• acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars

• initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee

• pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).

(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome(i) = initialism, e.g.: CD – (i) compact disc(p) = pseudo-blend, e.g.: *UNIFEM – (p)United Nations Development Fund for Women

(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – *Megahertz*)

• a – (s) Atto-

• A – (s) Ampere

A0–9

• A1C – Airman First Class

• A2ATD or A2ATD – (i) Anti-Armour Advanced Technology Demonstration

• A2C2 or A2C2 – (i) Army Airspace Command and Control

• A4 – many, including a European standard office paper size; see entry

• A10 – (i) Atlantic 10 Conference

AA

• aa – (s) Afar language (ISO 639-1 code)

• aA – (s) Attoampere

• AA (i) achieved availability Alcoholics Anonymous (s) Armed Forces Americas (postal symbol) Aruba (FIPS 10-4 territory code) (i) assembly area Automobile Association avenue of approach

• AAA (i) administration, authorization, and authentication American Automobile Association ("Triple-A") anti-aircraft artillery Amateur Athletic Association (of England) Asistencia Asesoría y Administración (Spanish, "Assistance, Consulting, and Administration"— original name of Mexican professional wrestling promotion Lucha Libre AAA Worldwide)

• AAAI – (i) Association for the Advancement of Artificial Intelligence, formerly American Association for Artificial Intelligence

• AAAS – (i) American Association for the Advancement of Science

• AAAV – (i) Advanced Amphibious Assault Vehicle

• AABN - (i) African Aurora Business Network

• AABP - (i) American Association of Bovine Practitioners

• AAC (i) American Athletic Conference Army Air Corps (British Army)

• AACL (i) Albanian American Civic League

• AACCS (i) American Association of Christian Colleges and Seminaries

• AAD (i) analogue-analogue-digital (CD quality) Australian Antarctic Division

• AADD – Adult attention deficit disorder

• AADT – (i) annual average daily traffic

• AADAC – (a) Alberta Alcohol and Drug Abuse Commission

• AADC (i) area air defense commander (i) amino acid decarboxylase (i) aromatic L-amino acid decarboxylase (i) Australian Antarctic Data Centre

• AAFC (i) U.S. Army Air Corps Ferrying Command (1941–1942) All-America Football Conference (1946–1949)

• AAFES – (i) Army and Air Force Exchange Service

• AAI – (i) applied artificial intelligence

• AAIS – (i) advanced airborne interceptor simulator

• AAM – (i) air-to-air missile

• AAMOF – (i) as a matter of fact

• AAN – (i) American Academy of Nursing

• AANEAS – (a) Anglo-Australian Near-Earth Asteroid Survey

• AAODL – (i) Atmospheric Aerosols and Optics Data Library

• a.a.p. – (i) Associated Artists Productions (former film distributor)

• AAP (i) advanced acquisition plan Allied administrative publication American Academy of Pediatrics

• AAPC – (i) Accounting and Auditing Policy Committee

• aar – (s) Afar language (ISO 639-2 code)

• AAR (i) after-action review Association of American Railroads

• AARP – (i/s) American Association of Retired Persons (now officially known only by the initials)

• AAS (i) Advanced Automation System American Astronomical Society ("double-A-S")

• AASPEM – (i) advanced air-to-air system performance evaluation model

• AAT – (i) Australian Antarctic Territory

• AAV – (i) Amphibious Assault Vehicle

• AAWC – (i) anti-air warfare commander

AB

• ab – (s) Abkhaz language (ISO 639-1 code)

• AB (i) Able Seaman (both the rank and the occupation) (s) Alberta (postal symbol)

• ABA (i) Adriatic Basketball Association American Bar Association American Basketball Association American Beverage Association American Bicycle Association American Birding Association Australian Broadcasting Authority

• ABB – (i) ASEA Brown Boveri (Swiss-Swedish multinational company)

• ABBA – (a) Agnetha, Benny, Björn, Anni-Frid (Swedish pop group)

• ABC (i) abstinence, be faithful, condoms Active Body Control airway, breathing, circulation (see CPR) Alcoholic Beverage Commission alien big cat always be careful American Bird Conservancy American-born Chinese American Broadcasting Company anti-lock brake controller Associated British Corporation Atanasoff–Berry Computer Atlantic Baptist College atomic, biological, chemical (see NBC) Australian Broadcasting Corporation already been chewed gum

• ABCA (i) American, British and Canadian Armies (originally) Army Bureau of Current Affairs

• ABCS – (i) (U.S.) Army Battle Command System

• ABET – (a) Accreditation Board for Engineering and Technology

• ABFIST – (i) Advanced Bradley Full Crew Interactive Skills Trainer

• ABGI – (i) Addington-Barker Group International

• ABIN – (a) Agência Brasileira de Inteligência (Brazilian Intelligence Agency)

• abk – (s) Abkhaz language (ISO 639-2 code)

• ABL – (i) American Basketball League

• ABLE – (a) AirBorne Law Enforcement (police air support unit)

• ABM – (i) anti-ballistic missile – Asynchronous Balanced Mode – automated banking machine

• ABMC – (i) American Battle Monuments Commission

• ABN – (i) Australian Business Number (a number issued by the Australian government as registration of a business and used for taxation purposes)

• ABPI – (i) Association of the British Pharmaceutical Industry

• ABRSM – (a) Associated Board of the Royal Schools of Music

• ABS (i) acrylonitrile butadiene styrene anti-lock braking system

• ABSA – (a) Amalgamated Banks of South Africa ("ab-sa")

• ABSTRIPS – (p) abstraction-based STRIPS

• ABV – (i) Alcohol by volume

• ABW – (s) Aruba (ISO 3166 trigram)

AC

• aC – (s) Attocoulomb

• Ac – (s) Actinium

• AC (i) Adriamycin-Cyclophosphamide (chemotherapy) Air Conditioning Aircraftman Alternating Current Altocumulus ante Christum (Latin, "before Christ"; see BC) ante cibum (Latin, "before meals") (s) Antigua and Barbuda (FIPS 10-4 country code) (i) Associazione Calcio (Italian, "football (soccer) club")

• A/C – (i) Air Conditioned/Conditioning – Aircraft

• AC1 – Aircraftman 1st Class

• AC2 – Aircraftman 2nd Class

• ACA Affordable Care Act, shorthand for the Patient Protection and Affordable Care Act, commonly called "Obamacare" (i) Airspace Control Authority Airspace Co-ordination Area A Current Affair

• ACARS – (a) Aircraft Communications Addressing and Reporting System

• ACAS (a) Aboriginal Children's Advancement Society Advisory, Conciliation and Arbitration Service

• ACB – (i) Asociación de Clubes de Baloncesto (Spanish for "Association of Basketball Clubs")

• ACC (i) U.S. Air Combat Command Air Component Commander Alpine Club of Canada Altocumulus castellanus Area Control Center Atlantic Coast Conference Automatic climate control

• ACCA (i) The Association of Chartered Certified Accountants Automatic Cloud Cover Assessment

• ACCAC – (a) Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru (Qualifications, Curriculum and Assessment Authority for Wales)

• ACCD – American Coalition of Citizens with Disabilities

• ACCS – (i) Air Communications and Control Squadron

• ACDA – (i) Arms Control & Disarmament Agency

• ACDC (i) Alternating Current Direct Current the name of an Australian rock music band a term for a bisexual person

• A/Cdre – Air Commodore

• ACDT (a) Apple Certified Desktop Technician (a) Australian Central Daylight Time

• ACE (a) Air Combat Emulator (computer game) Allied Command Europe Angiotensin-converting enzyme Armored Combat Earthmover Automatic Computing Engine

• ACES (a) Aerolíneas Centrales de Colombia (Spanish, "Central Colombian Airlines") Auxiliary Campus Enterprises and Services of Alfred State College

• ACF (i) Administration for Children and Families American Car and Foundry American Culinary Federation

• ACHT – (i) Average Call Hold Time

• ACID – (a) Atomicity, Consistency, Isolation, and Durability (in databases)

• ACINT – (p) Acoustic Intelligence

• ACK – (p) Acknowledge (telecommunications; cf. NAK)

• ACL (i) Access Control List Anterior cruciate ligament; the initialism can also refer to an injury to this ligament Atlantic Coast Line Railroad

• ACLJ – (i) American Center for Law and Justice

• ACLOS – (i) Automatic CLOS (missile control system)

• ACLS – (i) American Council of Learned Societies

• ACLU (i) American Civil Liberties Union American Communist Lawyers Union (pejorative slang for the above)

• ACM – many, including Association for Computing Machinery; see entry

• ACMC – (i) (U.S.) Assistant Commandant of the Marine Corps

• ACN (i) Airborne Communications Node Australian Company Number (number issued by the Australian government as registration of a limited liability company)

• ACNA – (i) Anglican Church in North America

• ACO – (i) Airspace Control Order

• ACOBA – (a) Advisory Committee on Business Appointments

• ACOG – (a) American College of Obstetricians and Gynecologists

• ACOM – (p) (U.S.) Atlantic Command

• ACORN – (a) Association of Community Organizations for Reform Now

• ACP (i) African, Caribbean and Pacific Group of States Air Control Point

• ACR – (i) Advanced Concepts and Requirements

• ACRI – (p) African Crisis Initiative

• ACRT – (i) Advanced Concepts Research Tool simulator

• ACS (i) Affiliated Computer Services (NYSE ACS) Alaska Communications Service American Cancer Society American Chemical Society Association of Caribbean States Australian Computer Society

• ACSC – (i) Army Command and Staff College (various nations)

• ACST – (i) Australian Central Standard Time

• ACST – (i) American Cooperative School of Tunis

• ACT (i) Adaptive Control of Thought (cognitive model) American College Test (ing Program) Australian Capital Territory (also postal symbol)

• ACT UP – (a) AIDS Coalition to Unleash Power

• ACTD – (i) Advanced Concept Technology Demonstration

• ACTF (i) (U.S.) Army Constructive Training Federation Australian Children's Television Foundation

• ACT-R – (i) ACT-Rational (cognitive model)

• ACT-R/PM – (i) ACT-R/Perceptual-Motor (cognitive model)

• ACTU – (i) Australian Council of Trade Unions

• ACU – (a) American Conservative Union

• ACUF (i) BGN Advisory Committee on Undersea Features (a) American Conservative Union Foundation

• ACV – (i) Armoured Combat Vehicle

AD

• AD – (i) Air Defence – (s) Andorra (ISO 3166 digram) – (i) Anno Domini (Latin, "In the year of our Lord")

• A/D – (i) Analog/Digital

• ADA – (i) Air Defence Artillery – American Dental Association – Assistant District Attorney – Americans with Disabilities Act (see also the similar but non-acronymic Ada programming language)

• ADAC – (a/i) Allgemeiner Deutscher Automobil-Club (German, "General German Automobile Club")

• ADAGE – (a) Air Defense Air to Ground Engagement (simulation)

• ADAP – (i) AIDS Drug Assistance Program

• ADAS – (a/i) Asiago-DLR Asteroid Survey

• ADAT – (i) Alesis Digital Audio Tape (recording format)

• ADatP – (p) Automated Data Processing

• ADATS – (i) Agricultural Development and Training Society – Air Defence Anti-Tank System – Australian Defence Air Traffic System

• ADB – (i) Asian Development Bank

• ADC – (i) Aide De Camp – U.S. Air Defense Command (1946–1992) – Apple Display Connector – Program Against Digital Counterfeiting of Currency

• ADCTS – (i) Advanced Distributed Combat Training System

• ADD – (i) Analog Digital Digital (CD quality) – Attention-Deficit Disorder – Administration on Developmental Disabilities

• ADDIE – (i) Analyze Design Develop Implement and Evaluate

• ADDNS – (i) Advanced Deployable Day/Night Simulation

• ADF – (i) Australian Defence Force – African Development Foundation

• ADGB – Air Defence of Great Britain

• ADHD – (i) Attention-Deficit Hyperactivity Disorder

• ADHS – (i) Attention-Deficit Hyperactivity Syndrome

• ADI – (i) Acceptable/Allowable Daily Intake

• ADIZ – (a/i) Air Defence Identification Zone

• ADL – (i) Anti-Defamation League

• ad loc. – (p) ad locum (Latin, "to/at the place")

• ADM – (i) Administrative – (s) – Admiral, and the U.S. Public Health Service Commissioned Corps – Archer Daniels Midland – Assistant Deputy Minister

• ADOA – (a/i) Air Defence Operations Area

• ADP – (i) Adenosine DiPhosphate – Army Doctrine Publication (UK, Canada, Australia) – Automatic/Automated Data Processing

• ADRG – (p) Arc-second Raster Chart (ARC) Digitized Raster Graphics

• ADS – (a/i) Active Denial System – Astrophysics Data System – Attention Deficit Syndrome

• ADSR – (i) Attack, Decay, Sustain, Release (sound envelope specification)

• ADT – (i) Atlantic Daylight Time (UTC−3 hours)

• ADTB – (i) Army Doctrine and Training Bulletin

• adv. – (p) adversus (Latin, "against")

• ADW – (i) Air Defence Warning

AE

• ae – (s) Avestan language (ISO 639-1 code)

• AE (s) Armed Forces Africa/Canada/Europe/Middle East (postal symbol) United Arab Emirates (ISO 3166 digram; FIPS 10-4 country code) (i) Artix Entertainment American Eagle

• A&E – (a/i) Arts & Entertainment Network, the original name for the U.S. TV channel now known as A&E Network

• AED – (s) United Arab Emirates dirham (ISO 4217 currency code)

• AEDT – (a) Australian Eastern Daylight Time

• AEF – (i) American Expeditionary Force

• AEGIS – (p) Airborne Early warning Ground environment Interface Segment (fake etymology)

• AEI-T – (i) Army Enterprise Infostructure-Transport

• aeq. – (p) aequalis (Latin, "equal")

• AESR – (i) Aeronautical Equipment Service Record

• AEST – (a) Australian Eastern Standard Time

• aet. – (p) aetatis (Latin, "of age", "aged")

• aet – (i) After extra time (Football)

• AEW (i) Air Expeditionary Wing (i) Airborne early warning (i) Airborne electronic warfare (i) All Elite Wrestling (US professional wrestling promotion)

AF

• af – (s) Afrikaans language (ISO 639-1 code)

• aF – (s) Attofarad

• AF (s) Afghanistan (FIPS 10-4 country code; ISO 3166 digram) (i) Air Force As fuck

• AFA (i) U.S. Air Force Academy Asociación del Fútbol Argentino (Spanish, "Argentine Football Association")

• AFAIC – (i) As Far As I'm Concerned

• AFAICT – (i) As Far As I Can Tell

• AFAIK – (i) As Far As I Know

• AFAIR – (i) As Far As I Remember/Recall

• AFAM (i/a) Associazione Friulana di Astronomia e Meteorologia (Italian, "Friuli Association of Astronomy and Meteorology") (p) Department of African and Afro-American Studies, University of North Carolina at Chapel Hill — notable for its links to the school's academic-athletic scandal in the 2010s

• AFATDS – (i) Advanced Field Artillery Tactical Data System

• AFC (i) American Football Conference Approved for construction Asian Football Confederation

• AFCEA – (i) Armed Forces Communications and Electronics Association

• AfD (i) Allianz für Deutschland ("Alliance for Germany"), former political alliance in East Germany Alternative für Deutschland ("Alternative for Germany"), current German political party

• AFD (i) Active Format Description, a technical standard for TV or set-top box decoders Advanced Format Drive, a type of computing storage device Adjustable-frequency drive Adult Film Database, web-based database of adult cinema Agence française de développement ("French Development Agency"), a French international development agency Alliance des forces démocratiques (French; "Alliance of Democratic Forces"), an Ivorian political alliance Alliance for Freedom and Democracy, an Eritrean political party

• AFDB – (i) African Development Bank

• AFES – (i) Automatic Fire Extinguishing System

• AFG – (s) Afghanistan (ISO 3166 trigram)

• AFGAM - (i) Amazon Facebook Google Apple Microsoft

• AFI (s) French Territory of the Afars and Issas (ISO 3166 trigram; obsolete since 1977) (i) "Agencia Federal de Investigaciónes" (México)

• AFIS (a) Automated Fingerprint Identification System American Forces Information Service

• AFIST – (i) Abrams Full Crew Interactive Skills Trainer

• AFJ – (i) April Fool's Joke

• AFK – (i) Away From Keyboard (Internet chat abbreviation)

• AFL (i) American Federation of Labor American Football League — either the 1960s league that merged into the National Football League, or one of several other leagues of American football Arena Football League Australian Football League

• AFL-CIO – (i) American Federation of Labor – Congress of Industrial Organizations ^[3]

• AFLAC – (a) American Family Life Assurance Company of Columbus

• AFM – (i) Army Field Manual (UK; the U.S. more frequently uses just FM) – Atomic Force Microscope – Aviation Fleet Maintenance

• AFN – (s) Afghani (ISO 4217 currency code)

• AFO – (i) Association of Field Ornithologists

• AFOSR – (i) U.S. Air Force Office of Scientific Research

• AFP (i) Agence France-Presse (French, "French Press Agency") Australian Federal Police

• AFQT – (i) Armed Forces Qualification Test

• afr – (s) Afrikaans language (ISO 639-2 code)

• AFRC – (i) Air Force Reserve Command

• AFRL – (i) Air Force Research Laboratory

• AFROTC– (i) Air Force Reserve Officer Training Corps

• AFRRI – (i, U.S.) Armed Forces Radiobiology Research Institute

• AFRTS – (i) Armed Forces Radio and Television Service

• AFS (i) Active Front Steering Air Facility Sub-System Amniotic Fluid-derived Stem cell

• AFS&A or AFSA – (i) U.S. Air Force Studies and Analysis

• AFSC (i) U.S. Air Force Staff College (obsolete; replaced by JFSC) U.S. Air Force Systems Command

• AFSCN – (i) U.S. Air Force Satellite Control Network

• AFSPC – (i) Air Force Space Command

• AFT – American Farmland Trust

• AFV – (i) armoured fighting vehicle

• AFWA (a) Air Force Weather Agency Association of Fish and Wildlife Agencies

AG

• ag – (s) Attogram

• Ag – (s) Silver (Latin argentum)

• AG (i) air gunner Aktiengesellschaft (German, "incorporated") (s) Algeria (FIPS 10-4 country code) Antigua and Barbuda (ISO 3166 digram) Assemblies of God

• AGA (a/i) AB Gas-accumulator ("ah-gah", Swedish company) Advanced Graphics Architecture

• AGARD – (a) Advisory Group for Aerospace Research and Development

• AGARDograph – (p) Advanced Guidance for Alliance Research and Development publication

• AGASA – (a) Akeno Giant Air Shower Array (cosmic ray detector)

• AGB – (i) Internal Nintendo initialism (Advanced Game Boy) for Game Boy Advance

• AGC (i) Apollo Guidance Computer Automatic Gain Control

• AGC – (i) Adjutant General's Corps (British Army)

• AGDC – (i) Australian Game Developers' Conference

• AGI – (i) Auxiliary Group Intelligence

• AGL – (i) Above Ground Level

• AGM – (i) Annual General Meeting

• AGN – (i) Active Galactic Nucleus

• AGO – (s) Angola (ISO 3166 trigram)

• AGP – (i) Accelerated Graphics Port

• AGRICOLA - (a) Agriculture Online Access

• AGS – (i) Alaska Ground Station (LandSat)

• AGTS – (i) Advanced Gunnery Training System

• AGU – (i) American Geophysical Union

• AGW – (i) Autonomous Guided Weapon

AH

• aH – (s) Attohenry

• Ah – (s) Ampere-hour

• AH – (i) Attack Helicopter

• AHA – (i) American Heart Association

• AHCPR – (i) Agency for Health Care Policy and Research (obsolete; replaced with AHRQ)

• AHEC – (i) Australian Health Ethics Committee

• AHPCRC – (i) Army High Performance Computing Research Center

• AHQ – Air Headquarters

• AHRQ – (i) Agency for Healthcare Research and Quality

• AHS – (i) American Housing Survey

AI

• AI (i) Air Interdiction Amnesty International Artificial Insemination Artificial Intelligence (s) Anguilla (ISO 3166 digram)

• AIA (i) Aerospace Industries Association American Institute of Architects (s) Anguilla (ISO 3166 trigram)

• AIAA – (i) American Institute of Aeronautics and Astronautics

• AIC (i) African Independent Church Animal Identification Coordinator

• AICD – (i) Australian Institute of Company Directors

• AICMFP – (i) And I Claim My Five Pounds

• AID – (i) U.S. Agency for International Development

• AIDS – (a) Acquired Immune Deficiency Syndrome

• AIM – many, including AOL Instant Messenger, Australian Institute of Management; see entry

• AIMP – (i) Aurora Incremental Modernization Project

• AIPAC – (i) American Israel Public Affairs Committee

• AIR – (i) Aircraft Inventory Record

• AIRFA – (a) American Indian Religious Freedom Act

• AIRS – (a/i) Aerometric Information Retrieval System (obsolete; replaced with AFS)

• AIS (i) Australian Institute of Sport Automatic Identification System

• AISB – (i) (British Society for the Study of) Artificial Intelligence and the Simulation of Behaviour

AJ

• aJ – (s) Attojoule

• AJ – (s) Azerbaijan (FIPS 10-4 country code)

• Ajax – (a) Asynchronous JavaScript And XML

• AJD – (i) Astronomical Julian day

• AJP – (i) Allied Joint Publication

• AJPW – (i) All Japan Pro Wrestling

AK

• ak – (s) Akan languages (ISO 639-1 code)

• aK – (s) Attokelvin

• AK – (s) Alaska (postal symbol)

• aka – (s) Akan languages (ISO 639-2 code)

• a.k.a. – (i) Also known as (i.e.: alias)

• AKA – (i) Above knee amputation (orthopaedic usage)

• AKDT – (p) Alaska Standard Daylight Saving Time (UTC−8 hours)

• AKST – (p) Alaska Standard Time (UTC−9 hours)

• AKP – (i) Adalet ve Kalkınma Partisi (Turkish, "Justice and Development Party")

AL

• aL – (s) Attolitre

• Al – (s) Aluminium

• AL (s) Alabama (postal symbol) Albania (FIPS 10-4 country code; ISO 3166 digram) (i) Anno Lucis (Latin, "Year of Light", in Masonic tradition, most often seen on plaques bearing the founding dates of buildings, in years AD and years AL)

• ALA – (s) Åland Islands (ISO 3166 trigram)

• ALAP – (a) As Long/Late As Possible

• ALARM – (a) Air-Launched Anti-Radar Missile

• ALB – (s) Albania (ISO 3166 trigram)

• ALCOA or Alcoa - The Aluminum Company of America, NYSE:AA

• ALD – (i) Accounting Line Designator (nuclear weapon targeting)

• ALERT – (a) Advanced Linked Extended Reconnaissance and Targeting – Attack and Launch Early Reporting to Theatre

• ALF (a) Africa Leadership Forum Alien Life Form (cf. ALF (TV series)) Animal Liberation Front

• ALG – (s) Algeria (IOC and FIFA trigram, but not ISO 3166)

• ALGOL – (p) ALGOrithmic Language

• ALL – (s) Albanian lek (ISO 4217 currency code)

• ALOA – (i) Associated Locksmiths of America, Inc.

• ALOC (a) Air Lines Of Communication (a) Average Length of Calls

• ALPA – (a) Air Line Pilots Association

• ALS – (i) Amyotrophic Lateral Sclerosis – Automatic Landing System

• ALSHS – (a) Abraham Low Self-Help Systems

• ALSP – (i) Aggregate Level Simulation Protocol

• ALTE – (a) Association of Language Testers in Europe

• ALTACS – (p) Automated decision Logic Tactical Air Combat Simulation

AM

• am (s) Amharic language (ISO 639-1 code) Attometre

• Am – (s) Americium

• AM many, including Amplitude Modulation and Ante Meridiem; see entry (s) Armenia (FIPS 10-4 country code; ISO 3166 digram)

• AM1 – Airman 1st class

• AMA (i) American Medical Association Australian Medical Association

• AMAPS – (a) Aircraft, Missile, Avionics Performance Simulation

• AMC (i) Adaptive modulation and coding (digital communications) U.S. Air Mobility Command American Motors Corporation American Movie Classics (TV network; now known simply by the initials) U.S. Army Materiel Command

• AMCB – (i) U.S. Army/Marine Corps Board

• AMD (i) Advanced Micro Devices Age-related Macular Degeneration (s) Armenian dram (ISO 4217 currency code)

• AMF – (i) Afghan Military Force(s)

• AMFOM – (i) Advanced Missile Fly Out Model ("am-fomm")

• AMFR (i) Age-specific Marital Fertility Rate Amplitude Modulation Following Response

• AMFRS (i) Advanced Multi-Function Radio Frequency System Automatic Multisensor Feature-based Recognition System

• amh – (s) Amharic language (ISO 639-2 code)

• AML – (i) Acute Myeloid Leukaemia

• AMLCD – (i) Active Matrix Liquid Crystal Display

• AMLO (i) Andrés Manuel López Obrador (Mexican politician) Anti-Money Laundering Office — separate government agencies in Taiwan and Thailand

• AMO – (i) Atlantic Multidecadal Oscillation

• AMOLED – (i) Active-matrix organic light-emitting diode

• AMOS (a) Advanced MOrtar System Air Force Maui Optical and Supercomputing observatory

• AMP (i) Adenosine MonoPhosphate Automated Mission Planner

• AMRAAM – (a) Advanced Medium-Range Air-to-Air Missile

• AMRDEC – (i) U.S. Aviation & Missile Research, Development, & Engineering Center

• AMS (i) Agriculture Marketing Service American Mathematical Society

• AMSAA – (i/a) U.S. Army Materiel Systems Analysis Activity

• AMSO – (i/a) U.S. Army Model and Simulation Office

• AMSU - Advanced Microwave Sounding Unit

• AMTE – (i) UK Admiralty Marine Technology Establishment (1977–1984)

AN

• an – (s) Aragonese language (ISO 639-1 code)

• aN – (s) Attonewton

• AN (s) Andorra (FIPS 10-4 country code) Netherlands Antilles (ISO 3166 digram)

• ANA (i) Administration for Native Americans Afghan National Army All Nippon Airways Anti-Nuclear Anti-body (a) Australian National Airways Australian Natives' Association

• ANC – (i) African National Congress

• AND – (s) Andorra (ISO 3166 trigram)

• ANFO – (i) Ammonium nitrate/fuel oil (explosive)

• ANG (i) Air National Guard (s) Angola (IOC and FIFA trigram, but not ISO 3166) (s) Netherlands Antillian guilder (ISO 4217 currency code)

• ANGLiCo – (p) Air/Naval Gunfire Liaison Company

• ANL – (i) Argonne National Laboratory

• ANM – (i) Acoustic Noise Monitor

• ANOVA – (p) ANalysis Of VAriance

• ANS – (i) Applied and Natural Sciences

• ANSI – (a) American National Standards Institute

• ANTM – (i) America's Next Top Model

• ANT (s) Netherlands Antilles (ISO 3166 trigram) Antigua and Barbuda (IOC trigram, but not ISO 3166 or FIFA)

• ANTY - Acronyms, No Thank You

• ANWR – (i) Arctic National Wildlife Refuge /ˈænwɑːr/

• ANZ – (s) Australia and New Zealand Banking Group

• ANZAC – (a) Australian and New Zealand Army Corps

AO

• AO – (s) Angola (FIPS 10-4 country code; ISO 3166 digram) – (i) Approach Officer (submarine) – Area of Operations

• AOA – (i) Air Officer in charge of Administration – Argonne National Laboratory – (s) Angolan kwanza (ISO 4217 currency code) – (i) Award Of Arms (heraldry)

• AOC – (i) Air Operations Centre – Air Officer Commanding

• AOC in C – Air Officer Commanding in Chief

• AOD – (i) Adrenalin O.D. (punk rock band)

• AOI – (i) Angle Of Incidence (i) Arab Organization for Industrialization

• AOL – (i) America OnLine

• AOR – (i) Area of Responsibility

• AOSTH – (i) Adventures of Sonic the Hedgehog

• AOTS – (i) Attack of the Show!

• AOU – (i) American Ornithologists' Union

AP

• AP (i) Advanced Placement Air Publication (s) Andhra Pradesh (Indian state code) (s) Armed Forces Pacific (postal symbol) (i) Associated Press Auto Pilot

• APA – (i) Acolytes Protection Agency (professional wrestling tag team) American Psychiatric Association American Psychological Association (see also APA style, a writing format developed by this body)

• APB – (i) All Points Bulletin (police jargon)

• APC (i) Armoured Personnel Carrier Armour Piercing Capped (ammunition)

• APEC – (a) Asia Pacific Economic Cooperation

• APCNR – (i) Armour-Piercing, Composite Non-Rigid (ammunition)

• APCR – (i) Armour-Piercing, Composite Rigid (ammunition)

• APDS – (i) Armour-Piercing, Discarding-Sabot (ammunition)

• APEDS – (a) AMSAA Performance Estimates Data System

• APEX – (p) Applied Physics Express

• APFSDS – (i) Armour-Piercing, Fin-Stabilised, Discarding Sabot (ammunition)

• APHA – (i) American Public Health Association

• APHE – (i) Armour-Piercing, High Explosive (ammunition)

• APHIS – (a) Animal and Plant Health Inspection Service

• API – (i) Application Programming Interface

• APL (i) A Programming Language Acute Promyeloid Leukaemia Anti-Personnel Landmine Applied Physics Laboratory (Johns Hopkins University)

• APM – (i) Advanced Power Management

• APNP - Advanced Practice Nurse Prescriber

• APOD – (i) Aerial Port (Airport) Of Debarkation

• APOE – (i) Aerial Port (Airport) Of Embarkation

• APOLLO – (a) Apache Point Observatory Lunar Laser-ranging Operation

• APP – (i) Allied Procedural Publication

• APR – (i) Annual Percentage Rate

• APS (i) Advanced Photo System (cf. APS-C, an image sensor format based on the size of the original APS film frame) American Physical Society Antiphospholipid Antibody Syndrome

AQ

• AQ (i) AdventureQuest (s) American Samoa (FIPS 10-4 territory code) Antarctica (ISO 3166 digram) (i) Automatic qualifier, a term used by U.S. sports media from 1998 to 2013 to refer to the six conferences whose champions automatically entered the now-defunct Bowl Championship Series of college football

• AQIM – (i) Al-Qaeda in the Islamic Maghreb

AR

• ar – (s) Arabic language (ISO 639-1 code)

• Ar – (s) Argon

• AR – (s) Argentina (FIPS 10-4 country code; ISO 3166 digram) – Arkansas (postal symbol) – Armour – (s) Arunachal Pradesh (Indian state code)

• ara – (s) Arabic language (ISO 639-2 code)

• ARAG – (a) Advanced Research and Assessment Group

• ARB – (i) Administrative Review Board

• ARBA – (a/i) Army Review Boards Agency

• ARC – (i) Arc-second Raster Chart – Appalachian Regional Commission

• ARCA – (a) Automobile Racing Club of America

• ARCENT – (p) United States Army Central Command

• ARDA – (a) Advanced Research and Development Activity (became DTO 2006)

• ARE – (i) UK Admiralty Research Establishment (–1991) – (s) United Arab Emirates (ISO 3166 trigram)

• ARF – (i) ASEAN Regional Forum

• arg – (s) Aragonese language (ISO 639-2 code)

• ARG – (s) Argentina (ISO 3166 trigram)

• ARH – (s) Armed Reconnaissance Helicopter

• ARI – (i) Acute Respiratory Infection – U.S. Army Research Institute for the Behavioral and Social Sciences

• ARL – (i) UK Admiralty Research Laboratory (1921–1977) – U.S. Army Research Laboratory – UIUC Aviation Research Laboratory

• ARM – (a) Anti-Radiation Missile – Adjustable-rate mortgage – (s) Armenia (ISO 3166 trigram)

• ARNet – (p) Acquisition Reform Network

• AROTS - Australian Rare Or Threatened Species

• ARP – (i) Address Resolution Protocol – Applied Research Programme

• ARPA – (a) Advanced Research Projects Agency

• ARRC – (i) ACE Rapid Reaction Corps

• ARRF – (i) Allied Rapid Reaction Force

• ARRL - (i) American Radio Relay League

• ARS – (i) Agricultural Research Service – (s) Argentine peso (ISO 4217 currency code)

• ARSC – (i) Arctic Region Supercomputing Center

• ARSPACE – (p) U.S. Army Space Command

• ART – (a) Adaptive Resonance Theory – Anti-Retroviral Therapy

• ARTCC – (i) Air Route Traffic Control Center

• ARWG – (i) Army Research Working Group ("are-wig")

AS

• as (i) Adult swim (s) Assamese language (ISO 639-1 code) Attosecond

• aS – (s) Attosiemens

• As – (s) Arsenic

• AS (s) American Samoa (postal symbol; ISO 3166 digram) Australia (FIPS 10-4 country code) Assam / Asom (Indian state code)

• AS – (i) ActionScript

• A/S – (i) Anti-submarine

• A&S – (i) Armament & Standardisation

• ASA (i) AcetylSalicylic Acid American Standards Association Army Security Agency Atlantic Southeast Airlines

• ASAP – (a) As Soon As Possible

• ASARS (a) Advanced Synthetic Aperture Radar System Airborne Search and Rescue System

• ASB – (i) Associated Student Body – Alternative Service Book (Church of England)

• asbl – (i) association sans but lucratif (French "Non-profit organisation")

• ASBO – (a) Antisocial Behavior Order

• ASCAP – (a) American Society of Composers, Authors, and Publishers

• ASCC (i) Army Service Component Commander Automatic Sequence Controlled Calculator Air Standardization Coordinating Committee

• ASCIET – (i) All Services Combat Identification Evaluation Team

• ASCII – (a) American Standard Code for Information Interchange

• ASC+T – (i) Anti Slip Control + Traction

• ASD (i) (U.S.) Assistant Secretary of Defense Autism spectrum disorder

• ASD(C3I) – (i) (U.S.) (Command, Control, Communications, & Intelligence)

• ASD(FMP) – (i) (U.S.) Assistant Secretary of Defense (Force Management Policy)

• ASD(HA) – (i) (U.S.) Assistant Secretary of Defense (Health Affairs)

• ASD(ISA) – (i) (U.S.) Assistant Secretary of Defense (International Security Affairs)

• ASD(ISP) – (i) (U.S.) Assistant Secretary of Defense (International Security Policy)

• ASD(LA) – (i) (U.S.) Assistant Secretary of Defense (Legislative Affairs)

• ASD(PA) – (i) (U.S.) Assistant Secretary of Defense (Public Affairs)

• ASD(RA) – (i) (U.S.) Assistant Secretary of Defense (Reserve Affairs)

• ASD(SO&HA) – (i) (U.S.) Assistant Secretary of Defense (Special Operations & Humanitarian Assistance)

• ASD(SO/LIC) – (i) (U.S.) (Special Operations & Low-Intensity Conflict)

• ASD(S&R) – (i) (U.S.) Assistant Secretary of Defense (Strategy & Requirements)

• ASD(S&TR) – (i) (U.S.) Assistant Secretary of Defense (Strategy & Threat Reduction)

• ASDIC – (a) Allied Submarine Detection Investigation Committee (Sonar)

• ASEAN – (a) Association of Southeast Asian Nations

• ASFAR – (a) Americans for a Society Free of Age Restrictions

• ASG – (i) Area Support Group

• ASIC – (a) Australian Securities and Investments Commission – (a) Aviation Security Identification Card

• ASICS – (a) Anima sana in corpore sano (Latin, "A sound mind in a sound body") (athletic shoe manufacturer)

• ASIO (a) Australian Security Intelligence Organisation Audio stream input output

• ASIP (i) Advanced System Improvement Program Army Stationing and Installation Plan Application-specific instruction-set processor

• ASL (i) Above Sea Level American Sign Language (also known as Ameslan) "Age, Sex, Location?" (Internet slang)

• asm – (s) Assamese language (ISO 639-2 code)

• ASM (i) Air-to-Surface Missile (s) American Samoa (ISO 3166 trigram) (i) American Society for Metals American Society for Microbiology Association Sportive Montferrandaise (French, "Clermont-Ferrand Sporting Association"), as in ASM Clermont Auvergne

• ASMB (i) American Society for Matrix Biology Adult Swim Message Board

• ASME (i) American Society of Mechanical Engineers American Society of Magazine Editors

• ASMP (i) Air-Sol Moyenne Portée missile (French "Medium-range air to surface") (p) Asymmetric multiprocessing

• ASMR - Autonomous Sensory Meridian Response

• ASN – (i) Associate of Science in Nursing

• ASOC (a/i) Air Sovereignty Operations Centre Air Support Operations Centre Airport Security and Operations Centre Antarctic and Southern Ocean Coalition Atlanta Symphony Orchestra Chorus Australian Standard Offence Classification

• ASP (i) Active Server Pages American Society of Primatologists Ammunition Supply Point Application Service Provider (cf internet service provider) Astronomical Society of the Pacific Association of Surfing Professionals

• ASPI – (i) Australian Strategic Policy Institute

• ASR (i) Alkali-silica reaction Anti Slip Regulation

• ASRAAM – (a) Advanced Short-Range Air-to-Air Missile

• ASSC – (i) Association for the Scientific Study of Consciousness

• Ass Paym – Assistant Paymaster

• AST – (i) Atlantic Standard Time (UTC−4 hours)

• ASTIA – (a) Armed Services Technical Information Agency

• ASTM – (i) American Society for Testing and Materials

• ASTREA – (a) Aerial Support To Regional Enforcement Agencies (sheriff's air support unit)

• ASUN – (p) Atlantic Sun (Conference)

• ASUW – (p) AntiSUrface Warfare

• ASVAB - Armed Services Vocational Aptitude Battery (taken by juniors in high school in the USA)

• ASVEL – (a) Association Sportive Villeurbanne Éveil Lyonnais (Association Sportive is French for "Sporting Association"; the club was founded through the merger of AS Villeurbanne and Éveil Lyonnais)

• ASW – (i) AntiSubmarine Warfare

• ASWORG – (i) (U.S.) AntiSubmarine Warfare Operations Research Group

• ASX (p) Advanced Stream Redirector Australian Securities Exchange

AT

• aT – (s) Attotesla

• At – (s) Astatine

• AT – (i) Anti-Tank – (s) Ashmore and Cartier Islands (FIPS 10-4 territory code) – Austria (ISO 3166 digram) – (i) Advanced Technology (IBM Personal Computer/AT)

• ATA – (i) Advanced Technology Attachment (IBM Personal Computer) – Afghan Transitional Authority – Allen Telescope Array – (s) Antarctica (ISO 3166 trigram)

• ATAC – (a) Air Transportable Acoustic Communications

• ATACMS – (p) Army TACtical Missile System

• ATAPI – (a) Advanced Technology Attachment Packet Interface

• ATAS – (a) Air-To-Air Stinger (missile)

• ATAT – (a) Aiken Tactical Airsoft Team / Star Wars vehicle

• ATB – (i) Active Time Battle – (s) British Antarctic Territory (ISO 3166 trigram; merged with AQ in 1979)

• ATC – (i) Air Traffic Control – Air Training Corps – U.S. Air Transport Command (1942–1948)- Athletic Trainer, Certified (www.nata.org ^[4] )

• ATCCIS – (i) Army Tactical Command and Control Information System

• ATESS – (i) Aerospace and Telecommunications Engineering Support Squadron

• ATF – (s) French Southern Territories (ISO 3166 trigram) – (i) (U.S.) Bureau of Alcohol, Tobacco, Firearms and Explosives (from its previous name, which did not include "Explosives")

• ATG – (s) Antigua and Barbuda (ISO 3166 and FIFA trigram)

• ATGM – (i) Anti-Tank Guided Missile

• ATGW – (i) Anti-Tank Guided Weapon

• ATI – (i) Allied Telesyn International, Inc. – (a) Array Technologies Incorporated. (ATI Technologies)

• Atisbo – a Local Government Area in Nigeria named for constituent communities (Ago-Are, Tede, Irawo, Sabe, Baasi, Ofiki and Owo)

• ATK – (p) Attack

• ATL – (p) Atlanta, Georgia, the largest city and capital of Georgia

• ATLAS – (a) All-Terrain Lifter Army System – (p) Assessment Tool for LAnd Systems

• ATM – (i) Automated Teller Machine – Asynchronous Transfer Mode – At The Moment

• ATN – (s) Dronning Maud Land (ISO 3166 trigram; merged with AQ in 1983)

• ATO – (i) Air Tasking Order – Australian Taxation Office

• ATP – (i) Adenosine TriPhosphate – Allied Tactical Publication – Ammunition Transfer Point

• ATSD – (p) (U.S.) Assistant Secretary of Defense

• ATSDR – (i) Agency for Toxic Substances and Disease Registry

• AT&T – (i) American Telephone and Telegraph (U.S. company, also known as "Ma Bell")

• ATV – (i) All-Terrain Vehicle

• ATWA – (a) Air, Trees, Water, Animals

AU

• Au – (s) Gold (Latin Aurum)

• AU – (i) African Union (was OAU before 2000) – American University – (s) Astronomical Unit – Australia (ISO 3166 digram) – Austria (FIPS 10-4 country code)

• AUC – (i) Ab Urbe Condita / Anno Urbis Conditae (Latin "from the founding of the city" / "in the year since the founding of the city") (of Rome) – Area Under the Curve (concentration time curve; medicine)

• AUD – (s) Australian dollar (ISO 4217 currency code)

• AUS – (s) Australia (ISO 3166 trigram)

• AUSCANNZUKUS – (p) Australia, Canada, New Zealand, United Kingdom, United States (security designation)

• Auslan – (p) Australian Sign Language

• AUT – (s) Austria (ISO 3166 trigram)

• AUTL – (i) Army Universal Task List

AV

• av – (s) Avar language (ISO 639-1 code)

• aV – (s) Attovolt

• Av – (i) Aperture value (photographic mode)

• AV (s) Anguilla (FIPS 10-4 territory code) (i) Audio-Visual (s) Aviation

• ava – (s) Avar language (ISO 639-2 code)

• AVA – (i) American Viticultural Area

• AVB – (i) Audio Video Bridging

• AVCATT-A – (p) (U.S. Army's) Aviation Combed Arms Tactical Trainer-Aviation [Reconfigurable Manned Simulator]

• AVDLR – (p) Aviation Depot Level Repair

• ave – (s) Avestan language (ISO 639-2 code)

• AVGP – (i) Armoured Vehicle, General Purpose

• AVI – (i) Audio Video Interleave

• AVIM – (p) Aviation Intermediate Maintenance

• AVLB – (i) Armoured Vehicle Launched Body

• AVM (i) Air Vice-Marshal (p) Arteriovenous malformation

• AVO – (i) Apprehended Violence Order

• AVP – (a) Arubaanse Volkspartij

• AVP – (i) Association of Volleyball Professionals

• AVRE – (i) Armoured Vehicle Royal Engineers

• AVTB (i) Armoured Vehicle Test Bed (p) Aviation Test Bed

• AVUM – (p) Aviation Unit Maintenance

• AVVO – (a) Acute Vaginal Venereal Outbreak

AW

• aW – (s) Attowatt

• AW – (s) Aruba (ISO 3166 digram)

• AWA – (i) American Wrestling Association

• AWACS – (a) Airborne Warning And Control System

• AWC – (i) Air Warfare Centre

• AWD – many, including All Wheel Drive; see entry

• AWE – (i/a) Advanced Warfighting Experiment

• AWG – (s) Aruban guilder (ISO 4217 currency code)

• AWOL – (a) Absent Without Official Leave / Absent WithOut Leave (military jargon)

• AWP – (p) Awaiting Parts (SM&R code)

• AWSIM – (p) Air Warfare SIMulation

• AWST – (a) Australian Western Standard Time

• AWW – (i) Above Water Warfare

AX

• AX – (s) Åland Islands (ISO 3166 digram)

• AXP – (p) Ambulance eXchange Point

AY

• ay – (s) Aymara language (ISO 639-1 code)

• AY – (s) Antarctica (FIPS 10-4 territory code)

• AYBABTU – (i) All Your Base Are Belong To Us

• aym – (s) Aymara language (ISO 639-2 code)

• AYU – (i) As Yet Unknown

AZ

• az – (s) Azerbaijani language (ISO 639-1 code)

• AZ (s) Arizona (postal symbol) Azerbaijan (ISO 3166 digram) (i) Alkmaar Zaanstreek (Dutch football club)

• aze – (s) Azerbaijani language (ISO 639-2 code)

• AZE – (s) Azerbaijan (ISO 3166 trigram)

• AZN – (s) Azerbaijani manat (ISO 4217 currency code)

• AZUR – (p) Actions en zone urbaine (French, Urban Operations)