollinger-Ellison Syndrome
ZES Zona Marina Especialmente Sensible (language?)
ZES Zone-Electrophoresis System
ZES Zoo Education Service
ZET Zero-Emissions Truck
ZET Zero-gravity Expulsion Technique
ZEV Zero-Emissions Vehicle
ZFA Zero-Frequency Apply
ZFC Zero Failure Criteria
ZFC Zero-Field Cooled
ZFC Zero-Frequency Condition
ZFC Zero-Frequency Control
ZFC Zipp-Forming Cells
ZFC Zirconia Fuel Cell
ZfG Zeitschrift Feur Geschichtswissenschaft (German)
ZFL Zeitschrift Feur Lftrecht- und Weltraumrechtsfragen (German)
ZFP Zone du Front Polaire (language?)
ZFP Zyglo Fluorescent Penetrant (commercial)
ZFR Zero-Frequency Relay
ZFR Zero-Frequency Release
ZFS Zero Field Splitting
ZFS Zero-Frequency Switch (not duplicates)
ZFS Zero-Frequency Switching (not duplicates)
ZFS Zone Field Selection
ZfV Zeitschrift feur Versicherungswesen (German)
ZFW Zero Fuel-Weight
ZGA Zero Grade Air
ZGB Zoological Gardens Board
ZGE Zero-Gravity Effect
ZGE Zero-Gravity Environment
ZGE Zero-Gravity Expulsion
ZGF Zero Gravity Facility
ZGG Zero-Gravity Generator
ZGH Zonal Gravity Harmonic
ZGM Zinc Glycinate Marker
ZGS Zambia Geological Survey
ZGS Zero Gradient Synchrotron
ZGS Zero-Gravity Shower
ZGS Zero-Gravity Simulator
ZGS Zirconia Grain-Stabilized
ZGS Zone Gradient Synchrotron
ZGV Zapadnaya Gruppa Voisk (Soviet)
ZHE Zero Headspace Extractor
ZHF Zone Heat Flux
ZHR Zirconium Hydride Reactor
ZIA Zone of Interior Armies
ZIC Zirconia-Indium Crucible
ZID Zone of Initial Dilution
ZIE Zone Immuno-Electrophoresis
ZIF Zenix Income Fund (commercial)
ZIF Zero Insertion Force (not duplicates)
ZIG Zero Immune Globulin
ZIG Zoster Immune Globulin
ZIL Zigzag In-Line
ZIL Zork Interactive Language
ZiM Ziemia i Morze (language?)
ZIM Zonal Interdiction Missile (military)
ZIO Zinc Iodide-Osmium (chemical)
ZiP Za i Przeciw (language?)
ZIP Zero Insertion Pressure (not duplicates)
ZIP Zero Interest Payment
ZIP Zigzag Inline Package
ZIP Zinc Impurity Photodetector
ZIP Zodiacal Infrared Program
ZIP Zone Information Protocol
ZIP Zoster Immune Plasma
ZIR Zacks Investment Research (commercial)
ZIT Zone Information Table
ZKA Zentral-Katalog der Auslaendischen Literatur (language)
ZKW Zi-ka-wei (Chinese)
ZLC Zero-Lift Chord
ZLC Zinc, Lead, and Cadmium extracts
ZLD Zero Lift Drag
ZLD Zero-Level Drift
ZLD Zodiacal Light Device
ZLE Zaba Lee Enterprises (company)
ZLG Zero Line Gap
ZLI Zia Landform Images
ZLJ Zambia Law Journal
ZLL Zero Lot Line
ZLL Zero-Length Launch
ZLL Zero-Length Launching (military)
ZLN Zwiazek Ludowo-Narodowy (Polish)
ZLP Zero-Lift Plane
ZLR Zanzibar Law Reports
ZLR Zanzibar Protectorate Law Reports
ZLS Zero Level Sparing
ZLS Zero-gravity Locomotion Simulator
ZLV Z-axis along Local Vertical
ZLV Zero-Length Vector
ZMA Zinc Meta-Arsenite (chemical)
ZMB Z Marker Beacon (military)
ZMB Zero Moisture Bias
ZMB Zinc Mercato-Benzimidazole
ZMC Zero-Magnetostrictive Composition
ZMC Zygomatico-Maxillary Complex
ZMD Zung Measurement of Depression
ZMM Zone-Melting Model
ZMP Zero Moving Parts (not duplicates)
ZMP Zero-Motion Part (not duplicates)
ZMR Zone-Melting Recrystalization
ZMT ZIP Mail Translator
ZMU Zone Management Unit
ZNC Zone Network Controller
ZNC Zone of Nonproliferating Cells
ZNL Zero-memory Non-Linear
ZNP Zanzibar Nationalist Party
ZNP Zion Nuclear Plant
ZNR Zinc-oxide Nonlinear Resistor
ZOA Zionist Organization of America
ZOA Zone Of Action (military)
ZOA Zone of Avoidance
ZOC las Zonas Ocenicas Costeras (language?)
ZOC Zone Of Convenience (not duplicates)
ZOC Zone Of Convergence (not duplicates)
ZOD Zero-Order Detector
ZOE Zero-Order Equation
ZOE Zinc Oxide-Eugenol
ZOE Zone Of Entry
ZOE Zone Of Exclusion
ZOE Zone Of Exit
ZOF Zone Of Fire (military)
ZOG Zeatin-O-Glucoside
ZOG Zionist Occupation Government (U.S. Government)
ZOH Zero-Order Hold
ZOI Zero-Order Interpolator
ZOI Zone Of Incorporation
ZOP Zero-Order Predictor
ZOP Zinc-Oxide Pigment
ZOR Zinc-Oxide Resistor
ZOR Zone Of Reconnaissance
ZOS Zoom Optical System
ZPA Zero Period Acceleration
ZPA Zeus Program Analysis
ZPA Zone of Polarizing Activity
ZPB Z80 Processor Board
ZPB Zinc Primary-Battery
ZPB Zinc-Plated Bolt
ZPC Zero Print Control
ZPC Zero-Point of Charge
ZPC Zinc-Phosphate Coating
ZPC Zone Power Converter
ZPD Zero Path Difference
ZPE Zero-Point Energy
ZPE Zeta Phi Eta
ZPG Zero Population-Growth
ZPH Zero-Phonon Hole
ZPI Zone Position Indicator
ZPL Zero-Photon Line
ZPL Zim Passenger Line (commercial)
ZPM Zero-Point Motion
ZPN Zinc-Plated Nut
ZPO Zeus Project Office
ZPO Zone Project Officer
ZPP Zimbabwe Progressive Party
ZPR Zero-Power Reactor
ZPS ZEH Plotting Software
ZPS Zinc-Plated Screw
ZPS Zone Power-Supply
ZPT Zero Power Test
ZPT Zoxazolamine Paralysis Time
ZPV Zero-Point Vibration
ZPV Zone maritime Particulirement Vulnrable (language?)
ZPV Zoomed Port Video (commercial)
ZPW Zinc-Plated Washer
ZQT Zero Quantum Transition
ZRA Zero Range Approximation
ZRA Zero-Resistance Ammeter
ZRC Zenith Radio Corp.
ZRC Zurich Reinsurance Centre Holdings (commercial?; UK)
ZRE Zero Rate Error
ZRK Zona Receptor Kinase
ZRL Zagadnienia Rodzajow Literackich (language?)
ZRM Zone Reserved for Memory
ZRO Zoological Record On-line (not duplicates)
ZRO Zoological Record Outline (not duplicates)
ZRT Zero-Reaction Tool
ZRV Zero Relative-Velocity
ZSA Zero-Set Amplifier
ZSA Zero-Speed Apply
ZSB Zinc Storage-Battery
ZSC Zero-Speed Condition
ZSC Zero-Speed Control
ZSC Zero-Subcarrier Chromaticity
ZSC Zinc-Silicate Cell
ZSD Zebra-Stripe Display
ZSD Zinc-Sulfide Detector
ZSF Zero Skip Frequency
ZSG Zero-Speed Generator
ZSI Z Solar Inertial
ZSI Zero Size Image
ZSI Zytec Systems, Inc.
ZSL Zero Sight Line
ZSL Zero Straight Line
ZSL Zero-Slot LAN (commercial)
ZSL Zjednoczone Stronnictwo Ludowe (language?)
ZSL Zoological Society of London
ZSN Zoological Society of Naples
ZSN Zurich Sunspot Number
ZSR Zero-Speed Relay
ZSR Zero-Speed Release
ZSR Zeta Sedimentation Rate
ZSR Zinc Sedimentation Rate
ZSS Zen Studies Society
ZSS Zero-Speed Switch (not duplicates)
ZSS Zero-Speed Switching (not duplicates)
ZSS Zinc-Sulfide System
ZST Zinc-Sulfide Tracer
ZST Zone Standard Time
ZTA Zeta Tau Alpha (Greek)
ZTB Zuercher Taschen-Buch (language)
ZTC Zero Temperature-Coefficient (not duplicates)
ZTC Zone Temperature-Coefficient (not duplicates)
ZTC Zone Temperature-Controller (not duplicates)
ZTN Zinc Tannate of Naloxone
ZTO Zero-Time Outage
ZTO Zone Transportation Officer (military)
ZTP Zero-Temperature Plasma
ZTR Zweig Total Return Fund, Inc.
ZTS Zero-Transient Switch (not duplicates)
ZTS Zero-Transient Switching (not duplicates)
ZTS Zoom Transfer Scope
ZUM Zeitschrift fuer Urheber und Medienrecht (German)
ZUM Zimbabwe Unity Movement
ZUM Zone-Usage Measurement
ZuP Zellstoff und Papier (language?)
ZUP Zone a Urbaniser en Priorite (French)
ZVA Zero-order Variable Aperture
ZVA Zero-Voltage Apply
ZVC Zero-Voltage Condition
ZVC Zero-Voltage Control
ZVF Zero-Velocity Fading
ZVR Zener Voltage-Regulator
ZVR Zero-Voltage Relay
ZVR Zero-Voltage Release
ZVS Zero-Voltage Switch (not duplicates)
ZVS Zero-Voltage Switching (not duplicates)
ZVX Zygocactus Virus X
ZWL Zero Wave-Length
ZWO Zuiver Wentenschappelijk Orderzock (Dutch)
ZWP Zone Wind Plotter
ZWS Zell-Weger Syndrome
ZWS Zentral-Wohlfahrts-Stelle der Juden in Deutschland (German)
ZWS Zonal Wind-Stress
ZWV Zero Wave Velocity
ZYB Zionist Year-Book (publication?)
ZYP Zefkrome Yarn Program (commercial)
ZZA Zamak Zinc Alloy (commercial)
ZZC Zero-Zero Condition
ZZD Zig-Zag Diagram
ZZR Zig-Zag Rectifier
ZZR Zig-Zag Riveting
ZZT Zu Zu, Tennessee (seismograph)
ZZV Zero-Zero Visibility
ZZW Zero-Zero Weather

Of course many of these contain numbers and hence, are not technically TLAs.

Cthulhu