PowerShell/data/abbr/general.csv

1	ABBR	MEANING
2	e.g.	'exempli gratia' in Latin, meaning: 'for example'
3	0D	obvious deed
4	1AM	Air Mechanic 1st Class
5	1D	One-Dimensional
6	2AM	Air Mechanic 2nd Class
7	2D	Two-dimensional
8	2LA	Two Letter Acronym
9	2Lt	2nd Lieutenant
10	3AM	Air Mechanic 3rd Class
11	3D	Three-Dimensional
12	3G	Third-generation mobile telephone system
13	3i	Investors In Industry (venture capitalists)
14	3M	Minnesota Mining and Manufacturing Company
15	4G	Fourth-generation mobile telephone system
16	4WD	Four-wheel drive
17	5D	Five-Dimensional
18	6D	Six-Dimensional
19	7D	Seven-Dimensional
20	8D	Eight-Dimensional
21	9D	Nine-Dimensional
22	A	Ampere
23	A/C	Air Conditioned/Conditioning
24	A10	Atlantic 10 Conference
25	A1C	Airman First Class
26	A4	European standard office paper size
27	aA	Attoampere
28	AAA	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'—Mexican professional wrestling promotion)
29	AAAS	American Association for the Advancement of Science
30	AAAV	Advanced Amphibious Assault Vehicle
31	AADAC	Alberta Alcohol and Drug Abuse Commission
32	AADD	Adult attention deficit disorder
33	AADT	annual average daily traffic
34	AAFES	Army and Air Force Exchange Service
35	AAIS	advanced airborne interceptor simulator
36	AAM	air-to-air missile
37	AAMOF	as a matter of fact
38	AAN	American Academy of Nursing
39	AANEAS	Anglo-Australian Near-Earth Asteroid Survey
40	AAODL	Atmospheric Aerosols and Optics Data Library
41	AAPC	Accounting and Auditing Policy Committee
42	AARP	American Association of Retired Persons (now officially known only by the initials)
43	AASPEM	advanced air-to-air system performance evaluation model
44	AAT	Australian Antarctic Territory
45	AAV	Amphibious Assault Vehicle
46	AAWC	anti-air warfare commander
47	AB	Able Seaman (both the rank and the occupation),Alberta (postal symbol)
48	ABB	ASEA Brown Boveri (Swiss-Swedish multinational company)
49	ABBA	Agnetha,Benny,Björn,Anni-Frid (Swedish pop group)
50	ABC	the first three letters of the Latin script known as the alphabet
51	ABC	abstinence, be faithful, condoms
52	ABC	Active Body Control
53	ABC	airway, breathing, circulation
54	ABC	Alcoholic Beverage Commission
55	ABC	alien big cat
56	ABC	always be careful
57	ABC	American-born Chinese
58	ABC	anti-lock brake controller
59	ABC	atomic, biological, chemical
60	ABCS	(U.S.) Army Battle Command System
61	ABET	Accreditation Board for Engineering and Technology
62	ABFIST	Advanced Bradley Full Crew Interactive Skills Trainer
63	ABGI	Addington-Barker Group International
64	ABIN	Agência Brasileira de Inteligência (Brazilian Intelligence Agency)
65	ABL	American Basketball League
66	ABLE	AirBorne Law Enforcement (police air support unit)
67	ABMC	American Battle Monuments Commission
68	ABN	Australian Business Number (a number issued by the Australian government as registration of a business and used for taxation purposes)
69	ABPI	Association of the British Pharmaceutical Industry
70	ABRSM	Associated Board of the Royal Schools of Music
71	ABS	anti-lock braking system
72	ABSA	Amalgamated Banks of South Africa
73	ABSTRIPS	abstraction-based STRIPS
74	ABV	Alcohol by volume
75	ABW	Aruba (ISO 3166 trigram)
76	Ac	Actinium
77	AC	Adriamycin-Cyclophosphamide (chemotherapy),Air Conditioning,Aircraftman,Alternating Current,Altocumulus,ante Christum (Latin,'before Christ'; see BC),ante cibum (Latin,'before meals'),Associazione Calcio (Italian,'football (soccer) club')
78	aC	Attocoulomb
79	AC1	Aircraftman 1st Class
80	AC2	Aircraftman 2nd Class
81	ACA	Affordable Care Act,shorthand for the Patient Protection and Affordable Care Act,commonly called 'Obamacare',Airspace Control Authority,Airspace Co-ordination Area,A Current Affair
82	ACARS	Aircraft Communications Addressing and Reporting System
83	ACB	Asociación de Clubes de Baloncesto (Spanish for 'Association of Basketball Clubs')
84	ACCAC	Awdurdod Cymwysterau,Cwricwlwm ac Asesu Cymru (Qualifications,Curriculum and Assessment Authority for Wales)
85	ACCD	American Coalition of Citizens with Disabilities
86	ACCS	Air Communications and Control Squadron
87	ACDA	Arms Control & Disarmament Agency
88	ACDC	Alternating Current Direct Current,the name of an Australian rock music band,a term for a bisexual person,A/Cdre,Air Commodore
89	ACDT	Apple Certified Desktop Technician,Australian Central Daylight Time
90	ACES	Aerolíneas Centrales de Colombia (Spanish,'Central Colombian Airlines'),Auxiliary Campus Enterprises and Services of Alfred State College
91	ACF	Administration for Children and Families,American Car and Foundry,American Culinary Federation
92	ACHT	Average Call Hold Time
93	ACINT	Acoustic Intelligence
94	ACK	Acknowledge (telecommunications; cf. NAK)
95	ACL	Access Control List,Anterior cruciate ligament; the initialism can also refer to an injury to this ligament.,Atlantic Coast Line Railroad
96	ACLJ	American Center for Law and Justice
97	ACLOS	Automatic CLOS (missile control system)
98	ACLS	American Council of Learned Societies
99	ACLU	American Civil Liberties Union,American Communist Lawyers Union (pejorative slang for the above)
100	ACM	many,including Association for Computing Machinery; see entry
101	ACMC	(U.S.) Assistant Commandant of the Marine Corps
102	ACN	Airborne Communications Node,Australian Company Number (number issued by the Australian government as registration of a limited liability company)
103	ACNA	Anglican Church in North America
104	ACO	Airspace Control Order
105	ACOBA	Advisory Committee on Business Appointments
106	ACOG	American College of Obstetricians and Gynecologists
107	ACOM	(U.S.) Atlantic Command
108	ACORN	Association of Community Organizations for Reform Now
109	ACP	African,Caribbean and Pacific Group of States,Air Control Point
110	ACR	Advanced Concepts and Requirements
111	ACRI	African Crisis Initiative
112	ACRT	Advanced Concepts Research Tool simulator
113	ACS	Affiliated Computer Services (NYSE ACS),Alaska Communications Service,American Cancer Society,American Chemical Society,Association of Caribbean States,Australian Computer Society
114	ACSC	Army Command and Staff College (various nations)
115	ACST	American Cooperative School of Tunis
116	ACST	Australian Central Standard Time
117	ACT	Adaptive Control of Thought (cognitive model),American College Test (ing Program),Australian Capital Territory (also postal symbol),ACT UP,AIDS Coalition to Unleash Power
118	ACTD	Advanced Concept Technology Demonstration
119	ACTF	(U.S.) Army Constructive Training Federation,Australian Children's Television Foundation,ACT-R,ACT-Rational (cognitive model),ACT-R/PM,ACT-R/Perceptual-Motor (cognitive model)
120	ACTU	Australian Council of Trade Unions
121	ACU	American Conservative Union
122	ACUF	Advisory Committee on Undersea Features,American Conservative Union Foundation
123	AD	Anno Domini (Latin for 'In the year of our Lord')
124	ADA	Air Defence Artillery,American Dental Association,Assistant District Attorney,Americans with Disabilities Act (see also the similar but non-acronymic Ada programming language)
125	ADAC	Allgemeiner Deutscher Automobil-Club (German for 'General German Automobile Club')
126	ADAGE	Air Defense Air to Ground Engagement (simulation)
127	ADAP	AIDS Drug Assistance Program
128	ADAS	Asiago-DLR Asteroid Survey
129	ADAT	Alesis Digital Audio Tape (recording format)
130	ADATS	Agricultural Development and Training Society,Air Defence Anti-Tank System,Australian Defence Air Traffic System
131	ADB	Asian Development Bank
132	ADC	Aide De Camp,U.S. Air Defense Command (1946-1992),Apple Display Connector,Program Against Digital Counterfeiting of Currency
133	ADD	Analog Digital Digital (CD quality),Attention-Deficit Disorder,Administration on Developmental Disabilities
134	ADDIE	Analyze Design Develop Implement and Evaluate
135	ADDNS	Advanced Deployable Day/Night Simulation
136	ADGB	Air Defence of Great Britain
137	ADHD	Attention-Deficit Hyperactivity Disorder
138	ADHS	Attention-Deficit Hyperactivity Syndrome
139	ADI	Acceptable/Allowable Daily Intake
140	ADL	Anti-Defamation League
141	ADM	Administrative,,Admiral,and the U.S. Public Health Service Commissioned Corps,Archer Daniels Midland,Assistant Deputy Minister
142	ADOA	Air Defence Operations Area
143	ADP	Adenosine DiPhosphate,Army Doctrine Publication (UK,Canada,Australia),Automatic/Automated Data Processing
144	ADRG	Arc-second Raster Chart (ARC) Digitized Raster Graphics
145	ADS	Active Denial System,Astrophysics Data System,Attention Deficit Syndrome
146	ADSR	Attack,Decay,Sustain,Release (sound envelope specification)
147	ADT	Atlantic Daylight Time (UTC−3 hours)
148	ADTB	Army Doctrine and Training Bulletin
149	ADW	Air Defence Warning
150	AE	Armed Forces Africa/Canada/Europe/Middle East (postal symbol),United Arab Emirates (ISO 3166 digram),Artix Entertainment,American Eagle,A&E, Arts & Entertainment Network,the original name for the U.S. TV channel now known as A&E Network
151	AEDT	Australian Eastern Daylight Time
152	AEF	American Expeditionary Force
153	AEGIS	Airborne Early warning Ground environment Interface Segment (fake etymology)
154	AESR	Aeronautical Equipment Service Record
155	AEST	Australian Eastern Standard Time
156	aet	After extra time (Football)
157	AEW	Airborne Early Warning,Airborne Electronic Warfare
158	AF	Afghanistan (ISO 3166 digram),Air Force,As f*ck
159	aF	Attofarad
160	AFA	U.S. Air Force Academy,Asociación del Fútbol Argentino (Spanish for 'Argentine Football Association')
161	AFAIC	As Far As I'm Concerned
162	AFAICT	As Far As I Can Tell
163	AFAIK	As Far As I Know
164	AFAIR	As Far As I Remember/Recall
165	AFAM	Associazione Friulana di Astronomia e Meteorologia (Italian,'Friuli Association of Astronomy and Meteorology'),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
166	AFATDS	Advanced Field Artillery Tactical Data System
167	AFCEA	Armed Forces Communications and Electronics Association
168	AFDB	African Development Bank
169	AFES	Automatic Fire Extinguishing System
170	AFG	Afghanistan (ISO 3166 trigram)
171	AFI	French Territory of the Afars and Issas (ISO 3166 trigram; obsolete since 1977),'Agencia Federal de Investigaciónes' (México)
172	AFIST	Abrams Full Crew Interactive Skills Trainer
173	AFJ	April Fool's Joke
174	AFK	Away From Keyboard (Internet chat abbreviation)
175	AFLAC	American Family Life Assurance Company of Columbus
176	AFO	Association of Field Ornithologists
177	AFOSR	U.S. Air Force Office of Scientific Research
178	AFP	Agence France-Presse (French,'French Press Agency'), Australian Federal Police
179	AFQT	Armed Forces Qualification Test
180	AFRC	Air Force Reserve Command
181	AFRL	Air Force Research Laboratory
182	AFROTC	Air Force Reserve Officer Training Corps
183	AFRRI	(U.S.) Armed Forces Radiobiology Research Institute
184	AFRTS	Armed Forces Radio and Television Service
185	AFSC	U.S. Air Force Staff College (obsolete; replaced with JFSC), U.S. Air Force Systems Command
186	AFSCN	U.S. Air Force Satellite Control Network
187	AFSPC	Air Force Space Command
188	AFT	American Farmland Trust
189	AFV	armoured fighting vehicle
190	AG	air gunner,Aktiengesellschaft (German,'incorporated'),Antigua and Barbuda (ISO 3166 digram),Assemblies of God
191	ag	Attogram
192	Ag	Silver (Latin for 'argentum')
193	AGA	AB Gas-accumulator ('ah-gah',Swedish company),Advanced Graphics Architecture
194	AGARD	Advisory Group for Aerospace Research and Development
195	AGARDograph	Advanced Guidance for Alliance Research and Development publication
196	AGASA	Akeno Giant Air Shower Array (cosmic ray detector)
197	AGB	Internal Nintendo initialism (Advanced Game Boy) for Game Boy Advance
198	AGC	Adjutant General's Corps (British Army)
199	AGDC	Australian Game Developers' Conference
200	AGI	Auxiliary Group Intelligence
201	AGM	Annual General Meeting
202	AGN	Active Galactic Nucleus
203	AGO	Angola (ISO 3166 trigram)
204	AGP	Accelerated Graphics Port
205	AGRICOLA	Agriculture Online Access
206	AGS	Alaska Ground Station (LandSat)
207	AGTS	Advanced Gunnery Training System
208	AGU	American Geophysical Union
209	AGW	Autonomous Guided Weapon
210	Ah	Ampere-hour
211	AH	Attack Helicopter
212	aH	Attohenry
213	AHA	American Heart Association
214	AHCPR	Agency for Health Care Policy and Research (obsolete; replaced with AHRQ)
215	AHEC	Australian Health Ethics Committee
216	AHPCRC	Army High Performance Computing Research Center
217	AHQ	Air Headquarters
218	AHRQ	Agency for Healthcare Research and Quality
219	AHS	American Housing Survey
220	AI	Air Interdiction,Amnesty International,Artificial Insemination,Artificial Intelligence,Anguilla (ISO 3166 digram)
221	AIA	Aerospace Industries Association,American Institute of Architects,Anguilla (ISO 3166 trigram)
222	AIAA	American Institute of Aeronautics and Astronautics
223	AIC	African Independent Church,Animal Identification Coordinator
224	AICD	Australian Institute of Company Directors
225	AICMFP	And I Claim My Five Pounds
226	AID	U.S. Agency for International Development
227	AIDS	Acquired Immune Deficiency Syndrome
228	AIM	Australian Institute of Management
229	AIMP	Aurora Incremental Modernization Project
230	AIPAC	American Israel Public Affairs Committee
231	AIR	Aircraft Inventory Record
232	AIRFA	American Indian Religious Freedom Act
233	AIRS	Aerometric Information Retrieval System (obsolete; replaced with AFS)
234	AIS	Australian Institute of Sport,Automatic Identification System
235	AISB	(British Society for the Study of) Artificial Intelligence and the Simulation of Behaviour
236	aJ	Attojoule
237	Ajax	Asynchronous JavaScript And XML
238	AJD	Astronomical Julian day
239	AJP	Allied Joint Publication
240	AJPW	All Japan Pro Wrestling
241	AK	Alaska (postal symbol)
242	aK	Attokelvin
243	AKA	Above knee amputation (orthopaedic usage)
244	AKDT	Alaska Standard Daylight Saving Time (UTC−8 hours)
245	AKP	Adalet ve Kalkınma Partisi (Turkish,'Justice and Development Party')
246	AKST	Alaska Standard Time (UTC−9 hours)
247	AL	Alabama (postal symbol),Albania (ISO 3166 digram),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)
248	Al	Aluminium
249	aL	Attolitre
250	ALA	Åland Islands (ISO 3166 trigram)
251	ALAP	As Long/Late As Possible
252	ALARM	Air-Launched Anti-Radar Missile
253	ALB	Albania (ISO 3166 trigram)
254	ALD	Accounting Line Designator (nuclear weapon targeting)
255	ALERT	Advanced Linked Extended Reconnaissance and Targeting,Attack and Launch Early Reporting to Theatre
256	ALF	Africa Leadership Forum,Alien Life Form (cf. ALF (TV series)),Animal Liberation Front
257	ALG	Algeria (IOC and FIFA trigram,but not ISO 3166)
258	ALGOL	ALGOrithmic Language
259	ALPA	Air Line Pilots Association
260	ALS	Amyotrophic Lateral Sclerosis
261	ALSHS	Abraham Low Self-Help Systems
262	ALSP	Aggregate Level Simulation Protocol
263	ALTE	Association of Language Testers in Europe
264	Am	Americium
265	AM	Amplitude Modulation and Ante Meridiem; see entry,Armenia (ISO 3166 digram)
266	AM1	Airman 1st class
267	AMCB	U.S. Army/Marine Corps Board
268	AMFOM	Advanced Missile Fly Out Model
269	AMFR	Age-specific Marital Fertility Rate,Amplitude Modulation Following Response
270	AMFRS	Advanced Multi-Function Radio Frequency System,Automatic Multisensor Feature-based Recognition System
271	AML	Acute Myeloid Leukaemia
272	AMLCD	Active Matrix Liquid Crystal Display
273	AMLO	Andrés Manuel López Obrador (Mexican politician),Anti-Money Laundering Office (Thailand government agency)
274	AMO	Atlantic Multidecadal Oscillation
275	AMOLED	Active-matrix organic light-emitting diode
276	AMOS	Advanced MOrtar System,Air Force Maui Optical and Supercomputing observatory
277	AMP	Adenosine MonoPhosphate,Automated Mission Planner
278	AMRAAM	Advanced Medium-Range Air-to-Air Missile
279	AMRDEC	U.S. Aviation & Missile Research,Development,& Engineering Center
280	AMS	Agriculture Marketing Service,American Mathematical Society
281	AMSAA	U.S. Army Materiel Systems Analysis Activity
282	AMSO	U.S. Army Model and Simulation Office
283	AMSU	Advanced Microwave Sounding Unit
284	AMTE	UK Admiralty Marine Technology Establishment (1977-1984)
285	AN	Netherlands Antilles (ISO 3166 digram)
286	aN	Attonewton
287	ANA	Administration for Native Americans,Afghan National Army,All Nippon Airways,Anti-Nuclear Anti-body,Australian National Airways,Australian Natives' Association
288	ANC	African National Congress
289	AND	Andorra (ISO 3166 trigram)
290	ANFO	Ammonium nitrate/fuel oil (explosive)
291	ANGLiCo	Air/Naval Gunfire Liaison Company
292	ANL	Argonne National Laboratory
293	ANM	Acoustic Noise Monitor
294	ANOVA	ANalysis Of VAriance
295	ANS	Applied and Natural Sciences
296	ANSI	American National Standards Institute
297	ANT	Netherlands Antilles (ISO 3166 trigram),Antigua and Barbuda (IOC trigram,but not ISO 3166 or FIFA)
298	ANTM	America's Next Top Model
299	ANTY	Acronyms,No Thank You
300	ANWR	Arctic National Wildlife Refuge /ˈænwɑr/
301	ANZ	Australia and New Zealand Banking Group
302	ANZAC	Australian and New Zealand Army Corps
303	AO	Angola (ISO 3166 digram),Approach Officer (submarine),Area of Operations
304	AOC	Air Operations Centre,Air Officer Commanding
305	AOD	Adrenalin O.D. (punk rock band)
306	AOI	Angle Of Incidence (Arab Organization for Industrialization)
307	AOL	America OnLine
308	AOR	Area of Responsibility
309	AOSTH	Adventures of Sonic the Hedgehog
310	AOTS	Attack of the Show!
311	AOU	American Ornithologists' Union
312	AP	Advanced Placement,Air Publication,Andhra Pradesh (Indian state code),Armed Forces Pacific (postal symbol),Associated Press,Auto Pilot
313	APB	All Points Bulletin (police jargon)
314	APEC	Asia Pacific Economic Cooperation
315	APEDS	AMSAA Performance Estimates Data System
316	APEX	Applied Physics Express
317	APHA	American Public Health Association
318	APHIS	Animal and Plant Health Inspection Service
319	APL	Acute Promyeloid Leukaemia,Anti-Personnel Landmine,Applied Physics Laboratory (Johns Hopkins University)
320	APOD	Aerial Port (Airport) Of Debarkation
321	APOE	Aerial Port (Airport) Of Embarkation
322	APOLLO	Apache Point Observatory Lunar Laser-ranging Operation
323	APP	Allied Procedural Publication
324	APR	Annual Percentage Rate
325	AQIM	Al-Qaeda in the Islamic Maghreb
326	AR	Argentina (ISO 3166 digram),Arkansas (postal symbol),Armour,Arunachal Pradesh (Indian state code)
327	Ar	Argon
328	ARAG	Advanced Research and Assessment Group
329	ARB	Administrative Review Board
330	ARBA	Army Review Boards Agency
331	ARCA	Automobile Racing Club of America
332	ARCENT	United States Army Central Command
333	ARDA	Advanced Research and Development Activity (became DTO 2006)
334	ARF	ASEAN Regional Forum
335	ARG	Argentina (ISO 3166 trigram)
336	ARH	Armed Reconnaissance Helicopter
337	ARNet	Acquisition Reform Network
338	ARP	Applied Research Programme
339	ARPA	Advanced Research Projects Agency
340	ARRC	ACE Rapid Reaction Corps
341	ARRF	Allied Rapid Reaction Force
342	ARRL	American Radio Relay League
343	ARSC	Arctic Region Supercomputing Center
344	ARSPACE	U.S. Army Space Command
345	ARTCC	Air Route Traffic Control Center
346	ARWG	Army Research Working Group
347	AS	ActionScript
348	AS	American Samoa (postal symbol; ISO 3166 digram),Assam / Asom (Indian state code)
349	As	Arsenic
350	aS	Attosiemens
351	ASA	AcetylSalicylic Acid,American Standards Association,Army Security Agency,Atlantic Southeast Airlines
352	ASAP	As Soon As Possible
353	ASARS	Advanced Synthetic Aperture Radar System,Airborne Search and Rescue System
354	asbl	association sans but lucratif (French 'Non-profit organisation')
355	ASBO	Anti-Social Behaviour Order
356	ASCAP	American Society of Composers,Authors,and Publishers
357	ASCC	Army Service Component Commander,Automatic Sequence Controlled Calculator,Air Standardization Coordinating Committee
358	ASCII	American Standard Code for Information Interchange
359	ASD	(U.S.) Assistant Secretary of Defense,autism spectrum disorder
360	ASDIC	Allied Submarine Detection Investigation Committee (Sonar)
361	ASEAN	Association of Southeast Asian Nations
362	ASFAR	Americans for a Society Free of Age Restrictions
363	ASG	Area Support Group
364	ASIC	Australian Securities and Investments Commission,Aviation Security Identification Card
365	ASICS	Anima sana in corpore sano (Latin for 'A sound mind in a sound body') (athletic shoe manufacturer)
366	ASIO	Australian Security Intelligence Organisation,Audio stream input output
367	ASIP	Advanced System Improvement Program,Army Stationing and Installation Plan,Application-specific instruction-set processor
368	ASL	Above Sea Level,American Sign Language (also known as Ameslan),'Age,Sex,Location?' (Internet slang)
369	ASM	Air-to-Surface Missile,American Samoa (ISO 3166 trigram),American Society for Metals,American Society for Microbiology
370	ASMB	American Society for Matrix Biology,Adult Swim Message Board
371	ASME	American Society of Mechanical Engineers,American Society of Magazine ors
372	ASMP	Air-Sol Moyenne Portée missile (French 'Medium-range air to surface'),Asymmetric multiprocessing
373	ASN	Associate of Science in Nursing
374	ASOC	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
375	ASP	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
376	ASPI	Australian Strategic Policy Institute
377	ASR	Alkali-silica reaction,Anti Slip Regulation
378	ASRAAM	Advanced Short-Range Air-to-Air Missile
379	ASSC	Association for the Scientific Study of Consciousness
380	AST	Atlantic Standard Time (UTC−4 hours)
381	ASTIA	Armed Services Technical Information Agency
382	ASTM	American Society for Testing and Materials
383	ASTREA	Aerial Support To Regional Enforcement Agencies (sheriff's air support unit)
384	ASUW	AntiSUrface Warfare
385	ASVAB	Armed Services Vocational Aptitude Battery(taken by juniors in high school in the USA)
386	ASVEL	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)
387	ASW	AntiSubmarine Warfare
388	ASWORG	(U.S.) AntiSubmarine Warfare Operations Research Group
389	ASX	Advanced Stream Redirector,Australian Securities Exchange
390	AT	Anti-Tank,Austria (ISO 3166 digram),Advanced Technology (IBM Personal Computer/AT)
391	At	Astatine
392	aT	Attotesla
393	ATA	Advanced Technology Attachment (IBM Personal Computer),Afghan Transitional Authority,Allen Telescope Array,Antarctica (ISO 3166 trigram)
394	ATAC	Air Transportable Acoustic Communications
395	ATAPI	Advanced Technology Attachment Packet Interface
396	ATAT	Aiken Tactical Airsoft Team / Star Wars vehicle
397	ATB	Active Time Battle,British Antarctic Territory (ISO 3166 trigram; merged with AQ in 1979)
398	ATC	Air Training Corps, U.S. Air Transport Command (1942-1948), Athletic Trainer,Certified
399	ATESS	Aerospace and Telecommunications Engineering Support Squadron
400	ATF	French Southern Territories (ISO 3166 trigram),(U.S.) Bureau of Alcohol,Tobacco,Firearms and Explosives
401	ATG	Antigua and Barbuda (ISO 3166 and FIFA trigram)
402	ATGM	Anti-Tank Guided Missile
403	ATGW	Anti-Tank Guided Weapon
404	ATK	Attack
405	ATL	Atlanta,Georgia,the largest city and capital of Georgia
406	ATLAS	All-Terrain Lifter Army System,Assessment Tool for LAnd Systems
407	ATM	At The Moment
408	ATN	Dronning Maud Land (ISO 3166 trigram; merged with AQ in 1983)
409	ATO	Air Tasking Order,Australian Taxation Office
410	ATP	Adenosine TriPhosphate,Allied Tactical Publication,Ammunition Transfer Point
411	ATSD	(U.S.) Assistant Secretary of Defense
412	ATSDR	Agency for Toxic Substances and Disease Registry
413	ATV	All-Terrain Vehicle
414	ATWA	Air,Trees,Water,Animals
415	AU	African Union (was OAU before 2000),American University,Astronomical Unit,Australia (ISO 3166 digram)
416	Au	Gold (Latin 'Aurum')
417	AUC	Ab Urbe Condita / Anno Urbis Conditae (Latin for '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)
418	AUS	Australia (ISO 3166 trigram)
419	AUSCANNZUKUS	Australia,Canada,New Zealand,United Kingdom,United States (security designation)
420	Auslan	Australian Sign Language
421	AUT	Austria (ISO 3166 trigram)
422	AUTL	Army Universal Task List
423	AV	Audio-Visual,Aviation
424	Av	Aperture value (photographic mode)
425	aV	Attovolt
426	AVA	American Viticultural Area
427	AVB	Audio Video Bridging
428	AVDLR	Aviation Depot Level Repair
429	AVGP	Armoured Vehicle, General Purpose
430	AVIM	Aviation Intermediate Maintenance
431	AVLB	Armoured Vehicle Launched Body
432	AVM	Air Vice-Marshal, Arteriovenous malformation
433	AVO	Apprehended Violence Order
434	AVP	Arubaanse Volkspartij
435	AVP	Association of Volleyball Professionals
436	AVRE	Armoured Vehicle Royal Engineers
437	AVTB	Armoured Vehicle Test Bed,Aviation Test Bed
438	AVUM	Aviation Unit Maintenance
439	AVVO	Acute Vaginal Venereal Outbreak
440	AW	Aruba (ISO 3166 digram)
441	aW	Attowatt
442	AWA	American Wrestling Association
443	AWC	Air Warfare Centre
444	AWD	All Wheel Drive
445	AWE	Advanced Warfighting Experiment
446	AWP	Awaiting Parts (SM&R code)
447	AWSIM	Air Warfare SIMulation
448	AWST	Australian Western Standard Time
449	AWW	Above Water Warfare
450	AX	Åland Islands (ISO 3166 digram)
451	AXP	Ambulance eXchange Point
452	AYBABTU	All Your Base Are Belong To Us
453	AYU	As Yet Unknown
454	AZ	Arizona (postal symbol),Azerbaijan (ISO 3166 digram),Alkmaar Zaanstreek (Dutch football club)
455	AZE	Azerbaijan (ISO 3166 trigram)
456	AZUR	Actions en zone urbaine (French for: Urban Operations)
457	BAR	Barbados (IOC trigram,but not FIFA or ISO 3166),British American Racing,Browning Automatic Rifle,Buy-American Restrictions,BARD , Binational Agricultural Research and Development fund (between the US and Israel),BARDA , Biomedical Advanced Research and Development Agency,BART , Bay Area Rapid Transit,BAS , Battalion Aid Station,BASE , Building,Antenna,Span,Earth (parachute from),BASF , Badische Anilin und Soda Fabrik (Baden Aniline and Soda Factory,a German chemicals company),BASIC , Beginner's All-purpose Symbolic Instruction Code (acronym was added later,originally it was simply Basic),BAT , Basic Aid Training,BATF , U.S. Bureau of Alcohol,Tobacco,and Firearms,BATS , Behavior Analysis Training System ,Bradley Advanced Training System,BATTeRS , Bisei Asteroid Tracking Telescope for Rapid Survey,BB[edit]
458	BB	Barbados (ISO 3166 digram),Boys' Brigade (Christian youth organization),Brigitte Bardot (actress),Bumblebee
459	BBB	Better Business Bureau,Blood-brain barrier
460	BBC	Breeding Bird Census,British Broadcasting Corporation,Bumper to Back of Cab (trucking measurement)
461	BBL	Be Back Later,Bird Banding Laboratory,British Basketball League
462	BBN	Bolt,Beranek and Newman
463	BBQ	Barbecue
464	BBS	Breeding Bird Survey (North America),Brigade/Battalion Battle Simulation,Bulletin Board System,BBSRC , U.K. Biotechnology and Biological Sciences Research Council,BBVA , Banco Bilbao Vizcaya Argentaria (Spanish bank)
465	BBYO	B'nai B'rith Youth Organization
466	BC	Before Christ,Blind Copy (in emailers),Boston College,British Columbia (postal symbol)
467	BCA	Bachelor of Computer Application,Black Coaches & Administrators
468	BCC	Blind Carbon Copy
469	BCCI	Bank of Credit and Commerce International,Board of Control for Cricket in India,BCD , Binary-Coded Decimal
470	BEA	Banque extérieure d'Algérie,British European Airways (ancestor of British Airways),British Electricity Authority,bel
471	BEL	Belgium (ISO 3166 trigram)
472	BEN	Benin (ISO 3166 trigram)
473	BEO	Banquet Event Order
474	BERC	Business Environmental Resource Center
475	BER	Bit Error Rate
476	BH	Bahrain (ISO 3166 digram)
477	BHR	Bahrain (ISO 3166 trigram)
478	BNF	Backus-Naur Form (computing), British National Formulary
479	BNICE	Biological,Nuclear,Incendiary,Chemical,and Explosive Agents
480	BNP	British National Party,Banque Nationale de Paris,a predecessor to today's BNP Paribas
481	BNS	Bank of Nova Scotia
482	BNSF	Burlington Northern Santa Fe (also AAR reporting mark)
483	BO	Back Orifice,Biarritz Olympique (French rugby union club),Bolivia (ISO 3166 digram),Body odor
484	BOAC	British Overseas Airways Corporation (predecessor of British Airways)
485	BoAML	Bank of America Merrill Lynch
486	BOC	British Orthodontic Society, British Oxygen Company
487	BÖC	Blue Öyster Cult
488	BODMAS	Brackets,Orders,Division,Multiplication,Addition,Subtraction
489	BOFH	Bastard Operator From Hell
490	BOGA	Bend Over and Grab Ankles
491	BOGOF	Buy One,Get One Free
492	BOGs	Bunch of Guys
493	BOI	Balance Of Investment,Basis Of Issue
494	BOL	Bolivia (ISO 3166 trigram)
495	BOM	Base Object Model,Bill Of Materials,Block of the Month quilting term,Business opportunity meeting
496	BOPD	Barrel of Oil Per Day
497	BOS	Battlefield Operating System
498	BOT	Balance of Trade,Botswana (IOC and FIFA trigram,but not ISO 3166),Build Operate Transfer,Bank of Thailand,BP[edit]
499	BP	Battle Position,British Petroleum (today,BP does not officially stand for anything),Bp , Bishop,BPD , Bipolar Personality Disorder,BPM , Beats Per Minute,BPMo , Business Process Mobility
500	BPV	Battlefield Planning Visualization,Bovine papillomavirus
501	BQ	British Antarctic Territory (former ISO 3166 digram; merged with AQ in 1979),Caribbean Netherlands (current ISO 3166 digram; based on the entity's alternate name of Bonaire,Sint Eustatius and Saba)
502	BR	Brazil (ISO 3166 digram) ,Bihar (Indian state code),British Rail,Break Ranks (marching band term)
503	BRA	Brazil (ISO 3166 trigram)
504	BRAG	Bicycle Ride Across Georgia
505	BRASS	Breathe,Relax,Aim,Sight,Squeeze (acronym for using a rifle)
506	BRIC	Brazil, Russia, India, and China
507	BRICS	Brazil, Russia, India, China, and South Africa
508	BSA	Birmingham Small Arms (motorcycles company),Boy Scouts of America,Brigade Support Area
509	BSatCoP	Benjamin Sniddlegrass and the Cauldron of Penguins
510	BSE	Bovine Spongiform Encephalopathy (better known as mad cow disease)
511	BSN	Baloncesto Superior Nacional (Spanish,'National Superior Basketball'; top Puerto Rican league),Bank Simpanan Nasional (Malay,'National Savings Bank'; government-owned Malaysian bank)
512	BSNL	Bharat Sanchar Nigam Limited,Bachelor of Science in Nursing
513	BSoD	Blue Screen of Death (distinct from BSD)
514	BSP	Between-Show Promotion,Binary Space Partitioning,Board Support Package,British Standard Pipe (screw thread),Business-sponsored,Bone sialoprotein
515	BST	Binary search tree,Blended Sales Tax,Bovine somatotropin,British Summer Time
516	BSW	British Standard Whitworth (screw thread)
517	BSX	Bendigo Stock Exchange
518	BT	Baal teshuva (Hebrew,'master of repentance') ,used to describe a Jew who adopts Orthodox Judaism as an adult,Bathythermograph,Bhutan (ISO 3166 digram),BitTorrent,British Telecom,the former name of the company now known as BT Group,BTDT , Been There,Done That,Bti , Bacillus thuringiensis israelensis,BTID , Battlefield Target Identification Device,BTIS , Battlefield Target Identification System
519	Bt	Baronet,Bacillus thuringiensis
520	BTO	Built To Order
521	BTP	British Transport Police
522	BTR	Bronetransporter (БТР = Бронетранспортер '(Heavy) Armoured (Personnel) Transporter')
523	BTU	British Thermal Unit
524	BTW	By The Way
525	BU	Burma (ISO 3166 digram; obsolete since 1989)
526	BUAV	British Union for the Abolition of Vivisection
527	BUG-E	Battlefield Universal Gateway Equipment ('buggy')
528	BUNO	Bureau Number (aircraft serial number)
529	BUR	Burma (ISO 3166 trigram; obsolete since 1989)
530	BV	Background Vocals -,Battlefield Visualization ,,Bouvet Island (ISO 3166 digram)
531	BVD	Bradley,Voorhees & Day (underwear manufacturer)
532	BVR	Beyond Visual Range
533	BVT	Bouvet Island (ISO 3166 trigram)
534	B&W	Babcock & Wilcox, Black and White, Bowers & Wilkins
535	BW	Bring Wedges (ISO digram)
536	BW	Botswana (ISO 3166 digram)
537	BWA	Botswana (ISO 3166 trigram)
538	BWARS	Bees,Wasps & Ants Recording Society
539	BWC	Biological and Toxin Weapons Convention
540	BWR	Boiling-Water Reactor
541	BX	Base eXchange
542	BY	Belarus (ISO 3166 digram), Bavaria
543	BYOB	Bring Your Own Bottle (or beer, beverage, or booze) (multiple,but similar,meanings)
544	BYOC	Bring Your Own Computer (play on BYOB)
545	BYOF	Bring Your Own Flask
546	BYS	Byelorussian Soviet Socialist Republic (ISO 3166 trigram; obsolete since 1992)
547	BYU	Brigham Young University
548	BZ	Belize (ISO 3166 digram)
549	BZP	Benzylpiperazine
550	C	Carbon, Coulomb, One Hundred (in Roman numerals)
551	c	Centi
552	C2C	Consumer-To-Consumer electronic commerce, Cam-To-Cam internet chat
553	c2c	the British rail company formerly known as LTS Rail
554	Ca	Calcium
555	CA	California (postal symbol),Canada (ISO 3166 digram),Catalonia,Civil Affairs,Close Armour,Cocaine Anonymous,Computer Associates,Counter-Air,Cricket Australia
556	CAA	Canadian Automobile Association,(NORAD) Center for Aerospace Analysis,(U.S.) Center for Army Analysis,(U.S.) Clean Air Act,(U.S. Army) Concepts Analysis Agency,Civil Aviation Authority,Colonial Athletic Association
557	CAAT	Campaign Against Arms Trade,Center for Alternatives to Animal Testing
558	CAC	California Association of Criminalists,Chronic Asymptomatic [Disease] Carrier
559	CACM	Central American Common Market
560	CACM	Communications of the ACM
561	CADCAM	Computer-Aided Design/Computer-Aided Manufacturing
562	CADMID	Concept,Assessment,Demonstration,Manufacture,In service,Disposal (life cycle mnemonic)
563	CADPAT	CAnadian Disruptive PATtern
564	CAE	Canadian Aviation Electronics (originally),Certificate in Advanced English
565	CAEn	Close Action Engagement (constructive simulation)
566	CAF	Central African Republic (ISO 3166 trigram),Confederation of African Football (or French Confédération Africaine de Football)
567	CAFAD	Combined Arms For Air Defence
568	CAFDE	Canadian Association of Film Distributors and Exporters,Computer Aided Federation Development Environment
569	CAFE	Corporate Average Fuel Economy standard
570	CAI	Computer Assisted Instruction
571	CAIR	Council on American-Islamic Relations
572	CALABARZON	A region in the Philippines: CAvite,LAguna,BAtangas,Rizal,queZON
573	CALL	Center for Army Lessons Learned
574	CALM	Communications,Air-interface,Long and Medium range
575	CalPERS	California Public Employees' Retirement System
576	Caltrans	California Department of Transpotation
577	CAM	Chemical Agent Monitor,Complementary and alternative medicine,Computer-Aided Manufacturing,Crassulacean acid metabolism (type of photosynthesis)
578	CAMRA	CAMpaign for Real Ale
579	CAN	Canada (ISO 3166 trigram)
580	CANDU	CANada Deuterium Uranium (nuclear reactor design)
581	Canola	Canadian oil,low acid (referring to a specific cultivar of rapeseed bred to have a low erucic acid content)
582	CAPES	CAPability Evaluation System,Combined Arms Planning and Execution System
583	CARE	Citizens Association for Racial Equality (former New Zealand organisation),Community database on Accidents on the Roads in Europe,Cooperative for Aid and Relief Everywhere (originally Cooperative for American Remittances to Europe)
584	CARMONETTE	Computerized Monte Carlo Simulation
585	CARP	Computed Air Release Point
586	CART	Championship Auto Racing Teams (now defunct)
587	CAS	Chemical Abstracts Service,Chief of the Air Staff,Close Air Support
588	CASA	Civil Aviation Safety Authority
589	CASE	Cellular ammunition storage equipment,Computer-Aided Software Engineering
590	CASS	Command Activated Sonobuoy System
591	CASTFOREM	Combined Arms and Support Task FORce Evaluation Model
592	CASTOR	Canadian Automatic Small Telescopes for Orbital Research
593	CAT	Community Acceptance Testing
594	CATK	Counterattack
595	CATS	Computer Active Technology Suspension
596	CATT	Combined Arms Tactical Trainer
597	CAV	Cavalry
598	CAVOK	Ceiling And Visibility OK ('Kav-okay')
599	CAW	Canadian Auto Workers (trade union)
600	CB	Citizens' Band radio
601	CBASSE	Commission on Behavioral And Social Sciences and Education ('sea bass')
602	CBC	Canadian Broadcasting Corporation,Christmas Bird Count,Cipher-Block Chaining,Cornering Brake Control
603	CBE	Commander of the Order of the British Empire,Cab Beside Engine (see truck)
604	CBF	Confederação Brasileira de Futebol (Portuguese,'Brazilian Football Confederation')
605	CBGB	Country,Blue Grass,and Blues (former New York City nightclub)
606	CBLA	Comparative bullet lead analysis
607	CBM	Canadian Baptist Ministries
608	CBM	Commodore Business Machines
609	CBML	Coalition Battle Management Language
610	CBN	CardsApp Brand Number
611	CBOL	Consortium for the Barcode of Life
612	CBOT	Chicago Board of Trade
613	CBP	Customs and Border Protection
614	CBR	Case-Based Reasoning
615	CBRN	Chemical,Biological,Radiological,or Nuclear (weapon or event)
616	CBRNE	Chemical,Biological,Radiological,Nuclear or [high-yield] Explosive (weapon or event)
617	CBS	Columbia Broadcasting System,Corps Battle Simulation
618	CBUS	Columbus,Ohio
619	CC	carbon copy
620	CCA	Counter Command Activity
621	CCC	Canterbury Clothing Company,Civilian Conservation Corps (U.S.,1930s and 1940s),Corpus Christi College,Oxford
622	CCCP	Central Committee of the Communist Party,Cyrillic for SSSR (Soyuz Sovetskikh Sotsialisticheskikh Respublik,Russian Союз Советских Социалистических Республик,Union of Soviet Socialist Republics)
623	CCD	Confraternity of Christian Doctrine (Catechism)
624	CCF	Cartoon Cartoon Fridays
625	CCG	Canadian Coast Guard,Collectible Card Game
626	CCGC	Canadian Coast Guard Cutter,Canadian Coast Guard College
627	CCGH	Canadian Coast Guard Hovercraft
628	CCGS	Canadian Coast Guard Ship,Christ Church Grammar School
629	CCH	Computer-Controlled Hostile
630	CCIF	Comité consultatif international des communications téléphoniques à grande distance (French for International Telephone Consultative Committee,merged with the CCIT in 1956 to form the CCITT)
631	CCII	Command and Control Information Infrastructure,Community Capital Investment Initiative
632	CCIR	Comité consultatif international pour la radio (French for Consultative Committee on International Radio,became the ITU Radiocommunication Sector,ITU-R,in 1992),Commander's Critical Information Requirements
633	CCIT	Comité consultatif international télégraphique (French for International Telegraph Consultative Committee,merged with the CCIF in 1956 to form the CCITT)
634	CCITT	Comité consultatif international téléphonique et télégraphique (French for International Telegraph and Telephone Consultative Committee,became the ITU Telecommunication Standardization Sector,ITU-T,in 1992)
635	CCK	Cholecystokinin,Cocos (Keeling) Islands (ISO 3166 trigram)
636	CCM	Canada Cycle & Motor Co. Ltd. (now split into two separate companies bearing the CCM name,one manufacturing bicycles and the other ice hockey equipment),Contemporary Christian music
637	CCOC	Canadian Children's Opera Chorus,Crosley Car Owners Club
638	CCOP	Coalition Common Operating/Operational Picture
639	CCP	Casualty Collection Point,Communications Checkpoint,Contingency Communications Package
640	CCPA	Consumer Credit Protection Act
641	CCR	Creedence Clearwater Revival
642	CCRAp	Canadian Conservative Reform Alliance party
643	CCRP	Command and Control Research Program
644	CCRTS	Command and Control Research and Technology Symposium
645	CCSCS	Consultative Committee for Space Data Systems
646	CCSCS	Coordinadora de Centrales Sindicales del Cono Sur
647	CCSIL	Command and Control Simulation Interface Language ('cecil')
648	CCSK	Cyclic Code Shift Keying
649	CCT	Current Commitments Team
650	Cd	Cadmium
651	cd	Candela
652	CD	Compact Disc
653	CD1	Cluster of Differentiation 1 (a small gene family)
654	CDA	UK Centre for Defence Analysis
655	CDD	Capabilities Development Document
656	CDE	Chemical Defence Equipment
657	CDIAC	Carbon Dioxide Information Analysis Center ('see-dee-ack')
658	CDipAF	Certified Diploma in Accounting and Finance
659	CDL	Commercial driver's license
660	CDM	Clean Development Mechanism (Kyoto protocol), Cold Dark Matter (astronomy)
661	CDMA	Code Division Multiple Access
662	CDMSII	Cryogenic Dark Matter Search II
663	Cdr	Commander
664	CDT	Central Daylight Time (UTC−5 hours)
665	Cdt	Commandant
666	Ce	Cerium
667	CE	Christian/Common Era
668	CEA	Campaign Effectiveness Analysis
669	CECOM	U.S. Army Communications and Electronics Command
670	CEDEX	Courrier d'entreprise à distribution exceptionnelle (French,'Company Mail with Exceptional Distribution'; 'exceptional' refers to the volume of mail)
671	CEGEP	Collège d'enseignement général et professionnel (French,'College of General and Vocational Education')
672	CEI	Competitive Enterprise Institute
673	CENTCOM	United States Central Command
674	CENTO	Central Treaty Organization (Baghdad Pact)
675	CENZUB	Centre d'entraînement aux actions en zone urbaine (French,'Urban Operations Training Centre')
676	CEO	Chief Executive Officer
677	CEP	Circular Error Probable
678	CEPT	Conférence européenne des administrations des postes et des télécommunications (French,'European Conference of Postal and Telecommunications Administrations')
679	CERCLA	U.S. Comprehensive Environmental Response,Compensation,and Liability Act (Superfund)
680	CERDEC	U.S. Communications-Electronics Research,Development and Engineering Center
681	CERGA	Centre de recherches en géodynamique et astrométrie (French,'Astrometry and Geodynamics Research Centre')
682	CERN	Centre européen pour la recherche nucléaire (French,'European Organization for Nuclear Research')
683	CERT	Computer Emergency Response Team
684	CESS	Centre for Earth Science Studies (India)
685	CEST	Central European Summer Time
686	CET	Central European Time
687	CEWC	Council for Education in World Citizenship
688	Cf	Californium
689	CF	Canadian Forces,Central African Republic (ISO 3166 digram)
690	CFA	Cat Fanciers' Association,Chartered Financial Analyst,Colour Filtering Array,County Fire Authority,Covering Force Area
691	CFAR	Christine's,Federal Acquisition Regulation
692	CFC	ChloroFluoroCarbon,Canadian Fish Company
693	CFES	Continuous Flow Electrophoresis System
694	CFFZ	Call For Fire Zone
695	CFG	Context-free grammar,Control flow graph
696	CFHT	Canada-France-Hawaii Telescope
697	CFI	Center for Inquiry (CSICOP)
698	CFL	Canadian Football League,Co-ordinated Fire Line
699	CFLCC	Coalition Forces Land Component Command
700	CFM	Certified Facilities Manager
701	CFO	Chief Financial Officer
702	CFP	Call for papers, College Football Playoff, Common Fisheries Policy (EU)
703	CFR	Code of Federal Regulations,Căile Ferate Române (Romanian,'Romanian Railways')
704	CFRP	Carbon fibre reinforced plastic
705	CFS	Chronic Fatigue Syndrome
706	CFSP	Common Foreign and Security Policy
707	CFU	Colony Forming Unit in Microbiology
708	CFV	Cavalry Fighting Vehicle
709	CFZ	Critical Friendly Zone
710	CG	Client Group,Computer Graphics,Controls Group,Republic of the Congo (ISO 3166 digram)
711	CGH	Comparative Genomic Hybridisation
712	CGIG	Cross-Government Implementation Group
713	CGO	Republic of the Congo (IOC and FIFA trigram,but not ISO 3166)
714	CGS	Chief of the General Staff
715	CGT	Capital Gains Tax
716	ch	ch(L) is used to denote the Chern character of a line bundle
717	CH	Chieftain tank,Switzerland (ISO 3166 digram; from Latin Confoederatio Helvetica)
718	CHAMPUS	(U.S.) Civilian Health and Medical Program of the Uniformed Services (now known as TRICARE)
719	CHAOS	Cambridge Heart Anti-Oxidant Study
720	CHAPS	Clearing House Automated Payment System
721	CHDK	Canon Hack Development Kit (Canon camera firmware hack)
722	CHE	Switzerland (ISO 3166 trigram; from Latin Confoederatio Helvetica)
723	CHI	Columbia Helicopters,Inc
724	CHiP	California Highway Patrol
725	CHIPS	Cosmic Hot Interstellar Plasma Spectrometer
726	CHL	Chile (ISO 3166 trigram)
727	CHLA	Core Historical Literature of Agriculture
728	CHN	China (ISO 3166 trigram)
729	CHOGM	Commonwealth Heads of Government Meeting
730	CHPSO	California Hospital Patient Safety Organization
731	CHRS	Canadian Heart Rhythm Society
732	CHT	Certified Hand Therapist
733	CI	Côte d'Ivoire (ISO 3166 digram),Counter-Intelligence,101 (in Roman numerals)
734	Ci	Curie
735	CIA	U.S. Central Intelligence Agency, Cairo International Airport, Culinary Institute of America
736	CIAO	Critical Infrastructure Assurance Office,Component-Integrated ACE ORB
737	CIB	Complete In Box (Internet auction/trading listings)
738	CIBC	Canadian Imperial Bank of Commerce
739	CICS	Customer Information Control System (IBM mainframe software; 'kicks' or 'C-I-C-S')
740	CID	Certified Interior Designer
741	CIEF	Comité international d'enregistrement des fréquences (International Frequency Registration Board)
742	CIF	Cost,Insurance,and Freight (Paid) (shipping)
743	CIMMYT	Centro Internacional de Mejoramiento de Maíz Y Trigo (Spanish,'International Maize and Wheat Improvement Center')
744	CINC	Commander in Chief
745	CINEOS	Campo Imperatore Near-Earth Object Survey
746	CIO	Chief information officer,Congress of Industrial Organizations
747	CIPE	(European) Centre for International Political Economy
748	CIR	(Commander's) Critical Information Requirements
749	CIR	Corotating Interaction Region
750	CIS	Canadian Interuniversity Sport,Commonwealth of Independent States,Command and Information System,Communication and Information System
751	CISA	(U.S.) C4I Integration Support Activity
752	CISB	Complete In Sealed Box (Internet auction/trading listings)
753	CISPR	Comité international spécial des perturbations radioélectriques (Special International Committee on Radio Interference)
754	CISSP	Certified Information Systems Security Professional
755	CITES	Convention on International Trade in Endangered Species (of Wild Fauna and Flora) ('sigh-tease')
756	CIV	Côte d'Ivoire (ISO 3166 trigram)
757	CIVETS	Colombia,Indonesia,Vietnam,Egypt,Turkey,South Africa (economics)
758	CIVPOP	Civilian Population
759	CIWS	Close-In Weapon System
760	CJ	Criminal Justice
761	CJC	Canadian Jewish Congress,Cold Junction Compensation
762	CJCS	Chairman of the Joint Chiefs of Staff
763	CJD	Chronological Julian Day,Creutzfeldt-Jakob Disease
764	CJO	Chief of Joint Operations
765	CJTF	Combined Joint Task Force
766	CK	Cook Islands (ISO 3166 digram)
767	CKA	commonly known as, Canada Kicks Ass
768	CKND	Codename: Kids Next Door
769	CL	Chile (ISO 3166 digram),Co-ordination Line,One Hundred and Fifty (in Roman numerals)
770	Cl	Chlorine
771	CLA	Clutterers Anonymous
772	CLEC	Competitive Local Exchange Carrier
773	CLEMARS	California Law Enforcement Mutual Aid Radio System
774	CLIC	Compact LInear Collider
775	CLO	Cornell Lab of Ornithology
776	CLOS	Command to Line-Of-Sight (missile control system)
777	CLPFC	CentroLateral PreFrontal Cortex
778	CLRP	College Loan Repayment Program
779	CM	Cameroon (ISO 3166 digram),Cruise Missile,Nine Hundred (in Roman numerals)
780	Cm	Curium
781	CMA	U.S. Chemical Materials Agency,Country Music Association (also used to refer to the organization's annual awards),Crystal Meth Anonymous
782	CMHC	Canada Mortgage and Housing Corporation
783	CMIIAW	Correct me if I am wrong
784	CMIS	Common management information service
785	CMJ	Christopher Martin-Jenkins (BBC sports commentator)
786	CMLL	Consejo Mundial de Lucha Libre (Spanish,'Worldwide Wrestling Council'—Mexican professional wrestling promotion)
787	CMMC	Corps Materiel Management Centre
788	CMML	Chronic MyeloMonocytic Leukemia,Continuous Media Markup Language
789	CMOS	Canadian Meteorological and Oceanographic Society,(The) Chicago Manual of Style,Complementary Metal Oxide Semiconductor
790	CMP	Common [Operating/Operational] Maritime Picture
791	CMPD	Charlotte Mecklenburg Police Department
792	CMPD	Chronic Myeloproliferative Disease
793	CMR	Cameroon (ISO 3166 trigram),Coaxial Main Rotors (helicopter type)
794	CMS	Centers for Medicare and Medicaid Services,The Chicago Manual of Style
795	CMT	Country Music Television
796	CMU	Carnegie Mellon University,Central Michigan University,Concrete Masonry Unit
797	CMW	Marconi's Wireless Telegraph Company of Canada,Canadian Manufacturing Week,Canadian Music Week,Catherine McAuley Westmead (school in New South Wales,Australia),Chicago,Missouri and Western (Railway),Compartmented Mode Workstation,Compton's Most Wanted,Continuous Microwave (processing technology),Custom Maintenance Wizard (Microsoft Office Resource Kit)
798	CMYK	Cyan Magenta Yellow Key/blacK (colour model)
799	CN	Canadian National (railway; also the AAR reporting mark for said company),China (ISO 3166 digram)
800	CNA	Center for Naval Analyses,Certified Network Administrator,Computer Network Attack,Continental (Casualty Company),National (Fire Insurance Company),and American (Casualty Company),the three companies that merged to form what is now known as CNA Financial
801	CNBC	Consumer News and Business Channel
802	CND	Campaign for Nuclear Disarmament,Computer Network Defence
803	CNE	Canadian National Exhibition,Computer Network Exploitation,Certified Network Engineer
804	CNF	Cost and Freight
805	CNI	Clinical Nursing Intern
806	CNI	Communications,Navigation and Identification
807	CNN	Cable News Network,Cellular Nonlinear Network
808	CNV	Copy-Number Variable (genetics)
809	Co	Cobalt
810	COB	Close Of Business [day]
811	COBRA	Consolidated Omnibus Budget Reconciliation Act of 1985
812	COD	Cash On Delivery,Democratic Republic of the Congo (ISO 3166 trigram)
813	CoDA	Co-Dependents Anonymous
814	COGENT	Cognitive Objects within a Graphical EnviroNmenT
815	COIL	Chemical Oxygen Iodine Laser
816	COK	Cook Islands (ISO 3166 trigram)
817	COL	Colombia (ISO 3166 trigram)
818	COLA	Cost Of Living Adjustment
819	CONAD	U.S. Continental Air Defense Command
820	CONMEBOL	Confederación Sudamericana de Fútbol or Confederação Sul-Americana de Futebol (respectively Spanish and Portuguese for 'South American Football Confederation')
821	CONUS	Continental United States
822	COO	Chief Operating Officer
823	COPE	U.K. Committee On Publication Ethics
824	COPUS	U.K. Committee on the Public Understanding of Science
825	CORD	Common Operational Requirements Document
826	CORE	Consortium for Oceanographic Research and Education
827	COS	Cooper Ornithological Society
828	COSER	COoperative SERvice
829	CoT	Car of Tomorrow (former NASCAR race car design)
830	COTS	Commercial Off The Shelf
831	CP	Canadian Pacific,Check Point,Command Post,Club Penguin
832	CPA	Certified Public Accountant
833	CPAC	Conservative Political Action Conference,Cable Public Affairs Channel ('see-pack')
834	CPCU	Certified Property Casualty Underwriter
835	CPD	Capabilities Production Document
836	CPE	Certificate of Proficiency in English
837	CPE	Certified Professional Ergonomist
838	CPF	Calibration Parameter File,Canadian Patrol Frigate
839	CPG	Clinical Practice Guideline
840	CPIM	Certification on Production and Inventory Management
841	CPIR	Computationally-Private Information Retrieval
842	CPON	Certified Pediatric Oncology Nurse
843	CPPCC	Chinese People's Political Consultative Conference
844	CPR	Canadian Pacific Railway
845	CPR	Cardiopulmonary resuscitation
846	CPSM	Continuous Phase Shift Modulation
847	CPSU	Communist Party of the Soviet Union
848	CPT	Contingency Planning Team
849	CPU	Contract Postal Unit
850	CPV	Cape Verde (ISO 3166 trigram)
851	CPX	Command Post eXercise
852	CQ	Carrier Qualification,Central Queensland,Charge of Quarters,Congressional Quarterly,Constellation Airlines (IATA airline designator)
853	CQD	Close Quarters Drill (Morse distress code preceding SOS: CQ 'calling all stations',D 'Distress'; often incorrectly interpreted as 'Come Quick,Distress')
854	Cr	Chromium
855	CR	Costa Rica (ISO 3166 digram)
856	CRAM	Combined Radiometric Correction Model
857	CRD	Capstone Requirements Document
858	CREB	Cyclic AMP-response Element Binding (protein)
859	CREEP	Committee for the Re-Election of the President,a pejorative nickname used by opponents
860	CREN	Christian Real Estate Network Real Estate Association
861	CRI	China Radio International,Costa Rica (ISO 3166 trigram)
862	CRIPL	Consolidated Remain-In-Place List
863	CRM	Cardiac Rhythm Management,Customer Relationship Management
864	CRO	Croatia (IOC and FIFA trigram,but not ISO 3166)
865	CRP	Committee for the Re-Election of the President,Control and Reporting Post
866	CRT	Cardiac Resynchronization Therapy,Cathode Ray Tube,Chinese Remainder Theorem
867	CRTC	Canadian Radio-television and Telecommunications Commission
868	Cs	Caesium
869	CSA	Canadian Soccer Association,Canadian Space Agency,Canadian Standards Association,Child Support Agency,Command Staff Advisor,Community-supported agriculture,Confederate States of America,Corps Storage Area,Czech Airlines,C/S/A,CINC,Service,and Agency
870	CSC	Closed Spacelike Curve (relativity),Compact system camera,Computer Sciences Corporation,Computer Security Centre,CSCC Canadian Society of Clinical Chemists
871	CSERIAC	(U.S. DoD) Crew Systems Ergonomics Information Analysis Center
872	CSG	Corps Support Group
873	CSI	see entry
874	CSICOP	Committee for the Scientific Investigation of Claims of the Paranormal (became the Committee for Skeptical Inquiry in 2006)
875	CSIP	Commercial Stable Image Platform (AMD)
876	CSIS	Canadian Security Intelligence Service ('seessiss'),(U.S.) Center for Strategic & International Studies
877	CSK	Czechoslovakia (ISO 3166 trigram; obsolete since 1993)
878	CSL	U.K. Central Science Laboratory
879	CSPI	Center for Science in the Public Interest
880	CSR	Control Supply Rate
881	CSR	Corporate Social Responsibility
882	CSRC	Conflict Studies Research Centre
883	CSRF	Cross-Site Request Forgery
884	CST	Central Standard Time (UTC−6 hours)
885	CT	Computed tomography (medical scan also known as a CAT scan),Central Time zone,Chrono Trigger (Computer/Video games),Connecticut (postal symbol),Canterbury (postal symbol),Chhattisgarh (Indian state code)
886	CTA	Central African Republic (FIFA trigram,but not ISO 3166 or IOC),Chicago Transit Authority,Comando-Geral de Tecnologia Aerospacial (Portuguese,[Brazilian] 'General Command for Aerospace Technology')
887	CTBT	Comprehensive [Nuclear] Test Ban Treaty
888	CTDB	Compact Terrain Data Base (file format)
889	CTE	Canton and Enderbury Islands (ISO 3166 trigram; obsolete 1984),Chronic traumatic encephalopathy
890	CTGF	connective tissue growth factor
891	CTI	Co-operative Target Identification
892	CTIL	Critical Tracked Items List
893	CTIS	Central Tire Inflation System
894	CTMS	Clinical Trial Management System
895	CTO	Chief Technical Officer,Chief Technology Officer
896	CTS	Clear-To-Send,Collective Training Standards,Communications Technology Service,Contract Technical Services,Conversation Time Sharing,COSMIC Top Secret
897	CTSS	Compatible Time-Sharing System
898	CTU	Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24)
899	CTVT	Canine Transmissible Venereal Tumour
900	CU	Carrie Underwood, Cuba (ISO 3166 digram)
901	Cu	Copper (Latin 'Cuprum')
902	CUB	Cuba (ISO 3166 trigram)
903	CUCV	Commercial Utility Cargo Vehicle
904	CUNY	City University of New York ('CUE-knee')
905	CUPE	Canadian Union of Public Employees ('CUE-pee')
906	CUPS	Common Unix Printing System
907	CUPW	Canadian Union of Postal Workers
908	CUREA	Consortium for Undergraduate Research and Education in Astronomy
909	CuW	Copper-tungsten pseudo-alloy (from the chemical symbols of the two component elements)
910	CUW	Curaçao (ISO 3166 trigram)
911	CV	curriculum vitae (résumé)
912	CVLL	Crypto Variable Logic Label
913	CVSD	Continuous Variable Slope Delta (modulation)
914	CVT	Continuously Variable Transmission
915	CW	Calendar Week, or: Continuous Wave, or: Clothes Washer
916	CWA	Communications Workers of America
917	CWC	Chemical Weapons Convention
918	CWRU	Case Western Reserve University
919	CWS	Canadian Wildlife Service
920	CX	Christmas Island (ISO 3166 digram),or: One Hundred and Ten (in Roman numerals)
921	CXR	Christmas Island (ISO 3166 trigram)
922	CY	Calendar year, or: Cyprus (ISO 3166 country code digram)
923	CYM	Cayman Islands (ISO 3166 trigram)
924	CZE	Czech Republic (ISO 3166 trigram)
925	CZF	(Christian Zombie Fan)
926	CZMA	(US) Coastal Zone Management Act
927	d	Deci
928	D	Deuterium
929	DA	Debtors Anonymous,U.S. Department of the Army,District Attorney
930	DADVSI	Loi sur le droit d’auteur et les droits voisins dans la société de l’information (French,'Law on copyrights and related rights in the information society')
931	DAES	Defence Acquisition Executive Summary,(UK MoD) Directorate of Analysis,Experimentation and Simulation
932	DAF	Dissolved Air Flotation,a technique used in water treatment
933	DAFIF	Digital Aeronautical Flight Information File
934	DAK	Disney's Animal Kingdom
935	DAO	Division Ammunition Officer
936	DAQ	Data acquisition,Delivered Audio Quality
937	DARE	Drug Abuse Resistance Education
938	DARO	(U.S.) Defense Airborne Reconnaissance Office
939	DARPA	U.S. Defense Advanced Research Projects Agency
940	DART	Disaster Assistance Response Team,Dublin Area Rapid Transit
941	DAS	Defensive Aids Suite
942	DASD	(U.S.) Deputy Assistant Secretary of Defense
943	DASL	Datapoint's Advanced Systems Language
944	DAU	(U.S.) Defense Acquisition University
945	DAWN	(U.S.) Drug Abuse Warning Network
946	dB	Decibel
947	DB	Deutsche Bahn
948	Db	Dubnium
949	DBA	De Bellis Antiquitatis (miniature wargaming rules)
950	DBBL	(U.S. Army Simulation Center) Dismounted Battlespace Battle Laboratory
951	DBDO	Desert BDO
952	DBE	Dame Commander of the Order of the British Empire
953	DBF	Detection By Fire (weapon launch signature)
954	DBR	De Bellis Renationis (miniature wargaming rules)
955	DBRA	Davis-Bacon Related Acts
956	DBS	Direct Broadcast Services (television)
957	DC	da capo,Italian Democrazia Cristiana,Digital Compass,Direct Current,District of Columbia (postal symbol),Douglas Aircraft Company,Dublin Core,Duty Cycle
958	DCA	Defensive Counter Air,Drum Corps Associates,DiChloroAcetate
959	DCAA	(U.S.) Defense Contract Audit Agency
960	DCAS	Devon and Cornwall Archery Society
961	DCC	Dallas Christian College
962	DCD	[Organ] Donation after Cardiac Death
963	DCE	Data Communication Equipment
964	DCFC	Death Cab for Cutie
965	DCI	Detection,Classification and Identification,Drum Corps International,Duellists' Convocation International,now known simply by the initials
966	DCL	Disney Cruise Line
967	DCN	Deacon
968	DCOM	Disney Channel Original Movie
969	DCSOPS	Deputy Chief of Staff for Operations and plans
970	DCW	Digital Chart of the World
971	DCYSC	Discovery Channel Young Scientist Challenge
972	DD	due diligence and dear daughter (increasingly prevalent on social mailing lists,blogs,and bulletin boards)
973	DDA	Deputy District Attorney
974	DDN	U.S. Defense Data Network
975	DDS	Doctor of Dental Surgery
976	DDT	Dichloro-Diphenyl-Trichloroethane (insecticide),Dynamic Debugging Tool (computing),DE[edit]
977	DE	Delaware (postal symbol),Germany (ISO 3166 digram)
978	DEA	Drug Enforcement Administration
979	DEA	Drug Enforcement Agency
980	DEC	Department of Environmental Conservation,Digital Equipment Corporation,Disasters Emergency Committee
981	DeCA	(U.S.) Defense Commissary Agency
982	DEFCON	Defence readiness condition
983	DEFRA	(UK) Department for Environment,Food and Rural Affairs
984	DELT	Dual Ended Line Test (ing)
985	DEM	Data Exchange Mechanism,Digital Elevation Model
986	DEN	Denmark (IOC and FIFA trigram,but not ISO 3166)
987	DEPSECDEF	(U.S.) Deputy Secretary of Defense
988	DERA	British Defence Evaluation and Research Agency (1995-2001)
989	DES	Deep Ecliptic Survey
990	DEU	Germany (ISO 3166 trigram)
991	DF	Direct Fire,Direction Finding,Distrito Federal (Spanish and Portuguese for 'federal district')
992	DFAS	(U.S.) Defense Finance and Accounting Service
993	DFB	Deutscher Fußball-Bund (German for 'German Football Association')
994	DFCB	Data Format Control Book
995	DfID	UK Department for International Development
996	DFM	Discrete Field Model see Superluminal motion
997	DFM	Dynamic Flowgraph Methodology
998	DFSP	Dermatofibrosarcoma protuberans
999	DfT	UK Department for Transport
1000	DFTBA	Don't Forget To Be Awesome,a term commonly used by the Vlogbrothers
1001	DG	Dei gratia (Latin,'by the grace of God'),Director-General,Data General
1002	DGA	Direction générale des armées (French 'Armed Forces General Directorate')
1003	DGPS	Differential GPS
1004	DGZ	Desired Ground Zero
1005	DHA	DocosaHexaenoic Acid
1006	DHHS	(U.S.) Department of Health and Human Services
1007	DHRA	(U.S.) DoD Human Resources Activity
1008	DHS	U.S. Department of Homeland Security
1009	DHSS	UK Department of Health and Social Security
1010	DHTFYSS	U.S. Don't Have Time For You Silly S****
1011	DHY	Dahomey (ISO 3166 trigram; became BEN for Benin in 1977)
1012	DIA	U.S. Defense Intelligence Agency
1013	DIAC	Department of Immigration and Citizenship (Australia) [1]
1014	DiC	Design Island Centre (computing usually used in a teaching situation)
1015	DICASS	DIrectional Command Activated Sonobuoy System
1016	DIFAR	DIrectional Frequency Analysis and Recording
1017	DIME	Dense Inert Metal Explosive
1018	DIP	Dual In-line Package (electronics)
1019	DIPS	Defense independent pitching statistics
1020	DIR	Defence Industrial Research
1021	DISCOM	Division Support Command
1022	DISE	Deployable Intelligence Support Element
1023	DISSTAF	DIS Search and Target Acquisition Fidelity experiment
1024	DITY	Do-It-Yourself
1025	DIVAD	Division Air Defence
1026	DIY	Do It Yourself
1027	DJI	Djibouti (ISO 3166 trigram)
1028	DK	Denmark (ISO 3166 digram)
1029	DL	Dexter's Laboratory
1030	DLIC	Detachment Left-In-Contact
1031	DLIR	Depot-Level Inspection and Repair
1032	DLPMC	DorsoLateral PreMotor Cortex
1033	DLRP	Data Link Reference Point
1034	DLS	Deep Lens Survey
1035	DLSA	(U.S.) Defense Legal Services Agency
1036	DLSc	Diploma in Library Science
1037	DLTBGYD	Don't let the bastards grind you down
1038	DMC	(U.S.) Defense Management Council
1039	DMCA	Digital Millennium Copyright Act
1040	DMM	Digital Multimeter
1041	DMOC	Distributed Mission Operations Centre
1042	DMPA	(U.S.) Defense Medical Programs Activity
1043	DMPFC	DorsoMedial PreFrontal Cortex
1044	DMPK	Drug Metabolism and Pharmacokinetics
1045	DMRB	Design Manual for Roads and Bridges
1046	DMS	U.S. Defense Message System
1047	DMSP	U.S. Defense Meteorological Satellite Program
1048	DMT	Dimethyltryptamine
1049	DMV	Department of Motor Vehicles
1050	DMZ	DeMilitarized Zone
1051	DN	Deacon
1052	DNAW	Day Night All Weather
1053	DNDi	Drugs for Neglected Diseases initiative
1054	DNDO	U.S. Domestic Nuclear Detection Office
1055	DNK	Denmark (ISO 3166 trigram)
1056	DNM	Defence Nuclear Material
1057	DNR	Do Not Resuscitate
1058	DNS	Domain Name System
1059	DO	Dominican Republic (ISO 3166 digram),Doctor of Osteopathic Medicine
1060	DOA	Dead On Arrival,Dead or Alive
1061	DOB	Date Of Birth
1062	DOD	U.S. Department of Defense
1063	DODAF	U.S. Department of Defense Architectural Framework
1064	DoDD	U.S. Department of Defense Directive
1065	DoDEA	(U.S.) Department of Defense Education Activity
1066	DOE	U.S. Department of Energy
1067	DOHC	Dual-OverHead-Cam engine
1068	DOI	U.S. Department of the Interior
1069	DORA	Defence of the Realm Act
1070	DOS	Density of State
1071	DOTA	short-form for DEFENSE OF THE ANCIENTS a popular online epic game
1072	DotD	Deal of the Day (marketing gimmick)
1073	DOW	Died of Wounds
1074	DP	Division de production (Algerian petroleum company)
1075	DPA	UK Defence Procurement Agency
1076	DPCO	Double-Pole Change Over
1077	DPDT	Double-Pole Double-Throw
1078	DPI	Dots Per Inch
1079	DPICM	Dual-Purpose Improved Conventional Munition
1080	DPKO	UN Department for Peacekeeping Operations
1081	DPMO	(U.S.) Defense Prisoner of War/Missing Personnel Office
1082	DPPDB	Digital Point Positioning Database
1083	DPRK	Democratic People's Republic of Korea
1084	DPST	Double-Pole Single-Throw
1085	DQ	Dairy Queen
1086	DR	Dead Reckoning,Danmarks Radio (Danish Broadcasting Corporation)
1087	DRC	Democratic Republic of the Congo
1088	DRDC	Defence Research & Development Canada
1089	DREA	Defence Research Establishment Atlantic (obsolete 2002)
1090	DRES	Defence Research Establishment Suffield (obsolete 2002)
1091	DRET	Defence Research Establishment Toronto (obsolete 2002)
1092	DREV	Defence Research Establishment Valcartier (obsolete 2002)
1093	DRIC	(U.S.) Defense Research Information Center
1094	DRMS	(U.S.) Defense Revitalization and Marketing Service
1095	DRPR	Drawing Practices
1096	DRT	Document Related Technologies
1097	Ds	Darmstadtium
1098	DSAS	Disney Sing Along Songs
1099	DSB	(U.S.) Defense Science Board
1100	DSCS	U.S. Defense Satellite Communications System
1101	DSCSOC	DSCS Operations Center
1102	DSE	Dry Sheep Equivalent
1103	DSG	Direct-Shift Gearbox
1104	DSID	Dismounted Soldier Identification System
1105	DSL	Digital Subscriber Line
1106	DSLR	Digital single-lens reflex (camera)
1107	DSM	Diagnostic and Statistical Manual of Mental Disorders
1108	DSN	Deep Space Network
1109	DSPL	Design Specialists and Plans Language
1110	DSR	Deformed Special Relativity
1111	DST	Daylight Saving Time
1112	DSTL	British Defence Science and Technology Laboratory
1113	DSWA	(U.S.) Defense Special Weapons Agency
1114	DTA	Dental Technologists Association
1115	DTD	Digital Terrain Data
1116	DTG	Date-Time Group
1117	DTH	Direct To Home (television)
1118	DTI	UK Department of Trade and Industry
1119	DTIC	(U.S.) Defense Technical Information Center
1120	DTL	Diode-Transistor Logic (electronics)
1121	DTMF	Dual-tone multi-frequency signaling
1122	DTO	Disruptive Technology Office (was ARDA)
1123	DTR	Determine The Relationship
1124	DTSA	(U.S.) Defense Technology Security Administration
1125	DUMBO	Down Under the Manhattan Bridge Overpass (Brooklyn neighborhood)
1126	DUSD	(U.S.) Deputy Under-Secretary of Defense
1127	DVLC	UK Driver and Vehicle Licencing Centre
1128	DVM	Doctor of Veterinary Medicine
1129	DVO	Direct View Optics
1130	DVOM	Digital Volt-Ohm Meter
1131	DVP	various meanings (disambiguation page)
1132	DW	Drum Workshop
1133	DWIM	Do What I Mean
1134	DWM	Doctor Who Magazine
1135	DWTS	Dancing with the Stars
1136	DWW	Down with Webster
1137	DXA	Dual-energy X-ray Absorptiometry
1138	DXM	DeXtroMethorphan
1139	DY	Dahomey (ISO 3166 digram; obsolete since 1977)
1140	Dy	Dysprosium
1141	DZA	Algeria (ISO 3166 trigram)
1142	E	East
1143	EABU	Explain Acronyms Before Use
1144	EAC	Echelons Above Corps
1145	EAPC	Euro-Atlantic Partnership Council
1146	EAST	Experimental Advanced Superconducting Tokamak
1147	EBD	Electronic Brake Distribution
1148	EBE	Extraterrestrial Biological Entity
1149	EBSA	Employee Benefits Security Administration
1150	EBW	Electron Beam Welding
1151	EBW	Exploding BridgeWire
1152	ECASS	European Centre for Analysis in the Social Sciences [1]
1153	ECBR	European Coalition for Biomedical Research
1154	ECCM	Electronic Counter-Counter-Measures
1155	ECFS	Electronic Case Filing System
1156	ECG	Electrocardiogram
1157	ECHR	European Convention on Human Rights
1158	ECJ	European Court of Justice
1159	ECL	Emitter Coupled Logic (electronics)
1160	ECommHR	European Commission on Human Rights
1161	ECSC	European Coal and Steel Community (distant ancestor of the EU)
1162	ECT	ElectroConvulsive Therapy
1163	ECtHR	European Court of Human Rights
1164	EDA	European Defence Agency
1165	EDAC	Error Detection And Correction
1166	EDCS	Environmental Data Coding Specification
1167	EDH	Eastman Dental Hospital
1168	EDSA	Epifanio de los Santos Avenue (a major thoroughfare in Manila with great significance to post-1980 Philippines history)
1169	EDT	Eastern Daylight Saving Time (UTC−4 hours)
1170	EEC	European Economic Community (predecessor of the EU)
1171	EEG	ElectroEncephaloGram
1172	EENT	End Evening Nautical Twilight
1173	EEO	Equal Employment Opportunity
1174	EEOC	(U.S.) Equal Employment Opportunity Commission
1175	EEZ	Economic Exclusion Zone or Exclusive Economic Zone
1176	EFF	Electronic Frontier Foundation
1177	EFL	English as a Foreign Language
1178	EFM	Enterprise Feedback Management
1179	EFOA	European Fuel Oxygenates Association
1180	EFSA	European Food Safety Authority
1181	EFT	Electronic Fund Transfer
1182	EFV	Expeditionary Fighting Vehicle
1183	EG	Egypt (ISO 3166 digram)
1184	EGCG	EpiGalloCatechin-3-Gallate
1185	EGIS	Erieye Ground Interface Segment
1186	EGRET	Energetic Gamma-Ray Experiment Telescope
1187	EGY	Egypt (ISO 3166 trigram)
1188	EHF	Extremely High Frequency
1189	EHR	Equipment History Record
1190	Ei	Exbi
1191	EIA	Environmental Impact Assessment
1192	EIAH	Encyclopedia of Iranian Architectural History
1193	EIAH	Environnements Informatiques pour l'Apprentissage Humain
1194	EIC	East India Company
1195	EICS	East India Company's Service
1196	eID	electronic ID
1197	EIRP	Effective Isotropic Radiated Power
1198	EIS	Environmental Impact Statement
1199	EJ	Exajoule
1200	EK	Exakelvin
1201	EKG	Electrocardiogram (from German Elektrokardiogramm)
1202	EKMS	Electronic Key Management System
1203	EL	Exalitre
1204	ELINT	Electronic Intelligence
1205	ELL	English Language Learner
1206	ELM	Edge-Localised Mode (plasma physics)
1207	ELO	Electric Light Orchestra
1208	ELSS	Emergency Life Support Stores
1209	EM	ElectroMagnetism/ElectroMagnetic
1210	Em	Exametre
1211	EMA	European Medicines Agency
1212	EMCON	(Electromagnetic) Emissions Control
1213	EMDG	Euro-Missile Dynamics Group
1214	EMDR	Eye Movement Desensitisation and Reprocessing
1215	EMEA	Europe,Middle East and Africa
1216	EMG	ElectroMyoGraph
1217	EMP	ElectroMagnetic Pulse
1218	EMS	Emergency Medical Services
1219	EMT	Emergency Medical Technician
1220	EN	Corps of Engineers,Exanewton
1221	ENCODE	Encyclopedia of DNA Elements (human genome data project)
1222	ENE	East North-East
1223	ENG	England (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
1224	ENTEC	Euro NATO Training Engineer Centre
1225	ENVL	Envelope
1226	ENY	Enemy
1227	EOD	Explosive Ordnance Disposal
1228	EOG	ElectroOculoGraphy
1229	EOM	End of Message
1230	EOSAT	Earth Observation Satellite
1231	EOSDIS	Earth Observation Satellite Data and Information System
1232	EP	European Parliament
1233	EP	Extended play
1234	EPCOT	Experimental Prototype Community Of Tomorrow
1235	EPGS	EOS Polar Ground Sites
1236	EPIRB	Emergency Position Indicating Radio Beacon
1237	EPL	English Premier League
1238	EPOS	Electronic Point Of Sale
1239	EPPA	Employee Polygraph Protection Act
1240	EPR	European Pressurised [Nuclear] Reactor
1241	EQ	Emotional Quotient
1242	Er	Erbium
1243	ERCIM	European Research Consortium for Informatics and Mathematics
1244	ERI	Eritrea (ISO 3166 trigram)
1245	ERLAWS	Eastern Ruapehu Lahar Alarm and Warning System
1246	EROS	Earth Resources Observation System
1247	ERP	Engineer Regulating Point
1248	ERR	Eesti Rahvusringhääling
1249	ERS	Earth Resources Survey
1250	ERTS	Earth Resources Technology Satellite (became Landsat)
1251	ERV	Endogenous RetroVirus
1252	ES	Electronic warfare Support,Exasiemens,Spain (ISO 3166 digram; from the country's native name of España)
1253	ESD	ElectroStatic Discharge
1254	ESDP	European Security and Defence Policy
1255	ESE	East South-East
1256	ESH	Western Sahara (ISO 3166 trigram)
1257	ESL	English as a Second Language
1258	ESM	Electronic warfare Support Measures
1259	ESO	European Southern Observatory
1260	ESOL	English for Speakers of Other Languages
1261	ESPN	Entertainment and Sports Programming Network
1262	ESU	Emergency Services Unit
1263	ESV	Engineer Support Vehicle
1264	ET	Ethiopia (ISO 3166 digram)
1265	ETH	Ethiopia (ISO 3166 trigram)
1266	ETI	Extra-Terrestrial Intelligence
1267	ETLA	Extended TLA
1268	ETT	Embedded Training Team
1269	EU	European Union
1270	Eu	Europium
1271	EUCOM	(U.S.) European Command
1272	EUUSA	European Union and United States of America
1273	EV	Exavolt
1274	EVIL	Electronic viewfinder (with) interchangeable lens (a type of digital camera)
1275	EWTN	Eternal Word Television Network
1276	Exatesla	Extra Terrestrial
1277	EXREP	Expeditious Repair (SM&R code)
1278	EZ	Extraction Zone
1279	f	Femto
1280	fA	Femtoampere
1281	FA	Food Addicts in Recovery Anonymous
1282	FAA	Financial Aid Administrator,Fleet Air Arm,Functional Area Analysis
1283	FAAD	Forward Area Air Defence
1284	FAADEZ	Forward Area Air Defence Engagement Zone
1285	FAAFP	Fellow of the American Academy of Family Physicians
1286	FAAN	Fellow of the American Academy of Neurology
1287	FAAN	Fellow of the American Academy of Nursing
1288	FAAQ	Frequently Asked and Anticipated Questions
1289	FAASV	Field Artillery Ammunition Supply Vehicle
1290	FAB	Feline Advisory Bureau (UK feline charity)
1291	FACA	(US) Federal Advisory Committee Act
1292	FACH	Fuerza Aérea de Chile
1293	FACN	Fellow of the American College of Nutrition
1294	FACP	Fellow of the American College of Physicians
1295	FACTS	Flexible Alternating Current Transmission System
1296	FAM	Foreign Affairs Manual
1297	FAO	Food and Agriculture Organization
1298	FAPA	Fellow of the American Psychological Association
1299	FAPHA	Fellow of the American Public Health Association
1300	FARP	Forward Arming and Refuelling Point / Forward Area Rearm/refuel Point
1301	FASCAM	Family of Scatterable Mines[1]
1302	FASD	Fetal Alcohol Spectrum Disorder
1303	FASEB	Federation of American Societies for Experimental Biology
1304	FAT	Field Artillery Tractor
1305	FAVS	Future Armoured Vehicle System
1306	FAW	Football Association of Wales
1307	FBCS	Fellow of the British Computer Society
1308	FBIDST	Fellow of the British Institute of Dental and Surgical Technologists
1309	FBIS	Foreign Broadcast Information Service
1310	FBM	Board foot
1311	fC	Femtocoulomb
1312	FCC	U.S. Federal Communications Commission
1313	FCE	First Certificate in English
1314	FCF	Financial Free Cash Flow
1315	FCLA	Fraud Claims Law Associate
1316	FCO	UK Foreign and Commonwealth Office
1317	FCW	Florida Championship Wrestling
1318	FD	Falun Dafa
1319	FDA	Food and Drug Administration (U.S.)
1320	FDBK	(I) Feedback
1321	Fe	Iron (Latin Ferrum)
1322	FEAST	Forum for European-Australian Science and Technology Cooperation
1323	FEATS	Festival of European Anglophone Theatrical Societies link title
1324	FEBA	Forward Edge of the Battle Area
1325	FED	Field Emission Display
1326	FEDEP	Federation Development Process (Simulation)
1327	FEF	Frontal Eye Field (neurophysiology)
1328	FEMA	Farm Equipment Manufacturers Association, U.S. Federal Emergency Management Agency,Fire Equipment Manufacturers' Association
1329	FENS	Federation of European Neuroscience Societies
1330	FES	Flywheel Energy Storage
1331	FEST	Frankfurt English Speaking Theatre link title
1332	FET	Field-effect transistor
1333	FEZ	Fighter Engagement Zone
1334	fF	Femtofarad
1335	FF	Final Fantasy
1336	FFB	Frum From Birth (referring to an observant Jew born into a religiously observant family)
1337	FFC	Free For Chat
1338	FFE	Fukuoka Futures Exchange
1339	FFF	Fédération française de football (French for: French Football Federation)
1340	FFG	Guided Missile Frigate (hull classification symbol)
1341	FFOV	Forward Field Of View
1342	FFR	Fédération française de rugby (French for: French Rugby (Union) Federation)
1343	FFS	For Fuck's Sake
1344	FFT	Final Fantasy Tactics
1345	FG	Falun Gong
1346	fg	Femtogram
1347	FG	Fog (METAR Code)
1348	FGOTUS	First Gentleman of the United States
1349	FGR	Flickr Group Roulette
1350	fH	Femtohenry
1351	FHFIF	Foster's Home for Imaginary Friends
1352	FHI	Family Health International, Fuji Heavy Industries,Ltd.
1353	FI	Finland (ISO 3166 digram)
1354	FIAT	Fabbrica Italiana Automobili Torino (Italian for: Italian Car Factory of Turin)
1355	FIB	Fucking Illinois Bastard (Wisconsin slang, variants exist)
1356	FIBUA	Fighting In Built-Up Areas
1357	FIC	Fellowship for Intentional Community
1358	FID	Foreign Internal Defence
1359	FIE	Fly-In Echelon
1360	FIFA	Fédération internationale de football association (French for: International Association Football Federation)
1361	FIFe	Fédération internationale féline (French for: International Feline Federation)
1362	FIFO	First In, First Out
1363	FIFRA	Federal Insecticide, Fungicide, and Rodenticide Act
1364	FIGJAM	Fuck I'm Good, Just Ask Me
1365	FIMPT	Fellow of the Institute of Maxillofacial Prosthetists and Technologists
1366	FIN	Finland (ISO 3166 trigram)
1367	FINA	Fédération internationale de natation (French for: International Swimming Federation)
1368	FIRES	Fever Induced Refractory Epilepsy Syndrome or Febrile Infection-Related Epilepsy Syndrome
1369	FIS	Fédération internationale de ski (French for: International Ski Federation)
1370	FISA	Fédération Internationale des Sociétés d'Aviron (French for: International Federation of Rowing Associations)
1371	FISH	Fluorescence In-Situ Hybridisation
1372	FiST	Fire Support Team
1373	FITS	Flexible Image Transport System
1374	FIU	Florida International University
1375	fJ	Femtojoule
1376	FJ	Fiji (ISO 3166 digram)
1377	FJI	Fiji (ISO 3166 trigram)
1378	FJN	Financial Job Network
1379	FK	Falkland Islands (ISO 3166 digram)
1380	fK	Femtokelvin
1381	FKSM	Fort Knox Supplemental Manual
1382	FKT	Fastest Known Time
1383	fL	Femtolitre
1384	FL	Florida (postal symbol)
1385	fl	floruit (Latin for: living) (genealogy)
1386	FLA	Florida,Front Line Assembly,Future Large Aircraft
1387	FLAB	Four-letter abbreviation
1388	FLAC	Free Legal Advice Centres
1389	FLAC	Free Lossless Audio Codec
1390	FLAK	Flug-Abwehr-Kanone (German for: Anti-Aircraft Guns)
1391	FLB	Forward Logistics Base
1392	FLET	Forward Line of Enemy Troops
1393	FLG	Falun Gong
1394	FLIP	Flight Information Publication
1395	FLIR	Forward Looking InfraRed (sensor)
1396	FLK	Falkland Islands (ISO 3166 trigram)
1397	FLOT	Forward Line of Own Troops
1398	FLOTUS	First Lady of the United States (the wife of the President of the United States)
1399	FLQ	Free Legal Questions
1400	FLQ	Front de libération du Québec (French for: Québec Liberation Front)
1401	FLSA	Fair Labor Standards Act
1402	FLTSAT	Fleet Satellite
1403	FLTSATCOM	Fleet Satellite Communication System
1404	FLUBOS	Fat, Lazy, Useless, Bag Of Shit
1405	FM	Factory Mutual
1406	FM	Federal Magistrate (Australian post-nominal),Federated States of Micronesia (postal symbol; ISO 3166 digram),Field Manual,Flight Manager,Frequency Modulation (electronics)
1407	fm	Femtometre
1408	Fm	Fermium
1409	FMC	Federal Magistrates' Court (an Australian federal court,formerly FMS),Food Machinery Corporation (original name of the company now known as FMC Corporation)
1410	FMCA	Federal Magistrates' Court of Australia (used for citing decisions of the FMC other than family law decisions)
1411	FMCAfam	Federal Magistrates' Court of Australia: family (used for citing family law decisions of the FMC)
1412	FMCG	Fast Moving Consumer Goods
1413	FME	Formal Methods Europe
1414	FMECA	Failure Modes and Effect Criticality Analysis
1415	FMJD	Fédération Mondiale du Jeu de Dames
1416	FMLA	Family Medical Leave Act
1417	FoE	Friends of the Earth
1418	FOGC	Federal Oil and Gas Council
1419	FOH	Front Of House
1420	FOIA	Freedom of Information Act
1421	FOM	Federation Object Model
1422	FONSI	Finding of No Significant Impact
1423	FOO	Forward Observation Officer
1424	FOOP	Friends Of Organ Pipes (Volunteer group)
1425	FoS	Family of Systems
1426	FOSE	Fallout 3 Script Extender
1427	FOSE	Federal Office Systems Expo
1428	FOT	Free on truck
1429	FOTA	Fellow of the Orthodontic Technicians Association
1430	FOTC	Flight of the Conchords
1431	FOUO	For Official Use Only
1432	FPF	Federação Portuguesa de Futebol (Portuguese for: Portuguese Football Federation), Final Protective Fire
1433	FPS	Fire Prevention System
1434	FQ	French Southern and Antarctic Territories (ISO 3166 digram; obsolete 1979)
1435	FR	France (ISO 3166 digram)
1436	Fr	Francium
1437	FRA	Federal Railroad Administration, France (ISO 3166 trigram)
1438	FRAND	Fair,reasonable,and non-discriminatory (concept in standards-setting and intellectual property law)
1439	FRCP	Federal Rules of Civil Procedure,Fellow of the Royal College of Physicians
1440	FRICBM	Full Range ICBM
1441	FRO	Faroe Islands (ISO 3166 trigram)
1442	FRS	Fellow of the Royal Society, U.S. Federal Reserve System
1443	FRSA	Fellow of the Royal Society of Art
1444	FRY	Federal Republic of Yugoslavia
1445	fs	Femtosecond
1446	fS	Femtosiemens
1447	FSA	Fire Support Area, UK Food Standards Agency, Functional Solution Analysis
1448	FSC	Federal Supply Classification, Forest Stewardship Council (ecological pressure group)
1449	FSCL	Fire Support Co-ordination Line
1450	FSE	Fire Support Element
1451	FSF	Free Software Foundation
1452	FSH	Follicle Stimulating Hormone
1453	FSI	Fuel Stratified Injection
1454	FSS	Fire Support Station
1455	FSSP	Families of Structurally Similar Proteins
1456	FSTC	Foreign Science Technology Center (now NGIC)
1457	fT	Femtotesla
1458	FTC	Federal Trade Commission
1459	FTE	Full Time Equivalent
1460	FTL	Faster Than Light
1461	FTS	Flight Termination System used during some rocket launches
1462	FTS	Fuck That Shit
1463	FU	Smoke (METAR Code)
1464	FUBAR	Fucked/Fouled Up Beyond All Recognition/Repair
1465	fV	Femtovolt
1466	fW	Femtowatt
1467	FW	Forward
1468	FWC	Football World Cup
1469	FWF	Fixed Word Format
1470	FWI	French West Indies
1471	FWIW	For What It's Worth
1472	FWS	U.S. Fish and Wildlife Service
1473	FWT	Fresh Water Tank
1474	FXX	Metropolitan France (ISO 3166 trigram; obsolete 1997)
1475	FYA	For Your Agenda
1476	FYDP	Five-Year Defense Plan (U.S.)
1477	FYI	For Your Information
1478	FYROM	Former Yugoslav Republic of Macedonia
1479	FZDZ	Freezing Drizzle (METAR Code)
1480	FZFG	Freezing Fog (METAR Code)
1481	FZRA	Freezing Rain (METAR Code)
1482	g	Gram
1483	G3	Heckler & Koch G3
1484	GAAR	General Anti-Avoidance Rule (tax evasion)
1485	GAB	Gabon (ISO 3166 trigram)
1486	GABA	Gamma-AminoButyric Acid
1487	GAD	Generalized Anxiety Disorder
1488	GAF	Garfield and Friends
1489	GAO	U.S. Government Accountability Office
1490	GAW	Global Atmospheric Watch
1491	GB	United Kingdom of Great Britain and Northern Ireland (ISO 3166 digram) [glamour boy 7-9/10]
1492	GBBC	Great (Global) Backyard Bird Count
1493	GBE	Knight/Dame Grand Cross of the Order of the British Empire
1494	GBR	United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram)
1495	GCA	Graduate in Claims Administration
1496	GCD	see entry
1497	GCF	Greatest Common Factor
1498	GCI	Ground-controlled interception
1499	GCN	Gamma-ray burst Coordination Network
1500	GCS	Global Coordinate System
1501	GCSE	General Certificate of Secondary Education (UK)
1502	Gd	Gadolinium
1503	GD	Grenada (ISO 3166 digram)
1504	GDL	Game Definition Language
1505	GDR	General Distribution Release (Microsoft Term for a software service release; between Hotfix and Service Pack)
1506	GDR	German Democratic Republic (cf. DDR)
1507	GDW	Game Designers Workshop
1508	Ge	Germanium
1509	GEBCO	General Bathymetric Chart of the Oceans
1510	GEC	Great Engineering Challenge
1511	GED	General Educational Development (high school equivalency credential in the U.S. and Canada)
1512	GEEP	Geophysical Equipment Exploration Platform
1513	GEN	Full General (four stars) in the U.S. Army
1514	GeV	Gigaelectron-volt
1515	GEV	Ground Effect Vehicle
1516	GFCI	Ground Fault Circuit Interruptor (aka GFI)
1517	GFI	Ground Fault Interruptor (aka GFCI)
1518	GFL	German Football League (Germany's Bundesliga for American football; the English-language name is used in German without translation)
1519	GFN	Global Footprint Network
1520	GGK	Good God Karma
1521	GHA	Ghana (ISO 3166 trigram)
1522	GHB	gamma-Hydroxybutyric acid
1523	Gi	Gibi
1524	GIB	Gibraltar (ISO 3166 trigram)
1525	GIG	Global Information Grid
1526	GINO	Godzilla In Name Only
1527	GISS	General Impression of Size and Shape,Goddard Institute for Space Studies
1528	GJ	Gigajoule,Gujarat (Indian state code)
1529	GJD	Geocentric Julian Day
1530	GK	Gigakelvin
1531	GLAAD	Gay and Lesbian Alliance Against Defamation
1532	GLAC	General Ledger Accounting Code
1533	GLAST	Gamma-ray Large Area Space Telescope
1534	GLBA	Gramm-Leach-Bliley Act
1535	GLC	Gas-liquid chromatography
1536	GLP	Guadeloupe (ISO 3166 trigram)
1537	GLV	Gained Life Value
1538	Gm	Gigametre
1539	GM	The Gambia (ISO 3166 digram),GameMaster (role-playing),General Motors,Genetically Modified,Guru Meditation (computing)
1540	GMAC	General Motors Acceptance Corporation,the original name of the company now known as Ally Financial,Graduate Management Admission Council,G-MAC,Great Midwest Athletic Conference
1541	GMB	The Gambia (ISO 3166 trigram),General,Municipal,Boilermakers (and Allied Trade Union)
1542	GMFSC	Ground Mobile Forces Satellite Communications
1543	GMO	Genetically Modified Organism
1544	GMPCS	Global Mobile Personal Communications by Satellite
1545	GNAS	Grand National Archery Society
1546	GNB	Guinea-Bissau (ISO 3166 trigram)
1547	GNP	Gross National Product
1548	GNQ	Equatorial Guinea (ISO 3166 trigram)
1549	GnRH	Gonadotropin-Releasing Hormone
1550	GOA	General of the Army (United States only)
1551	GOAT	Greatest Of All Time
1552	GOC	General Officer Commanding
1553	GOES	Geostationary Operational Environmental Satellite
1554	GOP	Grand Old Party
1555	gorp	granola,oats,raisins,peanuts (another name for trail mix),probably a backronym
1556	GOSC	General Officer Steering Committee
1557	GOSH	Great Ormond Street Hospital
1558	GOSP	Gas/Oil Separation Plant
1559	GOTS	Government off-the-shelf
1560	GOYADIN	Get Off Your Arse,Do It Now (anti-procrastination mantra)
1561	GP	General Practitioner,General Purpose,Grand Prix,Guadeloupe (ISO 3166 digram)
1562	GPA	Grade Point Average
1563	GPC	Global Path Cache
1564	GPIB	General-Purpose Instrumentation/Interface Bus
1565	GPO	General Post Office
1566	GPPC	Genetics and Public Policy Center
1567	GPR	Ground-Penetrating Radar
1568	GPS	General Problem Solver,Global Positioning System
1569	GPT	General Purpose Technology, Get paid to surf (an online business model)
1570	GQ	Equatorial Guinea (ISO 3166 digram),Gentlemen's Quarterly (the original name of the magazine now known simply as GQ),GR[edit]
1571	GR	Greece (ISO 3166 digram),Hail (METAR Code)
1572	GRAIL	Gravity Recovery and Interior Laboratory
1573	GRAS	Generally recognized as safe (FDA list)
1574	GRB	Gamma-Ray Burst
1575	GRC	Greece (ISO 3166 trigram)
1576	GRD	Grenada (ISO 3166 trigram)
1577	GRE	Graduate Record Examination,Greece (IOC and FIFA trigram,but not ISO 3166)
1578	grep	[search] Globally for Regular Expression,Print [lines]
1579	GRID	Gay-Related Immune Deficiency (original name of AIDS)
1580	GRid	Global Release Identifier,a music industry identifier from the RIAA and IFPI
1581	GriT	Girl raised in Texas (Woman presenting firm southern traits/beliefs)
1582	GRL	Greenland (ISO 3166 trigram)
1583	GRN	Grenada (IOC and FIFA trigram,but not ISO 3166),Goods Received Note
1584	Gs	Gigasecond
1585	GSA	U.S. General Services Administration
1586	GSD	Graphical Situation Display
1587	GSGB	(God send glamour boy 9-10/10)
1588	GSK	GlaxoSmithKline [good sexual karma]
1589	GSN	Game Show Network
1590	GSO	General Services Officer (U.S. Department of State)
1591	GSOH	Good Sense Of Humour
1592	GSP	Georges St-Pierre (Canadian MMA fighter)
1593	GSR	Gun Shot Residue
1594	GSS	Generic Security Services
1595	GSW	Gunshot wound
1596	GTD	Getting Things Done
1597	GTG	Got To Go (Internet chat)
1598	GTGN	Getty Thesaurus of Geographic Names
1599	GTK	Good To Know (Internet chat)
1600	GTM	Guatemala (ISO 3166 trigram)
1601	GU	Guam (postal symbol; ISO 3166 digram)
1602	GUF	French Guiana (ISO 3166 trigram)
1603	GUILT	Gangliated Utrophin Immuno Latency Toxin
1604	GULCR	Grupo de Usuarios de Linux de Costa Rica
1605	GUT	Grand Unification Theory
1606	GV	Gigavolt
1607	GWARS	Ground Warfare System (simulation)
1608	GWAS	Grand Western Archery Society
1609	GWOT	Global War on Terrorism
1610	GXE	Gene-enivronment interaction
1611	GXM	Matrox Graphics eXpansion Module
1612	GY	Guyana (ISO 3166 digram)
1613	GZ	Ground Zero
1614	GZK	Greisen-Zatsepin-Kuzmin cut-off (cosmic ray energies)
1615	h	Hecto
1616	H	Henry
1617	H1	First half of the year
1618	H2	Second half of the year
1619	HA	High Availability
1620	HAARP	High Frequency Active Auroral Research Program
1621	HAART	Highly Active Anti-Retroviral Therapy
1622	HAI	Human Awareness Institute
1623	HAL	Hardware Abstraction Layer
1624	HALO	High Altitude Low Opening (parachute jump)
1625	HAM	Amateur radio operator
1626	HANS	Head And Neck Support (device used in many race cars)
1627	HARM	High-speed Anti-Radiation Missile
1628	HAW	Heavy Antitank Weapon
1629	HAWK	Homing All the Way Killer (air defence system)
1630	HAZ	Heat-Affected Zone
1631	HAZMAT	Hazardous Materials
1632	HBCD	HexaBromoCycloDodecane
1633	HBO	Home Box Office
1634	HBR	Harvard Business Review
1635	HBT	Heterojunction Bipolar Transistor
1636	HBV	Hepatitis B Virus
1637	HCCI	Homogeneous Charge Compression Ignition
1638	HCF	Highest Common Factor
1639	HCSC	Higher Command and Staff Course
1640	HDL	High-Density Lipoprotein
1641	HDM	Human Decision-Making
1642	HDRA	Henry Doubleday Research Association
1643	He	Helium
1644	HE	High Explosive
1645	HEAT	High Explosive Anti-Tank (ammunition)
1646	HEBA	Hellenic Basketball Clubs Association
1647	HEER	High-Explosive Extended Range (ammunition)
1648	HEIC	Honourable East India Company
1649	HEMP	High-Altitude Electromagnetic Pulse
1650	HEOSS	High Earth Orbit Space Surveillance
1651	HEP	High-Explosive Plastic (ammunition)
1652	HEPA	High-Efficiency Particulate Air (filter)
1653	HESV	Heavy Engineering Support Vehicle
1654	HETT	Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
1655	HEU	Highly Enriched Uranium
1656	Hf	Hafnium
1657	HF	High Frequency
1658	HFE	Human Fertilisation and Embryology (UK Act)
1659	HFE	The common-emitter current gain in a BJT transistor (also represented by βF). See: BJT
1660	HFEA	Human Fertilisation and Embryology Authority (UK)
1661	Hg	Mercury (Latin Hydrargyrum)
1662	HGC	UK Human Genetics Commission
1663	HGF	Human Growth Factor
1664	HGTV	Home & Garden Television
1665	HI	Hawaii (postal symbol)
1666	HIH	His (or Her) Imperial Highness
1667	HIM	His (or Her) Imperial Majesty
1668	HIMAD	High to Medium Altitude Air Defence (see also H/MAD)
1669	HIMEZ	High Altitude Missile Engagement Zone
1670	HIMYM	How I Met Your Mother
1671	HIPAA	U.S. Health Insurance Portability and Accountability Act
1672	Hipparcos	HIgh Precision Parallax COllecting Satellite
1673	Hird	Hurd of interfaces representing depth (cf. HURD)
1674	HiRISE	High Resolution Imaging Science Experiment
1675	HIT	Health Information Technology
1676	HIV	Human Immunodeficiency Virus
1677	HIWT	Hobart Institute of Welding Technology
1678	HJD	Heliocentric Julian Day
1679	HK	Hong Kong (ISO 3166 digram)
1680	HKG	Hong Kong (ISO 3166 trigram)
1681	HKS	HyperKinetic Syndrome
1682	hL	Hectolitre
1683	HL	Holding Line
1684	HLL	High-Level Language
1685	HLN	Headline News
1686	HLOS	High Level Output Specification
1687	HM	Heard Island and McDonald Islands (ISO 3166 digram)
1688	HMCE	Her/His Majesty's Customs and Excise (former UK government department; succeeded by HM Revenue and Customs)
1689	HMD	Heard and McDonald Islands (ISO 3166 trigram)
1690	HMF	HydroxyMethyl Furfural
1691	HMO	Health maintenance organization
1692	HMP	Her Majesty's Prison
1693	HMRC	Her/His Majesty's Revenue and Customs
1694	HMSO	Her Majesty's Stationery Office
1695	HMV	His Master's Voice
1696	HN	Honduras (ISO 3166 digram)
1697	HND	Honduras (ISO 3166 trigram)
1698	Ho	Holmium
1699	HOLLAND	Hope Our Love Lasts And Never Dies
1700	HOSTAC	Helicopter Operations from Ships Other Than Aircraft Carriers
1701	HOT	Highly Optimised Tolerance
1702	HOTAS	Hands on throttle-and-stick
1703	HOV	High Occupancy Vehicle
1704	hp	horse power
1705	HPA	UK Health Protection Agency
1706	HPCL	Hindustan Petroleum Corporation Limited
1707	HPLC	High Performance Liquid Chromatography
1708	HPT	High[er] Payoff Target
1709	HPV	Human Papilloma Virus
1710	HQ	HeadQuarters
1711	HRBL	High-level Representation of Behavior Language (original name of the Herbal language)
1712	HRD	Human Resource Development
1713	HRF	High iness Forces
1714	HRH	His (or Her) Royal Highness
1715	HRM	His (or Her) Royal Majesty
1716	HRM	Human Resource Management
1717	HRT	Hormone Replacement Therapy
1718	Hs	Hassium
1719	HSBC	The Hong Kong and Shanghai Banking Corporation
1720	HSC	Higher School Certificate
1721	HSM	High School Musical
1722	HSMAD	Human Science/Modeling and Analysis Data
1723	HSN	Home Shopping Network
1724	HSPH	Harvard School of Public Health
1725	HSSI	High-Speed Serial Interface
1726	HST	see entry
1727	HTA	HyperText Application
1728	HTFU	Harden The Fuck Up
1729	HTH	Hope That Helps
1730	HTI	Haiti (ISO 3166 trigram)
1731	HTR	Heated Towel Rail
1732	HTS	High-Temperature Superconducting wire
1733	HTTP	HyperText Transfer Protocol
1734	HU	Hungary (ISO 3166 digram)
1735	HUHA	Head up his/her ass (Marine salute; probably a backcronym)
1736	HUN	Hungary (ISO 3166 trigram)
1737	HURD	Hird of Unix-Replacing Daemons (cf. Hird)
1738	HV	Upper Volta (ISO 3166 digram; obsolete 1984)
1739	HVAP	High Velocity Armour Piercing (ammunition)
1740	HVHF	High velocity human factors
1741	HVM	High Velocity Missile
1742	HVO	Upper Volta (ISO 3166 trigram; obsolete 1984)
1743	HWM	Hardware morphing (computer graphics rendering)
1744	HXB	The glycoprotein Tenascian C
1745	HZ	Haze (METAR Code)
1746	Hz	Hertz
1747	IA	Iowa (postal symbol)
1748	IAAL	I Am A Lawyer
1749	IAB	International Association for Biologicals
1750	IAD	Ion Assisted Deposition
1751	IADS	Integrated Air Defence System
1752	IAEA	International Atomic Energy Agency
1753	IAF	{i} Industrial Areas Foundation
1754	IAFG	Information Assurance Focus Group
1755	IANA	Internet Assigned Numbers Authority
1756	IANAL	I Am Not A Lawyer
1757	IAS	Image Assessment System
1758	IASIP	It's Always Sunny in Philadelphia
1759	IATA	International Air Transport Association
1760	IATF	International Automotive Task Force
1761	IATSE	International Alliance of Theatrical Stage Employees
1762	IAUC	International Astronomical Union Circular
1763	IAW	In Accordance With
1764	IB	International Baccalaureate
1765	IBA	Important Bird Area
1766	IBD	Inflammatory Bowel Disease
1767	IBDM	Information Based Decision Making
1768	IBM	International Business Machines
1769	IBRD	International Bank for Reconstruction and Development (part of the World Bank)
1770	IBS	Irritable Bowel Syndrome
1771	IC	Ice Crystals (METAR Code),Integrated Circuit,[inner circle]
1772	ICANN	Internet Corporation for Assigned Names and Numbers
1773	ICAO	International Civil Aviation Organization
1774	ICBM	Intercontinental Ballistic Missile
1775	ICBN	International Code of Botanical Nomenclature
1776	ICE	In case of emergency, Immigration and Customs Enforcement
1777	ICES	International Council for the Exploration of the Sea
1778	ICF	Intelligent Community Forum
1779	ICMP	Internet Control Message Protocol
1780	ICNAF	International Commission for the Northwest Atlantic Fisheries (became NAFO in 1978)
1781	ICO	Intermediate Circular Orbit
1782	ICPE	International Conference on Pharmacoepidemiology,the annual conference of the International Society for Pharmacoepidemiology
1783	ICRAF	International Centre for Research in Agroforestry (a.k.a. World Agroforestry Centre since 2002)
1784	ICRISAT	International Crops Research Institute for the Semi-Arid Tropics
1785	ICRL	Individual Component Repair List
1786	ICRS	International Celestial Reference System
1787	ICSI	Intracytoplasmic Sperm Injection
1788	ICT	Information and communication technologies
1789	ICTH	Island Closest to Heaven/Hell Final Fantasy VIII
1790	ICV	Infantry Carrier Vehicle
1791	ICYMI	In Case You Missed It
1792	ID	Idaho (postal symbol),Identity,Indonesia (ISO 3166 digram),Infantry Division,Intelligent Design,ID10T Error,Idiot User Error (IT help desk inside joke)
1793	IDC	International Data Corporation
1794	IDDI	I don't do initialisms (see irony)
1795	IDGAF	I don't give a fuck
1796	IDK	I don't know
1797	IDL	Interface Definition Language
1798	IDN	Indonesia (ISO 3166 trigram)
1799	IEA	International Energy Agency
1800	IEC	International Electrotechnical Commission
1801	IED	Improvised Explosive Device
1802	IELTS	International English Language Testing System
1803	IER	Information Exchange Requirement
1804	IET	Initial Entry Training
1805	IET	Institution of Engineering and Technology
1806	IETF	Internet Engineering Task Force
1807	IEW	Intelligence and Electronic Warfare
1808	IFAB	International Football Association Board
1809	IFAH	International Federation for Animal Health
1810	IFAP	International Federation of Agricultural Producers
1811	IFO	Identified Flying Object (see also UFO)
1812	IFOV	Instantaneous Field of View
1813	IFPI	International Federation of Phonographic Industries
1814	IFRB	International Frequency Registration Board
1815	IFV	Infantry Fighting Vehicle
1816	IG	Inspector General
1817	IGNOU	Indira Gandhi National Open University
1818	IGS	International Ground Station
1819	IHH	Idiopathic Hypogonadotropic Hypogonadism
1820	IHO	International Hydrographic Organization
1821	IHR	Institute for Historical Review
1822	IHSI	Institutum Historicum Societatis Iesu (Jesuit Historical Institute)
1823	II	Two (in Roman numerals)
1824	IICA	Inter-American Institute for Cooperation on Agriculture
1825	IIE	Innovative Interstellar Explorer
1826	III	Three (in Roman numerals)
1827	IIRC	If I Recall/Remember Correctly
1828	IISS	International Institute for Strategic Studies
1829	IJN	Imperial Japanese Navy (World War II)
1830	IJWP	Interim Joint Warfare Publication
1831	ILDS	Improved Landmine Detection System
1832	ILO	International Labour Organization
1833	ILRI	International Livestock Research Institute
1834	ILY	I Love You [pronounced ILL-LEE]
1835	IM	Instant Message (internet speech)
1836	IMBD	International Migratory Bird Day
1837	IMDb	Internet Movie Database
1838	IME	In My Experience
1839	IMHO	In My Humble/Honest Opinion
1840	IML	International Mister Leather
1841	IMNSHO	In My Not So Humble Opinion
1842	IMPAC	International Merchant Purchase Authorization Card
1843	IMPACT	International Medical Products Anti-Counterfeiting Taskforce
1844	IMPATT	IMPact Avalanche Transit Time diode
1845	IMPT	Institute of Maxillofacial Prosthetists and Technologists
1846	IMRL	Individual Material iness List
1847	IMRO-Internal Macedonian Revolutionary Organization	Irish Music Rights Organisation
1848	IMsL	International Ms. Leather
1849	IMT	Integrated Management Tool
1850	IMU	International Mathematical Union
1851	IN	India (ISO 3166 digram),Indiana (postal symbol),Infantry
1852	In	Indium
1853	INA	Immigration and Nationality Act
1854	INAS	International Near-Earth Asteroid Survey
1855	INCITS	InterNational Committee for Information Technology Standards
1856	IND	India (ISO 3166 trigram)
1857	INDIGO	(U.S.) INtelligence DIvision Gaming Operation
1858	inet	the Internet
1859	INFORMS	(U.S.) Institute for Operations Research and the Management Sciences
1860	INFOSEC	Information Security
1861	INLA	Irish National Liberation Army
1862	INMARSAT	International Maritime Satellite organization
1863	INRIA	Institut national de recherche en informatique et en automatique
1864	INS	Immigration and Naturalization Service
1865	InSAR	Interferometric synthetic aperture radar
1866	INST	Information Standards and Technology
1867	INTERFET	International Force for East Timor
1868	INTSUM	Intelligence Summary
1869	IO	British Indian Ocean Territory (ISO 3166 digram)
1870	IOT	British Indian Ocean Territory (ISO 3166 trigram)
1871	IPB	Intelligence Preparation of the Battlefield
1872	IPL	Inferior Parietal Lobule
1873	IPO	Initial Public Offering
1874	IPT	Integrated Product/Project Team
1875	IPTS	Institute for Prospective Technological Studies
1876	IPTV	Internet Protocol TeleVision
1877	IPW	Interrogation of Prisoners of War
1878	Ir	Iridium
1879	IRAD	Internal Research and Development
1880	IRAN	(I) Inspect and Repair As Necessary
1881	IRAS	Infrared Astronomical Satellite
1882	IRB	International Rugby Board
1883	IRBM	Intermediate Range Ballistic Missile
1884	IREA	Intermountain Rural Electric Association
1885	IRINN	Islamic Republic of Iran News Network
1886	IRL	Ireland (ISO 3166 trigram),Industrial Research Limited,Indy Racing League,In real life
1887	IRN	Iran (ISO 3166 trigram)
1888	IRO	International Refugee Organisation
1889	IRQ	Iraq (ISO 3166 trigram)
1890	IRS	U.S. Internal Revenue Service
1891	IRST	Infra-red Search and Track
1892	IS	Iceland (ISO 3166 digram)
1893	ISAAA	International Service for the Acquisition of Agri-biotech Applications
1894	ISAR	Inverse SAR (Synthetic Aperture Radar)
1895	ISB	Intermediate Staging Base
1896	ISBN	International Standard Book Number (ISO 2108)
1897	ISCCP	International Satellite Cloud Climatology Project
1898	ISCII	Indian Standard Code for Information Interchange
1899	ISDN	Integrated Services Digital Network
1900	ISEF	Intel International Science and Engineering Fair
1901	ISEN	Internet Search Environment Number
1902	ISF	Internal Security Force
1903	ISIL	Islamic State of Iraq and the Levant
1904	ISIS	Institute for Science and International Security, or: Islamic State of Iraq and Syria
1905	ISL	Iceland (ISO 3166 trigram)
1906	ISLN	International Standard Lawyer Number (used initially by LexisNexis Martindale-Hubbell)
1907	ISMB	International Society of Matrix Biologists
1908	ISMC	Intelligent Sounding Meaningless Conversation
1909	ISOGP	Indian Society of Orthodontics for General Practitioners [2]
1910	ISPE	International Society for Pharmacoepidemiology
1911	ISRO	Indian Space Research Organisation
1912	ISSCR	International Society for Stem Cell Research
1913	ISSN	International standard serial number (ISO 3297)
1914	ISTC	Institute of Scientific and Technical Communications (UK)
1915	ISTS	Intel Science Talent Search
1916	ITA	Italy (ISO 3166 trigram)
1917	ITAG	Inertial Terrain-Aided Guidance
1918	ITALY	I'll Truly Always Love You
1919	ITAS	Improved Target Acquisition Sight
1920	ITC	InferoTemporal Cortex (neurophysiology)
1921	ITCZ	Intertropical Convergence Zone
1922	ITEC	Information Technology Exposition & Conference
1923	ITEMS	Interactive Tactical Environment Management System
1924	ITER	International Thermonuclear Experimental Reactor
1925	ITF	International Tennis Federation
1926	ITK	In The Know
1927	ITN	Independent Television News (British)
1928	ITT	International Telephone and Telegraph (U.S.)
1929	ITTO	International Tropical Timber Organization
1930	IUCN	International Union for the Conservation of Nature and Natural Resources (World Conservation Union)
1931	IV	Four (in Roman numerals),IntraVenous (as in intravenous drip or intravenous therapy)
1932	Iveco	Industrial Vehicles Corporation
1933	IVF	In Vitro Fertilisation
1934	IVI	Interchangeable Virtual Instrument
1935	IVIS	Inter-Vehicle Information System
1936	IVL	Inter-Visibility Line
1937	IVM	In Vitro [Oocyte] Maturation
1938	IVO	In Vicinity Of
1939	IW	Information Warfare
1940	IWARS	Infantry Warrior Simulation
1941	IWC	International Whaling Commission
1942	IWW	Industrial Workers of the World
1943	IX	Nine (in Roman numerals)
1944	IXT	IntraText digital library; IntraText lexical hypertext
1945	J	Joule
1946	J1	Joint [Manpower &] Personnel Directorate
1947	J2	Joint Intelligence Directorate
1948	J3	Joint Operations Directorate
1949	J4	Joint Logistics Directorate
1950	J5	Joint Strategic Plans & Policy Directorate
1951	J7	Joint Operational Plans & Interoperability Directorate
1952	JAFT	Just A Field Test
1953	JAL	Japan Airlines
1954	JALLC	Joint Analysis and Lessons Learned Centre (NATO)
1955	JAM	Jamaica (ISO 3166 trigram)
1956	JAMA	Journal of the American Medical Association
1957	JANET	Joint Academic Network
1958	JATO	Jet-Assisted Take-Off
1959	JB	Jail Bait
1960	JB	Junior Branch
1961	JBFSA	Joint Blue Force Situational Awareness
1962	JCDB	Joint Common Data Base
1963	JCDS	Joint Chiefs of the Defence Staff
1964	JCIDS	Joint Capabilities Integration and Development System
1965	JCL	Job Control Language
1966	JCP	Java Community Process
1967	JCS	Joint Chiefs of Staff
1968	JCW	Juggalo Championship Wrestling
1969	JDBC	Java Data Base Connectivity
1970	JDEM	Joint Dark Energy Mission
1971	JDL	Jewish Defense League
1972	JEFX	Joint Expeditionary Force eXperiment
1973	JET	Joint European Torus
1974	JEZ	Joint Engagement Zone
1975	JFACC	Joint Force Air Component Commander
1976	JFACTSU	U.S. Joint Forward Air Control Training and Standards Unit
1977	JFC	Joint Force Commander
1978	JFK	John Fitzgerald Kennedy or the airport named after him.
1979	JFLCC	Joint Force Land Component Commander
1980	JFMCC	Joint Force Maritime Component Commander
1981	JFO	Journal of Field Ornithology
1982	JFSOCC	Joint Force Special Operations Component Commander
1983	JFTX	Joint Field Training Exercise
1984	JH	Japan Highway Public Corporation
1985	JH	Jharkhand (Indian state code)
1986	JI	Joint Implementation
1987	JIB	Joint Information Bureau
1988	JIC	Joint Intelligence Centre
1989	JINI	Java Intelligent Network Infrastructure
1990	JITC	Joint Interoperability Test Command
1991	JIVE	Joint Institute for VLBI (Very Long Baseline Interferometry) in Europe
1992	JJAP	Japanese Journal of Applied Physics
1993	JL	Japan Airlines (IATA airline designator)
1994	JLA	Justice League of America
1995	JM	Jamaica (ISO 3166 digram)
1996	JMS	Java Message Service
1997	JO	Jordan (ISO 3166 digram)
1998	JOA	Joint Operations Area
1999	JOPES	Joint Operations Planning and Execution System
2000	JOR	Jordan (ISO 3166 trigram)
2001	JOTS	Joint Operations Tactical System
2002	JPL	Jet Propulsion Laboratory
2003	JPN	Japan (ISO 3166 trigram)
2004	JPOW	Joint Project Optic Windmill
2005	JRDF	Joint Rapid Deployment Forces
2006	JRE	Java Runtime Environment
2007	JREF	James Randi Educational Foundation
2008	JROC	Joint Requirements Oversight Council
2009	JROCM	JROC Memorandum
2010	JRRF	Joint Rapid Reaction Force
2011	JRSAI	Journal of the Royal Society of Antiquaries of Ireland
2012	JSAP	Japan Society of Applied Physics
2013	JSCSC	Joint Services Command and Staff College
2014	JSEAD	Joint Suppression of Enemy Air Defence (see SEAD)
2015	JSF	Joint Strike Fighter
2016	JSIMS	Joint Simulation System
2017	JSOA	Joint Special Operations Area
2018	JSOTF	Joint Special Operations Task Force
2019	JSP	JavaServer Page
2020	JSP	Joint Services Publication
2021	JSR	Java Specification Request
2022	JSS	Joint Support Ship Project
2023	JTC	Joint Training Confederation
2024	JTF	Joint Task Force
2025	JTFEX	Joint Task Force Exercise
2026	JTLS	Joint Theater Level Simulation
2027	JTMD	Joint Theatre Missile Defence
2028	JTN	Johnston Atoll (ISO 3166 trigram; obsolete 1986)
2029	JUGFET	JUnction Gate Field-Effect Transistor
2030	JUICE	JUpiter ICy Moon Explorer
2031	JUO	Joint Urban Operations
2032	JV	Joint Venture,Junior Varsity
2033	JW	Jehovah's Witnesses
2034	JWARS	Joint Warfare System (simulation)
2035	JWP	Joint Warfare Publication
2036	JY	Japanese Yen
2037	JZ	Joint Zone
2038	K	Kelvin,Potassium (Latin Kalium),Tanker (aircraft designation code)
2039	k	Kilo-
2040	K	picokelvin
2041	K9	Canine Police Unit
2042	Ka	Kamov Design Bureau
2043	kA	Kiloampere
2044	KA	Knowledge Acquisition,Karnataka (Indian state code)
2045	KAF	Kandahar Air Field
2046	KANUKOKA	Kalaallit Nunaanni Kommunit Kattuffiannit (Kalaallisut, Greenlandic Communities Association
2047	KARNAC	Knowledge Aided Retrieval in Activity Context
2048	KARR	Knight Automated Roving Robot (Knight Rider character)
2049	KATUSA	Korean Augmentation To United States Army
2050	KAZ	Kazakhstan (ISO 3166 trigram)
2051	KBE	Knight Commander of the Order of the British Empire
2052	KBO	Kuiper Belt Object
2053	KBVB	Koninklijke Belgische Voetbalbond (Dutch for Royal Belgian Football Association)
2054	kC	Kilocoulomb
2055	KCK	Kansas City,Kansas,Koma Civakên Kurdistan (Kurdish, Union of Communities in Kurdistan)
2056	KCL	King's College London
2057	KCMO	Kansas City,Missouri (pronounced: K-C-Moe)
2058	KCS	Kansas City Southern Railway (AAR reporting mark)
2059	KD	Kawasaki Disease,Kraft Dinner
2060	KE	Kenya (ISO 3166 digram),Kinetic Energy,Knowledge Engineering
2061	KEDO	Korean Peninsula Energy Development Organization
2062	KEN	Kenya (ISO 3166 trigram)
2063	KERA	Kentucky Education Reform Act (of 1990)
2064	kerma	Kinetic Energy Released in MAterial / in MAtter / per unit MAss
2065	KESR	Kent and East Sussex Railway.
2066	KET	Kentucky Educational Television,Key English Test
2067	kF	Kilofarad
2068	KFC	Kentucky Fried Chicken
2069	KFOR	UN Kosovo Force
2070	KFUPM	King Fahd University of Petroleum & Minerals
2071	KG	Kyrgyzstan (ISO 3166 digram)
2072	KGO	Knight of the Guelphic Order of Hanover
2073	KGZ	Kyrgyzstan (ISO 3166 trigram)
2074	KH	Cambodia (ISO 3166 digram)
2075	kH	Kilohenry
2076	KHL	Kontinental Hockey League
2077	KHM	Cambodia (ISO 3166 trigram)
2078	KHz	Kilohertz
2079	Ki	Kibi
2080	KI	Kiribati (ISO 3166 digram)
2081	KIA	Killed In Action
2082	KIDS	Knowledge-based Integrated Design System
2083	KIR	Kiribati (ISO 3166 trigram)
2084	KISS	Keep It Simple,Stupid / Keep It Short and Simple,Korean Intelligence Support System
2085	KIT	Keep In Touch
2086	KITECH	Korean Institute of Industrial Technology
2087	KITT	Knight Industries Two Thousand, Knight Industries Three Thousand
2088	kJ	Kilojoule
2089	kK	Kilokelvin
2090	KKK	Ku Klux Klan
2091	kL	Kilolitre
2092	KLENOT	KLEť Observatory Near Earth and Other unusual objects observations Team and Telescope
2093	KLOC	Kilo Lines Of Code
2094	KM	Comoros,Knowledge Management
2095	kN	Kilonewton
2096	KNA	Saint Kitts and Nevis (ISO 3166 trigram)
2097	KNVB	Koninklijke Nederlandse Voetbal Bond (Dutch for Royal Dutch Football Association)
2098	KO	Knocked Out
2099	KOR	Republic of Korea (ISO 3166 trigram)
2100	KP	Kim Possible
2101	KPMG	Klynveld,Peat,Marwick,Goerdeler
2102	KPNO	Kitt Peak National Observatory
2103	KQ	Kenya Airways (IATA airline designator)
2104	KR	Kiribati (FIPS 10-4 country code), Republic of Korea (ISO 3166 digram)
2105	Kr	Krypton
2106	KS	Kansas (postal symbol)
2107	kS	Kilosiemens
2108	KSC	Kennedy Space Center
2109	KSI	Killed or Seriously Injured
2110	KSU	Kansas State University
2111	KT	Knight of the Order of the Thistle, Knights Templar
2112	kT	Kilotesla
2113	KTS	Knight of the Tower and Sword (of Portugal)
2114	KUW	Kuwait (UNDP country code,IOC and FIFA trigram,but not ISO 3166)
2115	kV	Kilovolt
2116	KV	Kosovo
2117	kW	Kilowatt
2118	KW	Kuwait (ISO 3166 digram)
2119	KWB	Kids' WB!
2120	KWT	Kuwait (ISO 3166 trigram)
2121	KX	Cayman Airways (IATA airline designator)
2122	KY	Cayman Islands (ISO 3166 digram), Kentucky (postal symbol)
2123	KZ	Kazakhstan (ISO 3166 digram)
2124	KZN	KwaZulu-Natal
2125	La	Lanthanum
2126	LA	Laos (ISO 3166 digram), Louisiana (postal symbol), Los Angeles
2127	LAAS	Local Area Augmentation System, Los Angeles Astronomical Society
2128	LAB	Logistics Assault Base
2129	LabVIEW	Laboratory Virtual Instrumentation Engineering Workbench
2130	LACMA	Los Angeles County Museum of Art
2131	LAD	Laser Aiming Device
2132	LADW	Local Air Defence Warning
2133	LAESI	Local Authority & Emergency Service Information
2134	LANL	Los Alamos National Laboratory
2135	LAO	Laos (ISO 3166 trigram)
2136	LAR	Light Armoured Reconnaissance, Logistics Assistance Representative
2137	LARC	Livermore Advanced Research Computer (cf. LLNL)
2138	LARP	Live-Action Role-Playing
2139	Laser	Light Amplification by Stimulated Emission of Radiation (cf. Maser)
2140	LAT	Lowest Astronomical Tide (nautical charts),Licensed Athletic Trainer (used in many of the United States; see www.oata.org)
2141	LATA	Local Access Transport Area
2142	LATCH	Lower Anchors and Tethers for Children (U.S. standard for attachment points for child safety seats in passenger cars)
2143	LAV	Land Assault Vehicle, Light Armoured Vehicle, Lymphadenopathy-Associated Virus
2144	LAW	Light Antitank Weapon
2145	LAX	Los Angeles International Airport, The Latin American Xchange (professional wrestling)
2146	LB	Lebanon (ISO 3166 digram)
2147	LBH	Light Battlefield Helicopter, Lyman-Birge-Hopfield bands
2148	LBJ	Lady Bird Johnson,LeBron James,Light Bulb Joke,Little Beagle Johnson (the dog owned by Lyndon and Lady Bird Johnson),Lyndon Baines Johnson
2149	LBN	Lebanon (ISO 3166 trigram)
2150	LBNL	Lawrence Berkeley National Laboratory
2151	LBR	Liberia (ISO 3166 trigram)
2152	LBS	Location-Based Services
2153	LBT	Large Binocular Telescope
2154	LBW	Leg Before Wicket
2155	LBY	Libya (ISO 3166 trigram)
2156	LCA	Saint Lucia (ISO 3166 trigram)
2157	LCC	Land Component Commander
2158	LCCP	Light Contingency Communications Package
2159	LCD	Liquid Crystal Display
2160	LCM	Least/Lowest Common Multiple
2161	LCS	League of Legends Championship Series
2162	LDA	Lateral Drift Apparatus (paratroops)
2163	LDC	Lesser Developing/Developed Country
2164	LDL	Low-Density Lipoprotein
2165	LDV	Local Defence Volunteers (British Home Guard)
2166	LDW	Lane Departure Warning (ADAS)
2167	LEC	Local Exchange Carrier
2168	LED	Light-Emitting Diode
2169	LEGAD	Legal Advice
2170	Legs	level emotion gad speed
2171	LEMOSS	Long-Endurance MObile Submarine Simulator
2172	LEN	Large Extension Node
2173	LEP	Large Electron-Positron collider
2174	LER	Loss-Exchange Ratio
2175	LEU	Low-Enriched Uranium
2176	LF	Low Frequency
2177	LFO	Low Frequency Oscillation / Oscillator
2178	LFTR	Liquid fluoride thorium reactor
2179	LGB	Lesbian,Gay,Bisexual
2180	LGBT	Lesbian,Gay,Bisexual,Transgender
2181	LGBTQ	Lesbian,Gay,Bisexual,Transgender,Queer
2182	LGLO	Love God,Love Others
2183	LGM	Little Green Men
2184	LGS	Landsat Ground Station
2185	LH	Luteinising Hormone
2186	LHC	Large Hadron Collider
2187	LHS	Left Hand Side
2188	LI	Fifty-one (in Roman numerals),Liechtenstein (ISO 3166 digram)
2189	Li	Lithium
2190	LIBOR	London Interbank Offered Rate
2191	LIBS	Laser Induced Breakdown Spectroscopy
2192	LIE	Liechtenstein (ISO 3166 trigram)
2193	LIGO	Laser Interferometer Gravitational-Wave Observatory
2194	LINEAR	Lincoln Near-Earth Asteroid Research
2195	LISA	Laser Interferometer Space Antenna
2196	LIVE	Liquid Inertial Vibration Eliminator
2197	LJJ	Lord Justices of Appeal
2198	LK	Sri Lanka (ISO 3166 digram)
2199	LKA	Sri Lanka (ISO 3166 trigram)
2200	LKR4	Linkwitz-Riley 4th order (audio crossover type)
2201	LLAD	Low Level Air Defence
2202	LLB	Legum Baccalaureus (Latin: Bachelor of Laws)
2203	LLC	Limited Liability Company
2204	LLLTV	Low-Light Level Television
2205	LLNL	Lawrence Livermore National Laboratory
2206	LLP	Limited Liability Partnership
2207	LLTR	Low-Level Transit Route
2208	LMAO	Laughing My Ass Off (Internet shorthand)
2209	LMB	Lick My Balls
2210	LMFAO	Laughing My F**king Ass Off (Internet shorthand,electro-hop duo)
2211	LMN	Lifetime Movie Network
2212	LMS	Like My Status (Internet shorthand)
2213	LMV	() Light Motor Vehicle
2214	LNER	London and North Eastern Railway
2215	LNG	Liquefied Natural Gas
2216	LNO	Liaison Officer
2217	LNR	Ligue Nationale de Rugby (French for: 'National Rugby League')
2218	LOA	Limit Of Advance
2219	LOC	Level of Operational Capability, Limited Operational Capability
2220	LOD	Limit of Detection,see Detection limit
2221	LoD	Lines of Development (UK)
2222	LOFAR	Low Frequency Analysis and Recording
2223	LOGPAC	Logistics Package
2224	LOL	Laughing Out Loud (Internet shorthand)
2225	LOMEZ	Low Altitude Missile Engagement Zone
2226	LONEOS	Lowell Observatory Near-Earth-Object Search
2227	LOOGY	Lefty One-Out GuY,a sometimes pejorative nickname for the left-handed specialist in baseball
2228	LORTID	LOng Range Target IDentification
2229	LOS	Line Of Sight
2230	LOSAT	Line-Of-Sight Anti-Tank (missile)
2231	LOTA	Licentiate of the Orthodontic Technicians Association
2232	LOTIS	Livermore Optical Transient Imaging System
2233	LOTS	Logistics Over-The-Shore
2234	LP	Linkin Park,Linkup Point,Listening Post,Long Playing record,Louisiana Pacific (cf. LP Field)
2235	LPC	Linear Predictive Coding
2236	LPD	Landing Platform Dock (Navy hull classification),Low Probability of Detection
2237	LPG	Liquefied Petroleum Gas (cf. LNG)
2238	LPI	Low Probability of Intercept
2239	LPS	Landsat Processing System,LipoPolySaccharide
2240	Lr	Lawrencium
2241	LR	Liberia (ISO 3166 digram)
2242	LRC	Logistics iness Center
2243	LRGW	Long-Range Guided Weapon
2244	LRICBM	Limited Range ICBM
2245	LRIP	Low Rate Initial Production
2246	LRP	Logistics Release Point
2247	LRPE	Long-Range Planning Element
2248	LRS	Long Range Surveillance
2249	LRU	Line-Replaceable Unit
2250	LSAT	Law School Admission Test (often pronounced as 'el-SAT')
2251	LSI	Large-Scale Integration
2252	LSIF	Labour Sponsored Investment Fund
2253	LSND	Liquid Scintillator Neutrino Detector
2254	LSO	Lesotho (ISO 3166 trigram)
2255	LSST	Large Synoptic Survey Telescope
2256	LST	Landing Ship,Tank (World War II; also known,not entirely affectionately,as 'Large Slow Target')
2257	LSVW	Light Support Vehicle,Wheeled
2258	LT	Lithuania (ISO 3166 digram)
2259	Lt	Lieutenant
2260	LtC	Lieutenant-Colonel (U.S.)
2261	LTC	Long-Term Costing
2262	Ltd	Limited
2263	LTDP	Long-Term Defence Plan
2264	LTG	Lieutenant General,Lightning (METAR Code)
2265	LTI	Linear Time-Invariant
2266	LTM	Acronym for Laughing To Myself
2267	LTP	Long-Term Potentiation
2268	LTU	Lithuania (ISO 3166 trigram)
2269	LU	Acronym Love You
2270	LU	Loonatics Unleashed
2271	Lu	Lutetium
2272	LUCA	Last Universal Common Ancestor
2273	LUG	Linux User Group
2274	LULU	Locally Unwanted Land Use (urbanism)
2275	LUT	Limited User Test (ing),Local User Terminal
2276	LUVW	Light Utility Vehicle,Wheeled
2277	LUX	Luxembourg (ISO 3166 trigram)
2278	LV	Las Vegas,Latvia (ISO 3166 digram),Launch Vehicle,Leading Vehicle,Leave,Left Ventricle,Level Valve,Linking Verb,Liverpool Victoria
2279	LVA	Latvia (ISO 3166 trigram)
2280	LVAD	Left Ventricular Assist Device,Low-Velocity Airdrop
2281	LVEF	Left Ventricular Ejection Fraction
2282	LW	Land Warrior,Low Water (nautical charts)
2283	Lw	Lawrencium (obsolete 1963)
2284	LWR	Laser warning receiver
2285	LWRC	Land Warfare Resources Corporation
2286	LWS	Land Warrior System
2287	LX	Electrics (theatrical term)
2288	LX	Luxembourg (amateur radio ITU prefix),Swiss International Air Lines (IATA code)
2289	LY	Libya (ISO 3166 digram),Lithuania (amateur radio ITU prefix)
2290	LYAO	Laugh Your Ass Off
2291	LYLAS	Love You Like A Sister
2292	LZ	Bulgaria (amateur radio ITU prefix),Landing Zone
2293	M	Mega-,One thousand (in Roman numerals)
2294	m	Metre,Milli
2295	MA	Marijuana Anonymous,Master of Arts,Massachusetts (postal symbol),Megaampere,Morocco (ISO 3166 digram)
2296	Ma	Megaannum
2297	mA	Milliampere
2298	MAA	Mathematical Association of America
2299	MAAC	Metro Atlantic Athletic Conference
2300	MACE	Multi-Agent Computing Environment
2301	MACHO	MAssive Compact Halo Object
2302	MADD	Mothers Against Drunk Driving,MyoAdenylate Deaminase Deficiency,Multiply-Add
2303	MAF	Maintenance Action Form
2304	MAGIC	Major Atmospheric Gamma-ray Imaging Cherenkov (telescope)
2305	MAGNETAR	Metaprogrammable AGent NETwork ARchitecture
2306	MAGTF	Marine Air-Ground Task Force
2307	Mahasz	Magyar Hanglemezkiadók Szövetsége (Hungarian for: 'Association of Hungarian Record Companies')
2308	MALD	Miniature Air-Launched Decoy
2309	MANPADS	MAN-Portable Air Defence System
2310	MANPRINT	MANpower and PeRsonnel INTegration
2311	MAO	Molėtų astronomijos observatorija (Moletai Astronomical Observatory),MonoAmine Oxidase
2312	MAOI	Monoamine oxidase inhibitor
2313	MAPS	Monitoring Avian Productivity and Survivorship
2314	MAR	Morocco (ISO 3166 trigram)
2315	MarBEF	Marine Biodiversity and Ecosystem Functioning
2316	MARCENT	United States Marine Forces Central Command
2317	MARFORCC	Marine Force Component Commander
2318	MASAS	Monte Agliale Supernovae and Asteroid Survey
2319	Maser	Microwave Amplification by Stimulated Emission of Radiation
2320	MASH	Mobile Army Surgical Hospital
2321	MASINT	Measurement And Signature Intelligence
2322	MAVS	Mobile Artillery Vehicle System
2323	MB	Manitoba (postal symbol),Medal of Bravery (Canada)
2324	MBA	Main Battle Area,Main Belt Asteroid,Masters of Business Administration
2325	MBBL	(U.S. Armor Center) Mounted Battlespace Battle Laboratory
2326	MBCC	Migratory Bird Conservation Commission (U.S.)
2327	MBCS	Multi-Byte Character Set
2328	MBI	Moody Bible Institute
2329	MBIDST	Member of the British Institute of Dental and Surgical Technologists
2330	MBM	Meat and Bone Meal
2331	MBT	Main Battle Tank
2332	MBTI	Myers-Briggs Type Indicator
2333	mC	Millicoulomb
2334	MCDL	Model Composition Definition Language
2335	MCFT	Modified Compression Field Theory
2336	MCG	Melbourne Cricket Ground
2337	MCIS	Mellon Collie and the Infinite Sadness
2338	MCM	Mine Counter-Measures
2339	MCMV	Mine Counter-Measure Vessel
2340	MCR	My Chemical Romance
2341	MCSF	Marine Corps Security Forces
2342	MCT	Movement Control Team
2343	MCTIS	Mounted Co-operative Target Identification System
2344	Md	Mendelevium
2345	MDNA	Madonna's 12th studio album title (2012)
2346	MDO	Membership Driven Organisation
2347	MDP	Markov Decision Process
2348	MDT	Mountain Daylight Time (UTC-6 hours)
2349	MDV	Maldives (ISO 3166 trigram)
2350	Me	Messerschmitt
2351	MEAC	Mid-Eastern Athletic Conference (ME-ac)
2352	MECO	Main engine cutoff (NASA code for point in Space Shuttle assent when three main engines are shut down prior to External Tank (ET) separation)
2353	MEDEVAC	Medical evacuation
2354	MEDS	Mission Essential Data Set
2355	MEG	MagnetoEncephaloGraphy
2356	MELT	Metallic Line/Loop Test (ing)
2357	MEMS	Microelectromechanical System
2358	MER	Mars Exploration Rover
2359	MERL	Mitsubishi Electric Research Laboratories
2360	MES	Manufacturing Execution Systems
2361	METAR	[Meteorological] Aviation Routine weather report
2362	METOC	Meteorological and Oceanographic
2363	MeV	Megaelectronvolt
2364	MEX	Mexico (ISO 3166 trigram)
2365	MEZ	Missile Engagement Zone
2366	MF	Megafarad
2367	mF	Millifarad
2368	MG	Machine Gun,Madagascar (ISO 3166 digram),Major General,Morris Garage
2369	MGPAM	My Gym Partner's a Monkey
2370	MGS	Mobile Gun System
2371	mH	Millihenry
2372	MHC	Major Histocompatibility Complex
2373	MHHW	Mean Higher High Water (nautical charts)
2374	MHL	Marshall Islands (ISO 3166 trigram)
2375	MHLW	Mean Higher Low Water (nautical charts)
2376	MHRA	(UK) Medicines and Healthcare products Regulatory Agency
2377	MHW	Mean High Water (nautical charts)
2378	MHWN	Mean High Water Neaps (nautical charts)
2379	MHWS	Mean High Water Springs (nautical charts)
2380	MHz	Megahertz
2381	Mi	Mebi
2382	MIA	Missing In Action
2383	MICLIC	Mine Clearing Line Charge
2384	MICOM	Missile Command
2385	MID	Midway Islands (ISO 3166 trigram; obsolete 1986)
2386	MIDAS	Man-machine Integration Design and Analysis System
2387	MIDI	Musical Instrument Digital Interface
2388	MIDS	Multi-Function Information Distribution System
2389	MIFG	Shallow Fog (METAR Code)
2390	MIKE	Monitoring of Illegal Killing of Elephants
2391	MIL	Man-In-the-Loop
2392	MILC	Mirrorless interchangeable-lens camera
2393	MILF	Mother I'd Like to Fuck
2394	MIMOSA	MIcroMeasurements Of Satellite Acceleration
2395	MIMPT	Member of the Institute of Maxillofacial Prosthetists and Technologists
2396	MIRA	MILAN Infra-Red Acquisition (thermal sight)
2397	MIRV	Multiple Independent Reentry Vehicle
2398	MISREP	Mission Report
2399	MISSI	Multilevel Information System Security Initiative
2400	MITL	Man-In-The-Loop
2401	MITS	see entry
2402	mJ	Millijoule
2403	MJD	Modified Julian Day
2404	mK	Millikelvin
2405	MKG	Michael Kidd-Gilchrist (American basketball player)
2406	MKSA	Metre-Kilogram-Second-Ampere (system of units)
2407	mL	Millilitre
2408	MLB	Major League Baseball
2409	MLC	Member of the Legislative Council (in India)
2410	MLE	Maximum likelihood estimation
2411	MLHW	Mean Lower High Water (nautical charts)
2412	MLI	Mali (ISO 3166 trigram)
2413	MLL	Major League Lacrosse
2414	MLLW	Mean Lower Low Water (nautical charts)
2415	MLP	My Little Pony
2416	MLRS	Multiple-Launch Rocket System
2417	MLT	Malta (ISO 3166 trigram)
2418	MLW	Mean Low Water (nautical charts)
2419	MLWN	Mean Low Water Neaps (nautical charts)
2420	MLWS	Mean Low Water Springs (nautical charts)
2421	Mm	Megametre
2422	mm	Millimetre
2423	MMEV	Multi-Mission Effects Vehicle
2424	MMI	Magical MonkeyZ Inc.
2425	MMI	Man-Machine Interface
2426	MMI	McLean Meditation Institute
2427	MMIC	McLean Meditation Institute Certified
2428	MMO	Massively Multiplayer Online (computer game)
2429	MMOR	Master of Management in Operations Research
2430	MMORPG	Massively multiplayer online role-playing game
2431	MMPR	Mighty Morphin Power Rangers
2432	MMS	Multimission Modular Spacecraft
2433	Mn	Manganese
2434	mN	Millinewton
2435	MNB	Multinational Brigade
2436	MNE	Montenegro (ISO 3166 trigram)
2437	MNMF	Multi-National Maritime Force
2438	MNP	Northern Mariana Islands (ISO 3166 trigram)
2439	MNS	Mission Needs Statement
2440	Mo	Molybdenum
2441	MOA	Museum of Art (Brigham Young University)
2442	MOCAS	Mechanization Of Contract Administration Services
2443	MoD	Ministry of Defence (United Kingdom) and various other countries
2444	modem	Modulator-Demodulator
2445	Moe	Marvel of entertainment
2446	MOE	Measure Of Effectiveness
2447	MOF	Ministry of Finance (Japan)
2448	MOFA	Ministry of Foreign Affairs (Japan)
2449	MOID	Minimum Orbital Intersection Distance
2450	MOJWA	Movement for Oneness and Jihad in West Africa
2451	MOLO	Mobile Other Licensed Operator (UK)
2452	MOM	Master's Degree in Oriental medicine
2453	MOM	Message Oriented Middleware
2454	MoM	Multiple of the median
2455	MoMA	Museum of Modern Art (NYC)
2456	MOND	Modified Newtonian Dynamics
2457	MOO	Measure Of Outcome
2458	MOPP	Mission-Oriented Protective Posture
2459	MORP	Meteorite Observation and Recovery Project
2460	MOSFET	Metal-Oxide-Semiconductor Field-Effect Transistor
2461	MOT	Ministry of Transport (UK)
2462	MOTA	Member of the Orthodontic Technicians Association
2463	MOTESS	Moving Object and Transient Event Search System
2464	MOU	Memorandum Of Understanding
2465	MOW	Maintenance of way (also MW)
2466	MOZ	Mozambique (ISO 3166 trigram)
2467	MPa	Megapascal
2468	mPa	Millipascal
2469	MPAA	Motion Picture Association of America
2470	MPEC	Minor Planet Electronic Circular
2471	MPEG	Motion Pictures (Coding) Experts Group
2472	MPEV	Multi-Purpose Engineering Vehicle
2473	MPF	Maritime Prepositioning Force
2474	MPFC	Medial PreFrontal Cortex
2475	MPG	Miles Per Gallon
2476	MPMC	Medial PreMotor Cortex
2477	MPSI	Member of the Pharmaceutical Society of Ireland
2478	MPSoC	MultiProcessor System-on-Chip
2479	MPSRON	Maritime Propositioning Ship Squadron
2480	MR	Mauritania (ISO 3166 digram)
2481	MRAV	Multi-Role Armoured Vehicle
2482	MRBM	Medium Range Ballistic Missile
2483	MRC	Maintenance Requirements Card
2484	MRD	Motorized Rifle Division
2485	MRGW	Medium-Range Guided Weapon
2486	MRI	Magnetic Resonance Imaging
2487	MRL	Multiple Rocket Launcher
2488	MRPharmS	Member of the Royal Pharmaceutical Society (Great Britain)
2489	MRS	Magnetic Resonance Spectroscopy
2490	MRSA	Methicillin-resistant Staphylococcus aureus
2491	MRTFB	U.S. Major Range and Test Facility Base
2492	Ms	Megasecond
2493	mS	Millisiemens
2494	MSD	Minimum Safe Distance
2495	MSDB	Multi Source Data Base
2496	MSE	Multiple Subscriber Element
2497	MSG	Message
2498	MSLP	Mean Sea Level Pressure
2499	MSNBC	Microsoft National Broadcasting Company Cable news channel (see also msnbc.com)
2500	MSO	Multiple System Operator
2501	MSPB	Merit Systems Protection Board
2502	MSSA	Methicillin-susceptible Staphylococcus aureus
2503	Mt	Meitnerium
2504	mT	Millitesla
2505	MTBF	Mean Time Between Failures
2506	MtF	Male-to-female transsexual
2507	MTG	Magic: The Gathering
2508	MTQ	Martinique (ISO 3166 trigram)
2509	MTT	Methylthiazol tetrazolium (assay)
2510	MTTF	Mean Time To Failure
2511	MTTR	Mean Time To Recover
2512	MTWS	MAGTF Tactical Warfare System
2513	MUS	Mauritius (ISO 3166 trigram)
2514	mV	Millivolt
2515	MVC	Missouri Valley Conference
2516	MVFC	Missouri Valley Football Conference
2517	MVNO	Mobile virtual network operator
2518	mW	Milliwatt
2519	MWESH	Machismo Wizards Extended SHelter (operating system)
2520	MWI	Malawi (ISO 3166 trigram)
2521	MWOA	Mount Wilson Observatory Association
2522	MWTB	Mounted Warfare Test Bed
2523	MY	Malaysia (ISO 3166 digram)
2524	MYOB	Mind Your Own Business
2525	MYS	Malaysia (ISO 3166 trigram)
2526	MYT	Mayotte (ISO 3166 trigram)
2527	n	Nano
2528	N/A	Not Available, Not Applicable, or: No Answer
2529	N3F	National Fantasy Fan Federation
2530	nA	Nanoampere
2531	Na	Sodium (Latin Natrium)
2532	NAA	N-Acetylaspartate
2533	NAAD	North American Air Defense
2534	NAAQS	National Ambient Air Quality Standards
2535	NAAWS	NATO Anti-Air Warfare System
2536	NAC	National Agency Check,U.S. Naval Avionics Center,U.S. Navy Advanced Concepts,North Atlantic Council,Northern Area Command
2537	NACC	North Atlantic Cooperation Council
2538	NACISA	NATO Communications and Information Systems Agency
2539	NACMA	NATO Air Command and Control System Management Agency
2540	NACRA	North America Caribbean Rugby Association (more specifically rugby union)
2541	NAEC	U.S. Naval Air Engineering Center
2542	NAFERA	Native American Free Exercise of Religion Act
2543	NAFLD	NonAlcoholic Fatty Liver Disease
2544	NAFO	Northwest Atlantic Fisheries Organization
2545	NAFTA	North American Free Trade Agreement
2546	NAGPRA	Native American Graves Protection and Repatriation Act
2547	NAICS	North American Industry Classification System
2548	NAIL	Neurotics Anonymous
2549	NAILS	National Airspace Integrated Logistics System
2550	NAIRU	Non Accelerating Inflation Rate of Unemployment
2551	NAK	Negative Acknowledge
2552	NAM	Namibia (ISO 3166 trigram)
2553	NAMBLA	North American Man-Boy Love Association
2554	NAMRL	Naval Aerospace Medical Research Laboratory
2555	NaN	Not A Number (computing)
2556	NAO	UK National Audit Office
2557	NAPS	Navy Acquisition Procedures Supplement
2558	NARA	(U.S.) National Archives and Records Administration
2559	NARAL	National Abortion Rights Action League
2560	NARDAC	Naval Regional Data Automation Center
2561	NARDIC	U.S. Navy Acquisition Research and Development Information Center
2562	NARPV	National Association for Remotely Piloted Vehicles
2563	NASCAR	National Association for Stock Car Auto Racing
2564	NASDAQ	National Association of Securities Dealers Automated Quotations
2565	NASED	National Association of State Election Directors [1][2]
2566	NASH	Non-Alcoholic Steatohepatitis
2567	NASP	National Aerospace Plane
2568	NASS	National Association of Secretaries of State [3]
2569	NatGeo	National Geographic
2570	NaUKMA	National University of Kyiv-Mohyla Academy
2571	NAV	Navigation[al]
2572	NAVCAMS	Naval Communications Area Master Station
2573	NAVCC	National Audio-Visual Conservation Center
2574	NAVCENT	Naval Forces U.S. Central Command
2575	NAVDAC	Naval Data Automation Command
2576	NAVEUR	Naval Forces U.S. European Command
2577	NAVFOR	Naval Force
2578	NAVMACS	Naval Modular Automatic Communication Subsystem
2579	NAVNET	Navy Network
2580	NAVS	Non-Cooperative Airborne Vector Scoring
2581	NAVSAT	Navigation Satellite
2582	NAVSPACECOM	U.S. Navy Space Command
2583	NAVSPASUR	U.S. Naval Space Surveillance System
2584	NAVSTAR	Navigation Satellite Timing And Ranging
2585	NAVTACNET	Navy Tactical Network
2586	NAWC	U.S. Naval Air Warfare Center
2587	Nb	Niobium
2588	NBA	National Basketball Association
2589	NBL	National Basketball League (Australia)
2590	NBT	Nitroblue tetrazolium (assay)
2591	nC	Nanocoulomb
2592	NCA	National Command Authority
2593	NCAR	U.S. National Center for Atmospheric Research
2594	NCB	National Codification Bureau
2595	NCCAM	U.S. National Center for Complementary and Alternative Medicine
2596	NCCUSL	National Conference of Commissioners on Uniform State Laws (U.S.)
2597	NCDDR	U.S. National Center for the Dissemination of Disability Research
2598	NCI	U.S. National Cancer Institute
2599	NCL	New Caledonia (ISO 3166 trigram)
2600	NCLR	National Council of La Raza
2601	NCMO	No Commitment Make Out
2602	NCO	Non-Commissioned Officer
2603	NCP	Net Contracted Purchases
2604	NCR	National Cash Register Co.
2605	NCTR	Non-Co-operative Target Recognition
2606	NCW	Network Centric Warfare
2607	Nd	Neodymium
2608	NDAA	U.S. National Defense Authorization Act
2609	NDBP	Non-Departmental Public Body (Scotland)
2610	NDP	New Democratic Party (Canada)
2611	NDS	Nintendo DS
2612	Ne	Neon
2613	NECTEC	National Electronics and Computer Technology Center (Thailand)
2614	NEMS	National Energy Modeling System (USDOE-EIA)
2615	NEPA	National Environmental Policy Act
2616	NER	Niger (ISO 3166 trigram)
2617	NERICA	New Rice for Africa
2618	NESP	NSA/CSS Enterprise Standards Program
2619	NET	National Educational Television
2620	NETCU	(UK) National Extremism Tactical Co-ordination Unit
2621	NETL	(US) National Energy Technology Laboratory
2622	NETWARS	Network Warfare Simulation
2623	NEX	Navy EXchange
2624	nF	Nanofarad
2625	NF	Norfolk Island (ISO 3166 digram)
2626	NFER	National Foundation for Educational Research
2627	NFG	No Fucking Good
2628	NFHS	National Federation of State High School Associations
2629	NFI	Not F****** Interested
2630	NFK	Norfolk Island (ISO 3166 trigram)
2631	Nfld	Newfoundland
2632	NFPA	National Fluid Power Association (United States)
2633	NFT	No Further Text
2634	NGA	U.S. National Geospatial-Intelligence Agency, Nigeria (ISO 3166 trigram)
2635	NGATS	New Generation Army Targetry System
2636	NGH	Northern General Hospital
2637	NGO	non-governmental organization
2638	NGS	Naval Gunfire Support
2639	nH	Nanohenry
2640	NHANES	National Health and Nutrition Examination Survey
2641	NHB	New Hebrides (ISO 3166 trigram; obsolete 1980)
2642	NHB	No Holds Barred radio (Link)
2643	NHL	National Hockey League
2644	NHRA	National Hot Rod Association
2645	NHS	National Health Service (UK)
2646	Ni	Nickel
2647	NIAAA	U.S. National Institute on Alcohol Abuse and Alcoholism
2648	NIAG	NATO Industrial Advisory Group
2649	NIAID	National Institute of Allergies and Infectious Disease
2650	NIAMD	National Institute of Arthritis and Musculoskeletal Diseases
2651	NIB	New In Box (Internet auction/trading listings)
2652	NIBP	Non-invasive blood pressure monitor
2653	NicA	Nicotine Anonymous
2654	NICAP	National Investigations Committee on Aerial Phenomena
2655	NICE	UK. National Institute for Health and Clinical Excellence
2656	NICHD	National Institute of Child Health and Human Development [4]
2657	NICP	National Inventory Control Point
2658	NIDDK	National Institute of Diabetes and Digestive and Kidney Diseases
2659	NIDRR	National Institute on Disability Research and Rehabilitation
2660	NIEHS	National Institute of Environmental Health Sciences
2661	NIIN	National Item Identification Number
2662	NIMA	National Imagery and Mapping Agency (became NGA)
2663	NIMBY	Not In My Back Yard (See NOME)
2664	NIMG	Not In My Generation
2665	NIN	Nine Inch Nails (band)
2666	NIPR	National Institute of Polar Research (Japan)
2667	NIR	Northern Ireland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
2668	NISAC	U.S. National Infrastructure Simulation and Analysis Center
2669	NISCAP	NSA Information System Certification and Accreditation Program
2670	NISER	National Institute of Science Education and Research
2671	NIST	National Institute of Standards and Technology
2672	NITFS	National Imagery Transmission Format Standard
2673	NIU	Niue (ISO 3166 trigram)
2674	nJ	Nanojoule
2675	NJ	New Jersey (postal symbol)
2676	NJHS	National Junior Honor Society
2677	NJPW	New Japan Pro Wrestling
2678	nK	Nanokelvin
2679	NKA	No Known Allergies
2680	nL	Nanolitre
2681	NLB	Non-Linear Battlefield
2682	NLD	Netherlands (ISO 3166 trigram)
2683	NLF	National Liberation Front (disambiguation)
2684	NLL	National Lacrosse League
2685	NLP	Natural Language Processing,Neuro-Linguistic Programming (pseudoscience)
2686	NLRB	National Labor Relations Board
2687	NLW	Non-Lethal Weapon
2688	nm	Nanometre
2689	NM	New Mexico (postal symbol)
2690	NMCI	Navy Marine Corps Intranet
2691	NMCS	Not Mission Capable Supply (SM&R code)
2692	NMD	U.S. National Missile Defense
2693	NMHNFG	Not Made Here,No Fucking Good
2694	NMN	No middle name
2695	NMR	Nuclear Magnetic Resonance
2696	NMSG	NATO Modelling and Simulation Group
2697	nN	Nanonewton
2698	NNE	North North-East
2699	NNSA	U.S. National Nuclear Security Administration
2700	NNW	North North-West
2701	NO	Nitric Oxide,Normally Open,Norway (ISO 3166 and FIPS 10-4 country code digram)
2702	No	Nobelium
2703	NOAA	U.S. National Oceanic and Atmospheric Administration
2704	NOAF	Norwegian Air Force
2705	NOAO	National Optical Astronomy Observatory
2706	NOC	UK. National Oceanography Centre
2707	NODEF	NATO Oceanographic Data Exchange Format
2708	NOGI	New Orleans Grande Isle (award for diving)
2709	NOLA	New Orleans,Louisiana (LA is the official postal code for Louisiana)
2710	NOLF	Navy OutLying Field
2711	NoMBO	Non-mine,Mine-like Bottom Object
2712	NOME	Not on Mars Either
2713	NOME	Not on Mars Either (see NIMBY)
2714	NOPA	National Office Products Alliance,National Office Products Association
2715	NOR	Norway (ISO 3166 trigram)
2716	NORELPREF	No religious preference
2717	NORTHAG	Northern Army Group
2718	NOS	Network Operating System,New Old Stock (Internet auction/trading listings),Nitric Oxide Synthase (enzyme)
2719	NOSA	NATO OSI Security Architecture
2720	NOTAFLOF	No One Turned Away For Lack Of Funds
2721	NOW	National Organization for Women
2722	NP	National Permit,A permit in India for trucks so they can go anywhere in the nation
2723	Np	Neap tide (nautical charts),Neptunium
2724	NP	Nepal (ISO 3166 and FIPS 10-4 country code digram)
2725	NPB	Nippon Professional Baseball
2726	NPC	National Postgraduate Committee,National Provincial Championship (New Zealand rugby competition,now defunct),Navigation Planning Chart
2727	NPCS	Non-Passenger Coaching stock (in Railways)
2728	NPD	Nationaldemokratische Partei Deutschlands (German)
2729	NPDI	New Product Development and Introduction
2730	NPG	Needline/Network Participation Group
2731	NPH	Normal Pressure Hydrocephalus
2732	NPL	National Priorities List,Nepal (ISO 3166 trigram)
2733	NPO	nothing by mouth
2734	NPOV	Neutral Point Of View
2735	NQ	Dronning Maud Land (ISO 3166 digram; obsolete 1983)
2736	NQOCD	Not Quite Our Class,Dear (or Darling). (Upper-class English slang)
2737	NR	Nauru (ISO 3166 and FIPS 10-4 country code digram)
2738	NRA	National Rifle Association
2739	NRAO	National Radio Astronomy Observatory
2740	NRC	(U.S.) National Research Council,Nuclear Regulatory Commission (U.S.)
2741	NRDC	(U.S.) Natural Resources Defense Council
2742	NREL	(U.S.) National Renewable Energy Laboratory
2743	NRK	Norsk Rikskringkasting (Norwegian Broadcasting Corporation)
2744	NRMP	National Resident Matching Program (U.S. medicine)
2745	NRO	(U.S.) National Reconnaissance Office
2746	NRT	Near Real Time
2747	NRTA	National Rat Terrier Association,National Retail Tenants Association,National Retired Teachers Association,Northwest Regional Transmission Association
2748	NRU	Nauru (ISO 3166 trigram)
2749	ns	Nanosecond
2750	nS	Nanosiemens
2751	NS	Norfolk Southern Railway (AAR reporting mark),Nova Scotia (postal symbol),Suriname (FIPS 10-4 country code)
2752	NSA	U.S. National Security Agency,Naval Support Activity,No Strings Attached
2753	NSABB	National Science Advisory Board for Biosecurity
2754	NSAID	Non-Steroidal Anti-Inflammatory Drug
2755	NSB	Norges Statsbaner (Norwegian State Railways)
2756	NSC	National Security Council
2757	NSDAP	Nationalsozialistische Deutsche Arbeiterpartei (German: 'German National Socialist Workers Party',the formal name of the Nazi Party)
2758	NSDL	National Science Digital Library (US)
2759	NSG	National System for Geospatial-Intelligence
2760	NSN	National Stock Number
2761	NSNA	National Student Nurses' Association
2762	NSO	National Standardization Office (ABCA)
2763	NSS	(U.S.) Naval Simulation System
2764	NST	(UK) Nimrod Software Team
2765	NSTAC	National Security Telecommunications Advisory Committee
2766	NSV	Nikitin-Sokolov-Volkov heavy machine gun (Russian НСВ Никитина-Соколова-Волкова) ru:ПулеметНСВ-12,7 'Утес'
2767	NSW	New South Wales (postal symbol)
2768	nT	Nanotesla
2769	NT	National Trust (UK),Saudi-Iraqi neutral zone (ISO 3166 digram; obsolete 1993),New Technology (Windows NT),Northern Territory (Australia) (postal symbol),Northwest Territories (Canada) (postal symbol)
2770	NTC	National Training Center,Negative Temperature Coefficient (thermistor)
2771	NTDS	Naval Tactical Data System
2772	NTP	Network Time Protocol
2773	NTR	Network Time Reference
2774	NTRA	National Thoroughbred Racing Association
2775	NTSB	National Transportation Safety Board
2776	NTSC	National Television Standards Committee (colloquially,Never Twice the Same Color)
2777	NTV	Non-Tactical Vehicle
2778	NTY	(Internet Abbreviations:) Not Tested Yet; (Alternatively) No Thank You
2779	NTZ	Iraq-Saudi Arabia Neutral Zone (ISO 3166 trigram; obsolete 1993)
2780	NU	Nicaragua (FIPS 10-4 country code),Niue (ISO 3166 digram),Nunavut (postal symbol)
2781	NUL	Null character (ASCII code of control character),National Urban League
2782	NUTS	Nuclear Utilization Target Selection
2783	NUWC	U.S. Naval Undersea Warfare Center
2784	nV	Nanovolt
2785	NVEOL	Night Vision and Electro-Optics Laboratory
2786	NVESD	CERDEC Night Vision and Electronic Sensors Directorate,Fort Belvoir,Virginia
2787	NVG	Night Vision Goggles
2788	NVL	Night Vision Laboratory
2789	nW	Nanowatt
2790	NW	North-West
2791	NW	Nuclear Weapon
2792	NWA	National Wrestling Alliance
2793	NWF	National Wildlife Federation
2794	NWFZ	Nuclear-Weapon-Free Zone
2795	NWHN	U.S. National Women's Health Network
2796	nWo	New World Order (see article for explanation of idiosyncratic capitalization)
2797	NWOAHM	New Wave of American Heavy Metal
2798	NWOBHM	New Wave of British Heavy Metal (sometimes pronounced /n.ˈwɒbm/ as if it were an acronym)
2799	NWRA	National Wildlife Rehabilitators Association
2800	NWSL	National Women's Soccer League (U.S.)
2801	NWT	North-West Territories
2802	NXA	21st arcade game in the Pump It Up series
2803	NXD	Native XML
2804	NXE	New Xbox Experience
2805	NXG	New Cross Gate station
2806	NXL	National XBall League
2807	NXN	Nike Cross Nationals
2808	NY	New York (postal symbol)
2809	NYC	New York City
2810	NYT	New York Times
2811	NYHA	New York Heart Association
2812	NYO	National Youth Orchestra of Great Britain
2813	NYSE	New York Stock Exchange
2814	NZ	New Zealand (ISO 3166 and FIPS 10-4 country code digram)
2815	NZC	New Zealand Cricket
2816	NZL	New Zealand (ISO 3166 trigram)
2817	NzL	Noze looan (online/event listings)
2818	NZOSS	New Zealand Open Source Society
2819	NZRU	New Zealand Rugby Union
2820	OAC	On Approved Credit
2821	OAP	Old Age Pensioner (UK)
2822	OARSI	Osteoarthritis Research Society International
2823	OAS	Organization of American States
2824	OASIS	Ontario Agencies Supporting Individuals with Special Needs
2825	OASIS	Ontario Association of Sewage Industry Services
2826	OASP	Operational Analysis Support Paper/Plan
2827	OAU	Organization for African Unity
2828	OBE	Officer of the Order of the British Empire
2829	OBX	Outer Banks (North Carolina)
2830	OC	Officer Commanding
2831	OCD	Obsessive-Compulsive Disorder
2832	OCFS	Oracle Cluster File System
2833	OCFS2	Oracle Cluster File System Release 2
2834	OCMCC	[2] Orchard County MCC
2835	OCN	Oncology Certified Nurse
2836	OCO	Oort Cloud Object
2837	OCR	Optical Character Recognition
2838	OCS	see entry
2839	ODAS	OCA-DLR Asteroid Survey
2840	ODBC	Open DataBase Connectivity
2841	OEA	(U.S.) Office of Economic Adjustment
2842	OECD	Organisation for Economic Co-operation and Development (international)
2843	OED	Oxford English Dictionary
2844	OEG	Operation Exposure Guidance
2845	OEIS	On-Line Encyclopedia of Integer Sequences
2846	OEM	Original Equipment Manufacturer
2847	OFA	Occipital Face Area
2848	OFDA	U.S Agency for International Development's Office of Foreign Disaster Assistance
2849	OGC	Open Geospatial Consortium
2850	OGD	Other Government Department
2851	OGO	Other Government Organization
2852	OH	Ohio (postal symbol)
2853	OHC	OverHead-Cam engine
2854	OHHLA	Original Hip-Hop Lyrics Archive
2855	OHIP	Ontario Health Insurance Plan
2856	OHMS	On Her (or His) Majesty's Service (also written: O.H.M.S.)
2857	OHP	Observatoire de Haute-Provence
2858	OHSS	Ovarian Hyperstimulation Syndrome
2859	OIC	Officer In Charge
2860	OIF	Operation Iraqi Freedom
2861	OIOC	Oriental & India Office Collections (in the British Library)
2862	OJT	On-the-Job Training
2863	OKC	Oklahoma City
2864	OLED	Organic Light-Emitting Diode
2865	OLS	Operational Linescan System
2866	OMD	Orchestral Manoeuvres in the Dark (1980s pop group)
2867	OME	Osaka Mercantile Exchange
2868	OMFG	Oh My Fucking God
2869	OMG	Oh My God or Or My Gosh
2870	OMGW	Oh My Gosh it's Windy
2871	OMN	Oman (ISO 3166 trigram)
2872	OMNCS	U.S. Office of the Manager for the National Communications System
2873	OMP	Order of Mapungubwe in Platinum
2874	OMS	Order of Mapungubwe in Silver
2875	OMT	Object Model Template
2876	ON	Ontario (postal symbol)
2877	ONC	Orthopaedic Nurse Certified
2878	ONG	Orthodontic National Group
2879	ONI	(U.S.) Office of Naval Intelligence
2880	ONS	Operational Needs Statement
2881	OOAD	Object Oriented Analysis and Design
2882	OOBE	Out-of-body experience
2883	OOCL	Orient Overseas Container Line
2884	OODA	Observation,Orientation,Decision,Action loop (a.k.a. Boyd's Loop)
2885	OOF	Out of Facility
2886	OOMF	One Of My Followers
2887	OOO	Out Of the Office
2888	OOTW	Operations Other Than War
2889	OP	Observation Point/Post,Ocean Pacific (surfwear and swimwear brand),Original Poster (internet),Order Point,in inventory management; the inventory state at which more items should be ordered. Often expressed as a part of OP/OQ (when quantity OP is reached,order OQ new items),Overpowered,often used to refer to fictional characters (e.g. Superman) or game mechanics (e.g. the Black Lotus in Magic: the Gathering) that are considered disproportionately strong
2890	OPAC	Online Public Access Catalogue
2891	OPCON	Operational control
2892	OPCW	Organisation for the Prohibition of Chemical Weapons
2893	OPEC	Organization of the Petroleum Exporting Countries
2894	OPFOR	Opposing force
2895	OPINTEL	Operational Intelligence
2896	OPLAN	Operation plan (also OpPlan)
2897	OPORD	Operation order
2898	OPSEC	Operations security,Open Platform for Security
2899	OPSI	Overwhelming post splenectomy infection,UK Office of Public Sector Information
2900	OPTAR	Operational target
2901	OPV	Offshore Patrol Vessel
2902	OQ	Order Quantity,in inventory management; the quantity of new items to be ordered. Often expressed as a part of OP/OQ (when quantity OP is reached,order OQ new items)
2903	OR	Operating Room (surgery),Operational/Operations Research,Oregon (postal symbol),overreciprocation,when the leader of an inner circle friendship contacts a friend more than is wanted or reasonable
2904	ORAU	Oak Ridge Associated Universities
2905	ORB	Object Request Broker
2906	ORBAT	Order of Battle
2907	ORD	Office of Research and Development,Operational Requirements Document
2908	ORF	Operational iness Float
2909	ORISE	Oak Ridge Institute for Science and Education
2910	ORNL	Oak Ridge National Laboratory
2911	ORR	Oak Ridge Reservation (U.S. DOE),Office of Rail Regulation (UK government),Office of Refugee Resettlement,(CIA) Office of Research and Reports,Operational iness Rate,Operational iness Review
2912	ORSA	Oxacillin-resistant Staphylococcus aureus,Operations Research Society of America
2913	OS	Operating System
2914	Os	Osmium
2915	OSA	Order of St. Augustine
2916	OSCE	Organisation for Security and Cooperation in Europe
2917	OSD	U.S. Office of the Secretary of Defense,On-screen Display
2918	OSDL	Open Source Development Labs
2919	OSE	Own Separate Entrance
2920	OSERS	U.S. Department of Education Office of Special Education and Rehabilitative Services
2921	OSETI	Optical SETI also Optical SETI
2922	OSHA	Occupational Safety and Health Administration
2923	OSI	Office of Strategic Influence,Ontario Swine Improvement,Open Source Initiative,Open Systems Interconnection
2924	OSIA	(U.S.) On-Site Inspection Agency
2925	OSIRIS	Optical,Spectroscopic,and Infrared Remote Imaging System (astronomical system on the Rosetta spacecraft),Optical System for Imaging and low Resolution Integrated Spectroscopy (astronomical system on the land-based Gran Telescopio Canarias)
2926	OSL	Open Source License, Optically Stimulated Luminescence, Orbiting Solar Laboratory
2927	OSM	One Saturday Morning
2928	OSOTPBOIAS	One Sec,On The Phone,Be Off In A Sec
2929	OSPA	Operations Security Professional's Association site of OSPA
2930	OSPA	Oregon School Psychologists Association [3]
2931	OSRH	Oružane Snage Republike Hrvatske (en: Armed forces of the Republic of Croatia)
2932	OSS	Office of Strategic Services (1942-1945, forerunner of CIA)
2933	OSU	Ohio State University,Oklahoma State University
2934	OTA	Office of Technology Assessment, Orthodontic Technicians Association
2935	OTAC	Orthodontic Technicians Association Conference,Orthodontic Technicians Association Council
2936	OTC	Over-The-Counter (drugs)
2937	OTD	Off the derech (referring to an Orthodox Jew who has stopped practicing the tenets of his or her faith)
2938	OTEA	(U.S. Army) Operational Test Evaluation Agency
2939	OTI	Office of Transition Initiatives (United States Agency for International Development)
2940	OTOH	On The Other Hand
2941	OTS	Off the scale,sexually untouchable except for a lot of money
2942	OTSBH	Over The Shoulder Boulder Holder
2943	OTW	On The Way
2944	OTYBL	Over To You Blue Leader
2945	OTYRL	Over To You Red Leader
2946	OU	University of Oklahoma
2947	OW	Old Wykehamist
2948	OWN	Oprah Winfrey Network
2949	OX	IATA code for Orient Thai Airlines
2950	OXC	Optical cross-connect
2951	OXM	Official Xbox Magazine
2952	OXT	Oxytocin
2953	OZ	(?) Australia
2954	p	pico
2955	P2P	Peer-to-peer (networking)
2956	pA	picoampere
2957	PAA	Position Area for Artillery
2958	PABX	Private Automated Branch eXchange (company phone system)
2959	PACOM	(U.S.) Pacific Command
2960	PADI	Professional Association of Diving Instructors
2961	PAEK	PolyArylEtherKetone
2962	PAFC	Plymouth Argyle Football Club
2963	PAH	Polycyclic aromatic hydrocarbon
2964	PAHO	Pan American Health Organization
2965	PAK	Pakistan (ISO 3166 trigram)
2966	PAM	Precision Attack Missile
2967	PANS	Pretty Advanced/Awesome Network Services (cf. POTS)
2968	PARC	Palo Alto Research Center
2969	PAROS	Prevention of an Arms Race in Outer Space (treaty)
2970	PARP	(NATO Partnership for Peace) Planning And Review Process
2971	PARWIG	Power Augmented Ram Wing In Ground (aeroplane wing shape)
2972	PAS	See entry
2973	PASR	Personnel Accounting and Strength Reporting
2974	PATH	Port Authority Trans-Hudson
2975	PAYD	Pay As You Drive
2976	PAYE	Pay As You Earn
2977	Pb	Lead (Latin Plumbum)
2978	PB	PolyButylene
2979	PBB	PolyBrominated Biphenyl
2980	PBCK	Problem Between Chair and Keyboard (computer help desk in-joke)
2981	PBD	PolyButaDiene
2982	PBDE	PolyBrominated Diphenyl Ether
2983	PBI	PolyBenzImidazole
2984	PBN	PolyButylene Naphthalate
2985	PBOH	Please Become Old History
2986	PBT	PolyButylene Terephthalate
2987	PBX	Private Branch eXchange (company phone system)
2988	pC	picocoulomb
2989	PCAS	Planet-Crossing Asteroid Survey
2990	PCB	see entry
2991	PCCB	Porsche Ceramic Composite Brake
2992	PCCIP	President's Commission on Critical Infrastructure Protection
2993	PCE	PerChlorEthylene
2994	PCIe	Peripheral Component Interconnect Express (computer bus)
2995	PCL	Passive Coherent Location
2996	PCMCIA	Personal Computer Memory Card International Association (People Can't Memorise Computer-Industry Acronyms)
2997	PCN	Pitcairn Islands (ISO 3166 trigram)
2998	PCPI	Physician Consortium for Performance Improvement (AMA)
2999	PCR	Polymerase chain reaction
3000	PCSSD	Pulaski County Special School District
3001	PCZ	Panama Canal Zone (ISO 3166 trigram; obsolete 1980)
3002	Pd	Palladium
3003	PD	Product Director—Example: CERDEC Product Director C4ISR and Network Modernization
3004	PDL	Pure Dumb Luck (Texan punk band)
3005	PDN	Pull-Down Network
3006	PDRY	People's Democratic Republic of Yemen (obsolete since 1990)
3007	PDT	Pacific Daylight [Saving] Time (UTC-7 hours)
3008	PE	Professional Engineer
3009	PEBCAC	Problem Exists Between Chair and Computer (IT help desk in-joke)
3010	PEBKAC	Problem Exists Between Keyboard and Chair (ditto)
3011	PEEK	PolyEtherEtherKetone
3012	PEET	Partnerships for Enhancing Expertise in Taxonomy
3013	PEK	PolyEtherKetone
3014	PEPFAR	President's Emergency Plan For AIDS Relief
3015	PER	Peru (ISO 3166 trigram)
3016	perl	usually lower case Practical Extraction and Report Language
3017	PES	PolyEtherSulfone
3018	PEST	UK Public Engagement with Science and Technology
3019	PETE	PolyEthyleneTErephthalate
3020	PETP	PolyEthyleneTerePhthalate
3021	pF	picofarad
3022	PFD	Permanent Fund Dividend = personal flotation device
3023	PFE	Permanent Forest Estate
3024	PfP	Partnership for Peace
3025	Pg	petagram
3026	pg	picogram
3027	PGCE	Postgraduate Certificate in Education
3028	PGD	Pre-implantation Genetic Diagnosis
3029	PGENI	Pharmaco-Genetics for Every Nation Initiative
3030	PGH	Pre-implantation Genetic Haplotyping
3031	PGM	Precision-Guided Munition
3032	PGP	Pretty Good Privacy
3033	PHL	Philippines (ISO 3166 trigram)
3034	PHQ	Patient Health Questionnaire
3035	Pi	Pebi
3036	PIB	PolyIsoButylene
3037	PIC	Person In Charge
3038	PICNIC	Problem In Chair Not In Computer
3039	PICS	Private Investment Capital Subscription
3040	PIF	Partners in Flight
3041	PIG	Pipeline Inspection Gauge
3042	PIN	Personal Identification Number
3043	PINF	People In Need Foundation (Czech charitable organisation)
3044	PIPA	Program on International Policy Attitudes
3045	PIR	Priority Intelligence Requirement
3046	PIRA	Provisional Irish Republican Army
3047	PIREPS	Pilot Reports
3048	PITA	Pain In The Ass
3049	PJ	petajoule
3050	pJ	picojoule
3051	PJHQ	Permanent Joint Headquarters
3052	PKE	Partnership of Kindermusik Educators [1] &[2] & [2]
3053	PKI	Public Key Infrastructure (cryptography)
3054	PKU	Phenylketonuria
3055	pL	picolitre
3056	PLAID	Precision Location and Identification
3057	PLB	Personal Locator Beacon
3058	PLC	Public Limited Company (British)
3059	PLCC	Plastic Leaded Chip Carrier (electronics)
3060	PLD	Probable Line of Deployment
3061	PLEBS	People Lacking Everyday Basic Skills
3062	PLF	Parachute Landing Fall
3063	PLIF	Planar Laser-Induced Fluorescence
3064	PLL	Phase-Locked Loop (electronics)
3065	PLM	Polarized Light Microscope/Microscopy
3066	PLMBA	Phospholipid Bilayer Microarray
3067	Pln	Platoon
3068	PLO	Palestine Liberation Organization
3069	PLOKTA	Press Lots Of Keys To Abort
3070	PLP	Platonic Life Partner
3071	PLUTO	Pipe Line Under The Ocean
3072	PLW	Palau (ISO 3166 trigram)
3073	pm	picometre
3074	PMC	Primary Motor Cortex
3075	PMI	Positive Material Identification
3076	PMID	PubMed Identifier
3077	PMMA	PolyMethylMethAcrylate
3078	PMS	Premenstrual Syndrome
3079	PMSL	Piss Myself Laughing (Internet shorthand)
3080	PMT	Premenstrual Tension (UK) (see Premenstrual Syndrome)
3081	pN	piconewton
3082	PNAC	Project for the New American Century
3083	PNVS	Pilot Night Vision Sensor
3084	Po	Polonium
3085	PO	Post Office
3086	PO	Purchase Order
3087	POCD	Post-Operative Cognitive Dysfunction
3088	pod	Plain Old Documentation
3089	POFF	Plain Old Flat File
3090	POGO	Project On Government Oversight
3091	POI	Program Of Instruction
3092	POK	Plane Of Knowledge
3093	POLAD	Political Advice
3094	POMDP	Partially observable Markov decision process
3095	PooS	Poo Sniffer (Internet shorthand)
3096	POS- Point Of Sale terminal (retail industry transaction computers)	Piece Of S**t
3097	POSH	Port Outbound Starboard Home (alleged)
3098	POSSLQ	Person of the Opposite Sex Sharing Living Quarters
3099	POT	Plane Of Tranquility
3100	POTS	Plain Old Telephone Service (cf. PANS),Postural Orthostatic Tachycardia Syndrome
3101	POTUS	President of the United States
3102	POV	Point of view
3103	POW	Prisoner of war
3104	PPASC	(U.S.) Plans and Program Analysis Support Center
3105	PPCLI	Princess Patricia's Canadian Light Infantry (regiment)
3106	PPLI	Precise Participant Location & Identification
3107	PPM	Project Planning and Management
3108	PPO	PolyPhenylene Oxide
3109	PPQN	Pulses Per Quarter Note (ditto)
3110	PPQT	Pre-Production Qualification Test
3111	PPV	Pay-per-view
3112	Pr	Pastor, Priest
3113	PR	Public Relations
3114	Prb	Presbyter
3115	PRBO	Point Reyes Bird Observatory
3116	PRC	People's Republic of China
3117	PRD	CERDEC Product Realization Directorate
3118	PRFG	Partial Fog (METAR Code)
3119	PRI	Puerto Rico (ISO 3166 trigram)
3120	PRK	Democratic People's Republic of Korea (ISO 3166 trigram)
3121	PRM	Personnel iness Management
3122	PRY	Paraguay (ISO 3166 trigram)
3123	Ps	petasecond
3124	pS	picosiemens
3125	PSG	Pacific Seabird Group
3126	PSI	Portable Source Initiative
3127	PSI	Pounds per square inch
3128	PSS	Personnel System Support
3129	PST	Pacific Standard Time (UTC-8 hours)
3130	PSU	Pennsylvania State University
3131	PsyOp	Psychological Operations
3132	pT	picotesla
3133	Pt	Platinum
3134	PTA	Parent-Teacher Association
3135	PTAL	Public Transport Accessibility Level
3136	PTES	People's Trust for Endangered Species
3137	PTFE	PolyTetraFluoroEthylene
3138	PTI	Pardon the Interruption
3139	PTSD	Post-Traumatic Stress Disorder
3140	Pu	Plutonium
3141	Pub	Publication
3142	PUG	PET Users Group
3143	PUN	Pull-Up Network
3144	PUP	Pull-Up Point
3145	PUS	United States Miscellaneous Pacific Islands (ISO 3166 trigram; obsolete 1986)
3146	PV	petavolt
3147	pV	picovolt
3148	PvE	Player versus Environment
3149	PvP	Player versus Player
3150	PVR	Personal Video Recorder
3151	PvZ	Plants vs. Zombies
3152	PW	Palau (postal symbol; ISO 3166 digram)
3153	pW	picowatt
3154	PWA	Pirates With Attitude
3155	PWBA	Pension and Welfare Benefits Administration
3156	PWC	PieceWise Constant (describing a mathematical function)
3157	PwC	PricewaterhouseCoopers (international accounting firm)
3158	PWL	PieceWise Linear (describing a mathematical function)
3159	PWLC	PieceWise Linear and Concave/Convex (describing a mathematical function)
3160	PWR	Pressurized Water Reactor
3161	PX	Post eXchange
3162	PYF	French Polynesia (ISO 3166 trigram)
3163	PYMWYMI	Put Your Money Where Your Mouth Is
3164	Q1	First quarter of the year
3165	Q2	Second quarter of the year
3166	Q3	Third quarter of the year
3167	Q4	Fourth quarter of the year
3168	QA	Qatar (ISO 3166 digram)
3169	Qantas	Queensland And Northern Territory Aerial Services
3170	QAT	Qatar (ISO 3166 trigram)
3171	QB	Quarterback (football)
3172	QCD	Quantum ChromoDynamics
3173	QD	quaque die (Latin for 'daily')
3174	QDR	Quadrennial Defense Review
3175	QEH	Queen Elizabeth's Hospital
3176	QK	Air Canada Jazz (IATA airline designator)
3177	QNH	Regional mean sea level atmospheric pressure (aeronautical Q code)
3178	QPS	Quark Publishing System
3179	QS	quantum sufficit (Latin, 'as much as suffices')
3180	QSCAT	Quick Scatterometer satellite
3181	QSL	Québec Sign Language
3182	QSO	Quasi-Stellar Object
3183	Quango	(British Commonwealth) QUasi Autonomous Non-Governmental Organisation
3184	Quasar	Quasi-stellar radio source
3185	QUB	Queen's University Belfast
3186	QUIET	Q and U Imaging ExperimenT (Q and U are the Stokes parameters of the CMBR polarization)
3187	qv	quod vide (Latin, 'which see')
3188	QZ	Awair (IATA airline designator)
3189	R2I	Resistance to Interrogation
3190	RA	Radio Australia
3191	Ra	Radium
3192	RAAF	Royal Australian Air Force
3193	Rabobank	Raiffeisen-Boerenleenbank (from the two banks that merged to form the modern company)
3194	RACK	Risk Aware Consensual Kink (SM phrase)
3195	Racon	RAdar beaCON
3196	RADA	Royal Academy of Dramatic Art
3197	Radar	Radio Detection And Ranging
3198	RadB	Rad51/Dmc1 homologous protein
3199	RADb	Routing Assets Data Base
3200	RADC	Region Air Defence Commander
3201	RAE	UK Royal Aircraft Establishment (-1991)
3202	RAGBRAI	Register's Annual Great Bicycle Ride Across Iowa
3203	RAM	Royal Air Maroc
3204	Ramark	RAdar MARKer
3205	RAOC	Rear Area Operation Centre
3206	RARDE	UK Royal Armament Research and Development Establishment (1962-1991)
3207	RARE	Rapid Acquisition with Relaxation Enhancement (MRI technique)
3208	RATELO	Radiotelephone Operator
3209	Rb	Rubidium
3210	RB	Running Back (football)
3211	RBI	Runs Batted In
3212	RC	see entry
3213	RCAF	Royal Canadian Air Force
3214	RCC	Rescue Co-ordination Centre
3215	RCCO	Royal Canadian College of Organists
3216	RCHA	Royal Canadian Horse Artillery (regiment)
3217	RCMP	Royal Canadian Mounted Police
3218	RD	Radio Disney
3219	RDD	Radiological Dispersion Device
3220	RDM	Remotely Delivered/Deliverable Mine
3221	RDT	Remote Digital Terminal
3222	RDV	Remote Detection Vehicle
3223	Re	Rhenium
3224	RE	Royal Engineers
3225	REACT	Remote Electronically Activated Control Technology
3226	REAM	Retired Educators Association of Minnesota
3227	RECCE	Reconnaissance
3228	REEF	Reef Environmental Education Foundation
3229	REM	Rapid Eye Movement (sleep phase),Rosicrucian Egyptian Museum
3230	REME	Royal Electrical and Mechanical Engineers
3231	RERC	Rehabilitation Engineering Research Center
3232	RESNA	Rehabilitation Engineering and Assistive Technology Society of North America
3233	REU	Réunion (ISO 3166 trigram)
3234	Rf	Rutherfordium
3235	RFD	Request for Documentation
3236	RFE	Request for Evaluation
3237	RFEF	Real Federación Española de Fútbol (Spanish for Royal Spanish Football Federation)
3238	RFF	Right of First Refusal (legal term)
3239	RFID	Radio Frequency IDentification
3240	RFL	Rugby Football League
3241	RFP	Request for Proposal
3242	RFQ	Request for Quotation
3243	RFT	Request for Tender
3244	RFU	Rugby Football Union
3245	RG	Republican Guard
3246	Rg	Roentgenium
3247	RGB	Red Green Blue (colour model)
3248	RGBI	Red Green Blue Intensity (ditto)
3249	Rh	Rhodium
3250	RH	Southern Rhodesia (ISO 3166 digram; obsolete 1980)
3251	RHIC	Relativistic Heavy Ion Collider
3252	RHLI	Royal Hamilton Light Infantry (Canadian militia regiment)
3253	RHO	Southern Rhodesia (ISO 3166 trigram; obsolete 1980)
3254	RHU	Replacement Holding Unit
3255	RI	Rhode Island (postal symbol)
3256	RIAA	Recording Industry Association of America
3257	RIBA	Royal Institute of British Architects
3258	RIFA	Red imported fire ant
3259	RILA	Retail Industry Leaders Association
3260	RIMVS	Retinal Imaging Machine Vision System
3261	RINO	Republican In Name Only[1]
3262	RIP	Relief In Place,requiesca[n]t in pace (Latin for 'may he/she/they rest in peace')
3263	RISC	Reduced Instruction Set Computer
3264	RJD	Reduced Julian Day
3265	RKBA	Right to Keep and Bear Arms (Second Amendment to the United States Constitution)
3266	RKO	Radio-Keith-Orpheum Pictures
3267	RLP	Recognised [Operating/Operational] Land Picture
3268	RLS	Restless Leg Syndrome
3269	RLY	Rally Point
3270	RM	see separate disambiguation page
3271	RMC	Robert Menzies College
3272	RMDA	Records Management and Declassification Agency
3273	RMP	Recognised [Operating/Operational] Maritime Picture
3274	RN	Radio Netherlands
3275	Rn	Radon
3276	RNA	RiboNucleic Acid
3277	RNAD	Royal Naval Armaments Depot (UK)
3278	RNPS	Radio Network Planning System
3279	RNZ	Radio New Zealand
3280	RNZI	Radio New Zealand International
3281	ROA	Rate Of Ascent
3282	ROE	Rules Of Engagement
3283	ROFLOL	Rolling On the Floor Laughing Out Loud
3284	ROH	Ring of Honor
3285	ROK	Republic of Korea
3286	ROP	Render Output Pipeline
3287	ROPE	Research Opportunity and Performance Evidence
3288	ROS	Reactive Oxygen Species
3289	ROU	Romania (ISO 3166 trigram)
3290	ROV	Remotely Operated Vehicle
3291	ROZ	Restricted Operations Zone
3292	RPA	Regional Plan Association
3293	RPD	Recognition-Primed Decision-making
3294	RPF	Rwandan Patriotic Front
3295	RPL	Reverse Polish Lisp
3296	rpm	revolutions per minute
3297	RPN	reverse Polish notation
3298	rps	revolutions per second
3299	RPV	Remotely Piloted Vehicle
3300	RQ	Puerto Rico (FIPS 10-4 territory code)
3301	RRB	Railroad Retirement Board
3302	RRN	Recurrence Rate Number
3303	RRP	Recurrent Respiratory Papillomatosis
3304	RRS	Racing Rules of Sailing
3305	RRSP	Registered Retirement Savings Plan (Canada; roughly equivalent to the IRA in the U.S.)
3306	RS	Russia (FIPS 10-4 country code)
3307	RSI	Repetitive Strain Injury
3308	RSJ	Rolled Steel Joist (construction)
3309	RSN	Real Soon Now (coined by author Jerry Pournelle)
3310	RSPB	(UK) Royal Society for the Protection of Birds
3311	RSPCA	Royal Society for the Prevention of Cruelty to Animals
3312	RSR	Required Supply Rate
3313	RSRE	UK Royal Signals and Radar Establishment (1976-1991)
3314	RSRI	Red Sands Research Institute
3315	RTA	Road traffic accident (British)
3316	RTBF	Radio-Télévision belge de la Communauté française
3317	RTF	Rich Text Format
3318	RTFM	the Fucking/Fine Manual
3319	RTG	Radio-isotope Thermoelectric Generator also used for Rubber Tyred Gantry crane
3320	RTI	Run-Time Infrastructure (Simulation)
3321	RTL	see entry
3322	RTP	Real-time Transport Protocol
3323	RTS	see entry
3324	RTT	Round Trip Timing
3325	RU	Russia (ISO 3166 digram)
3326	Ru	Ruthenium
3327	RUC	Royal Ulster Constabulary
3328	RUS	Russia (ISO 3166 trigram)
3329	RUSI	Royal United Services Institute for Defence Studies
3330	RW	Rwanda (ISO 3166 and FIPS 10-4 country code digram)
3331	RWA	Rwanda (ISO 3166 trigram)
3332	RWH	Rain Water Harvesting
3333	RWR	Radar Warning Receiver
3334	RWS	Remote Weapon Station
3335	Rx	Medical prescription (possibly from Latin 'recipere','to take': see entry)
3336	RX	Receive
3337	SARS	Severe Acute Respiratory Syndrome
3338	SBNO	Standing but not operating (in reference to amusement parks)
3339	SCOTUS	Supreme Court of the United States
3340	SCROTUS	So-called Ruler of the United States
3341	SDHC	Secure Digital High Capacity
3342	SDXC	Secure Digital eXtended Capacity
3343	SG	Senegal (FIPS 10-4 country code), Singapore (ISO 3166 digram), Snow Grains (METAR Code), Study Group
3344	SGOTUS	Second Gentleman of the United States
3345	SHO	Showtime (see also sho.com)
3346	SIRI	Service Interface for Real Time Information
3347	Siri	Speech Interpretation and Recognition Interface (Apple iOS software)
3348	SLOTUS	Second Lady of the United States (the vice president's wife)
3349	SoCon	Southern Conference (U.S. college sports)
3350	SSC	Safe,Sane,Consensual (SM phrase),Secondary Somatosensory Cortex,Smaller-Scale Contingency,U.S. Army Soldiers System Center (Natick,Massachusetts),Superconducting Super Collider,SSCCATAGAPP — Singles,Seniors,Childless Couples,And Teens And Gays Against Parasitic Parents (fictional organization from The Simpsons)
3351	SSD	South Sudan (ISO 3166 trigram)
3352	SSDC	U.S. Space and Strategic Defense Command
3353	STB	Surface Transportation Board[2]
3354	SWAC	Southwestern Athletic Conference
3355	SWAN	System for Wearable Audio Navigation
3356	SWAT	Special Weapons And Tactics
3357	SWF	Single White Female
3358	Ta	Tantalum
3359	TAACOM	U.S. Theater Army Area Command
3360	TAADCOORD	Theatre Army Air Defence Co-ordinator
3361	TAAR	Trace Amine-Associated Receptor
3362	TAC	U.S. Tactical Air Command (1946-1992)
3363	TACAN	Tactical Air Navigation
3364	TACCO	Tactical Coordinator
3365	TACCSF	U.S. Theater Aerospace Command & Control Simulation Facility
3366	TACDAR	Tactical Detection And Reporting
3367	TACSOP	Tactical SOP (Standing Operating Procedure)
3368	TADIL	Tactical Digital Information Link
3369	TAI	Target[ed] Area of Interest
3370	TAJ	Tom and Jerry
3371	TAJT	Tom and Jerry Tales
3372	TALES	Technical Advice and Lexicon for Enabling Simulation
3373	TANJ	There Ain't No Justice (used as expletive in the Ringworld novels)
3374	TANP	Terrain-Aware Network Planner
3375	TANSTAAFL	There Ain't No Such Thing As A Free Lunch (coined by author Robert A. Heinlein in his The Moon Is a Harsh Mistress)
3376	TAPPS	Texas Association of Private and Parochial Schools
3377	TARDIS	Time And Relative Dimension In Space (from Doctor Who)
3378	TAS	Tasmania (postal symbol)
3379	TASER	Thomas A. Swift's Electric Rifle
3380	TASM	Tactical Air-to-Surface Missile
3381	TAT	Tourism Authority of Thailand
3382	TATP	TriAcetone TriPeroxide
3383	TATT	Tired All The Time (medical diagnosis in-joke)
3384	Tb	Terbium
3385	TB	Tuberculosis
3386	TBA	to be announced
3387	TBBPA	TetraBromoBisPhenol-A
3388	TBD	to be done, or: to be documented, or: to be determined, or: to be decided
3389	TBF	to be fair
3390	TBH	To Be Honest
3391	TBL	Turkish Basketball League
3392	TBS	Turner Broadcasting System
3393	TBT	Tributyltin
3394	Tc	Technetium
3395	TCAA	Top Counter-Assault Agents
3396	TCAS	Traffic Collision Avoidance System
3397	TCCCS	Tactical Command,Control and Communication System
3398	TCD	Chad (ISO 3166 trigram)
3399	TCHD	Truck Cargo Heavy Duty
3400	TCL	Tool Command Language
3401	TCM	Turner Classic Movies
3402	TCU	Texas Christian University
3403	TCW	Tasty Coma Wife
3404	TCWMS	Tele-Center Workforce Management System
3405	TDA	The Disney Afternoon
3406	TDL	Tactical Data Link
3407	TDM	Time-Division Multiplexing
3408	TDMA	Time Division Multiple Access
3409	TDP	Technology Demonstration Programme
3410	TDRS	Tracking Data and Relay Satellite
3411	Te	Tellurium
3412	TEAL	Tasman Empire Airways Limited
3413	Team	Together everyone achieves more
3414	TEAMS	The East African Marine System (fiber optic cable)
3415	TED	Technology Entertainment Design prize
3416	TENCAP	Tactical Exploitation of National Capabilities
3417	TERS	Tactical Event Reporting System
3418	TES	Tactical Event System
3419	TEST	Thesaurus of Engineering and Scientific Terms
3420	TEU	Twenty-foot equivalent unit (cargo capacity)
3421	TeVeS	Tensor Vector Scalar theory
3422	TFMPP	Trifluorophenylmethylpiperazine
3423	TFR	Total Fertility Rate
3424	TFT	Thin-Film Transistor
3425	Tg	Teragram
3426	TG	Togo (ISO 3166 digram)
3427	TGO	Togo (ISO 3166 trigram)
3428	Th	Thorium
3429	THA	Thailand (ISO 3166 trigram)
3430	THAAD	Terminal High Altitude Area Defence
3431	THEGENTRY	The High-End Group of Earth's New Technologies Research Yield
3432	THEL	Tactical High Energy Laser ACTD
3433	THG	Tetrahydrogestrinone
3434	TIA	Total Information Awareness initiative
3435	TIA	Transient Ischemic Attack
3436	TIALD	Thermal Imaging and Airborne Laser Designation
3437	TIBS	Tactical Information Broadcast System
3438	TIC	Troops In Contact
3439	TIGERS	Topologically Integrated Geographic Encoding and Referencing System
3440	TINC	There Is No Cabal
3441	TIP	Thermal Identification Panel
3442	tits	Toes in the Sand
3443	TJD	Truncated Julian Day
3444	TJK	Tajikistan (ISO 3166 trigram)
3445	TKL	Tokelau (ISO 3166 trigram)
3446	TKM	Turkmenistan (ISO 3166 trigram)
3447	Tl	Thallium
3448	TLA	Three-Letter Abbreviation/Acronym
3449	TLAM	Tomahawk Land Attack Missile
3450	TLATOJL	The Life and Times of Juniper Lee
3451	TLPM	T1 Line Performance Monitor
3452	Tm	Terametre
3453	TMAP	Texas Medication Algorithm Project
3454	TMC	The Movie Channel
3455	TMD	Theatre Missile Defence
3456	TMDK	The Mighty Don't Kneel (Australian professional wrestling stable also active in Japan)
3457	TMI	Too Much Information
3458	TMJ	TemporoMandibular Joint (syndrome)
3459	TMNT	Teenage Mutant Ninja Turtles
3460	TMPG	Transparent Multi-Platform Gateway
3461	TMR	Twin Main Rotors (helicopter type)
3462	TMS	Transcranial Magnetic Stimulation
3463	TMT	Thirty Meter Telescope
3464	TMTOWTDI	There's Than One Way To Do It (from Perl)
3465	TNA	Total Nonstop Action Wrestling
3466	TNO	Trans-Neptunian Object
3467	TOBS	Time of OBServation
3468	TOC	Table Of Contents, Tactical Operations Centre, Temporo-Occipital transition Cortex, Top of Concrete
3469	TOG	Togo (IOC and FIFA trigram,but not ISO 3166)
3470	TOGS	Thermal Observation Gunnery Sight
3471	TOMS	Total Ozone Mapping Spectrometer (satellite instrument)
3472	TON	Tonga (ISO 3166 trigram)
3473	TOS	Tape Operating System,Terms of service,The Original Series,used to distinguish the first Star Trek TV series from other parts of the media franchise,Tramiel Operating System
3474	TOT	Time On Target
3475	TOW	Tube-launched,Optically tracked,Wire-guided (anti-tank missile)
3476	TP	East Timor (ISO 3166 digram; obsolete 2002),São Tomé and Príncipe (FIPS 10-4 country code),Training Practice,Trident Ploughshares
3477	TPE	Chinese Taipei (IOC and FIFA trigram for the country also known as Taiwan)
3478	TPI	The point is
3479	TPO	Thrombopoietin
3480	TPS	The Pennington School
3481	TPTB	The Powers That Be (often used to refer to the people responsible for the content of TV series or movies)
3482	TQ	Top Qualifier (similar to Pole Position in car racing)
3483	TRA	Technology iness Assessment
3484	TRAC	(U.S. Army) TRADOC Analysis Center
3485	TRACON	Terminal Radar Approach Control
3486	TRADOC	(U.S. Army) Training and Doctrine Command
3487	TRANSCOM	U.S. Transportation Command
3488	TRAP	Tactical Receive equipment and related Applications
3489	TRASANA	TRADOC Systems Analysis Agency
3490	TRD	Towed Radar Decoy
3491	TRIGAT	Third Generation Antitank (missile)
3492	TRL	Technology readiness level
3493	Trp	Troop
3494	TRU	Transuranic
3495	TRUEX	Training in Urban Environment Exercise
3496	TRW	Thompson Ramo Wooldridge Inc.
3497	Ts	Terasecond
3498	TS	Terasiemens,Thunderstorm (METAR code),Tunisia (FIPS 10-4 country code),TinySex,Transsexual, Tough Sh*t
3499	TSA	Theatre Storage Area,Time Slot Allocation,Transportation Security Administration,The Salvation Army
3500	TSEC	Transmission Security Encryption Code
3501	TSL	Transportation Security Laboratory
3502	TSN	The Sporting News (historic name of the periodical now known as Sporting News),The Sports Network
3503	TSO	The Stationery Office (was HMSO until 1996),(U.S.) TRICARE Support Office,Trans-Siberian Orchestra (band)
3504	TSOP	Tactical Standing Operation Procedure,The Sound of Philadelphia (classic 1970s R&B instrumental)
3505	TSR	Terminate and Stay Resident
3506	TSSIA	The Subject Says It All
3507	TT	Teratesla,Terrestrial Time,Tourist Trophy (Motorcycle sport),Trinidad and Tobago (ISO 3166 digram)
3508	TTCT	Torrance Tests of Creative Thinking
3509	TTFN	Ta Ta For Now
3510	TTL	Tax,Title,License,Through-the-lens (photography),Time 'till live,Time to live,Transistor-transistor logic
3511	TTO	Trinidad and Tobago (ISO 3166 trigram)
3512	TTP	Tactics,Techniques,and Procedures,Thrombotic thrombocytopenic purpura,Trailer Transfer Point
3513	TTTEAF	Thomas the Tank Engine and Friends
3514	TTY	TeleTYpewriter (Printer)
3515	TTYL	To You Later (Internet slang)
3516	TTZ	Tetrazolium
3517	TU	Technische Universität (German for 'Technical University'),Thammasat University (Thailand),Turkey (FIPS 10-4 country code)
3518	TUC	Trades Union Congress
3519	TUG	TeX Users Group
3520	TUI	Text-based user interface (cf. CLI),among other uses
3521	TUM	Technische Universität München (Germany)
3522	TUN	Tunisia (ISO 3166 trigram)
3523	TUNS	Technical University of Nova Scotia
3524	TUR	Turkey (ISO 3166 trigram)
3525	TUSK	Tank Urban Survival Kit
3526	TUV	Tuvalu (ISO 3166 trigram)
3527	TV	Television,Teravolt,Transvestite,Tuvalu (ISO 3166 and FIPS 10-4 country code digram)
3528	Tv	Time value,a designation seen on some camera dials for shutter priority mode
3529	TVA	Tennessee Valley Authority
3530	TVG	Television Games (Network),Tick,Very Good,Often used by School Teachers when marking homework etc. (Tick VG)[1][2]
3531	TVR	TreVor (Wilkinson) Racing
3532	TVS	Tornado vortex signature
3533	TW	Republic of China (Taiwan) (ISO 3166 and FIPS 10-4 country code digram),Terawatt
3534	TWAIN	Technology Without An Interesting Name
3535	TWE	Trans World Entertainment
3536	TWI	The Welding Institute
3537	TWIP	Take What Insurance Pays,When a surgeon agrees to accept a lower payment than he ordinarily would for a procedure and not charge the patient the difference
3538	TWN	Republic of China (Taiwan) (ISO 3166 trigram)
3539	TWP	Technical Working Paper
3540	TWS	Thermal Weapon Sight,Track While Scan
3541	TX	Texas (postal symbol),Transmit,Turkmenistan (FIPS 10-4 country code)
3542	TXV	Thermostatic Expansion Valve
3543	TYT	Take Your Time,Internet chat abbreviation
3544	TZ	Tanzania (ISO 3166 and FIPS 10-4 country code digram)
3545	TZA	Tanzania (ISO 3166 trigram)
3546	TZC	Tetrazolium chloride
3547	U	Uranium
3548	UA	Unit of Action
3549	UAAP	University Athletic Association of the Philippines
3550	UAB	University of Alabama at Birmingham
3551	UAP	Unidentified Areal Phenomana
3552	UAV	Unmanned Aerial Vehicle,Unprotected Anal and Vaginal sex,UB[edit]
3553	UBC	United Baptist Church,University of British Columbia
3554	UBI	Universal Basic Income
3555	UBIGEO	Ubicación Geografica (Spanish for Geographical Location)
3556	UBS	Unbundled Bitstream Services,United Bank of Switzerland,United Banque Suisse
3557	UCBSA	United Cricket Board of South Africa
3558	UCF	University of Central Florida
3559	UCLA	University of California at Los Angeles
3560	UCLES	University of Cambridge Local Examinations Syndicate
3561	UCR	University of California at Riverside
3562	UCR	University of Costa Rica
3563	UCS	Union of Concerned Scientists
3564	UCSB	University of California at Santa Barbara
3565	UCSD	University of California at San Diego
3566	UDAS	Uppsala-DLR Asteroid Survey
3567	UDDI	Universal Description,Discovery and Integration
3568	UDTS	Uppsala-DLR Trojan Survey
3569	UE	Unit of Employment
3570	UEFA	Union of European Football Associations
3571	UESAC	Uppsala-ESO Survey of Asteroids and Comets
3572	UFC	Ultimate Fighting Championship
3573	UFO	Unidentified Flying Object, or: United Farmers of Ontario
3574	UGV	Unmanned Ground Vehicle
3575	UHF	Ultra High Frequency
3576	UHMW	Ultra-High Molecular Weight
3577	UHRB	Ultra-High Resolution Building (simulation)
3578	UIC	University of Illinois at Chicago
3579	UID	User ID
3580	UIUC	University of Illinois at Urbana-Champaign
3581	UJTL	Universal Joint Task List
3582	UKIP	United Kingdom Independence Party
3583	UKR	Ukraine (ISO 3166 trigram)
3584	UL	Underwriters Laboratories
3585	ULF	Ultra Low Frequency
3586	UM	U.S. Minor Outlying Islands (postal symbol; ISO 3166 digram)
3587	UMCP	Unit Maintenance Collection Point
3588	UMES	University of Maryland Eastern Shore
3589	UMI	U.S. Minor Outlying Islands (ISO 3166 trigram)
3590	UMIST	University of Manchester Institute of Science and Technology
3591	UMTS	Universal Mobile Telecommunications System
3592	UN	United Nations
3593	UNABOM	University and airline bomber (FBI case name)
3594	UNAIDS	Joint United Nations Programme on HIV/AIDS
3595	UNAMSIL	United Nations Mission in Sierra Leone
3596	UNCF	United Negro College Fund
3597	UNCLOS	United Nations Convention on the Law of the Sea
3598	UNCSGN	United Nations Conference on the Standardization of Geographical Names
3599	UNCTAD	United Nations Conference on Trade and Development
3600	UNDCP	United Nations Drug Control Programme
3601	UNDE	Union of National Defence Employees (Canada)
3602	UNDP	United Nations Development Programme
3603	UNEP	United Nations Environment Programme
3604	UNFCCC	United Nations Framework Convention on Climate Change
3605	UNFICYP	United Nations Peacekeeping Force in Cyprus
3606	UNGEGN	United Nations Group of Experts on Geographical Names
3607	UNHCR	United Nations High Commission (er) for Refugees
3608	UNICEF	United Nations Children's Fund (originally the United Nations International Children's Emergency Fund)
3609	UNICRI	United Nations Interregional Crime and Justice Research Institute
3610	UNIDO	United Nations Industrial Development Organization
3611	UNIFEM	United Nations Development Fund for Women (from the French Fonds de développement des Nations unies pour la femme)
3612	UNLV	University of Nevada,Las Vegas
3613	UNMIK	United Nations Interim Administration Mission in Kosovo
3614	UNOSOM	United Nations Operations in Somalia
3615	UNPROFOR	United Nations Protection Force (in former Yugoslavia)
3616	UNRISD	United Nations Research Institute for Social Development
3617	UNSM	Union of Nova Scotian Municipalities
3618	UNTAC	United Nations Transitional Authority in Cambodia
3619	UNTAET	United Nations Transitional Administration in East Timor
3620	UNU	United Nations University
3621	UPdM	Università Popolare della Multimedialità
3622	UPF	Universitat Pompeu Fabra (Catalan for: 'Pompeu Fabra University')
3623	UPI	United Press International
3624	UPN	United Paramount Network
3625	UPU	Universal Postal Union
3626	UR	Soviet Union (NATO country code,obsolete 1992)
3627	URBSFA	Union royale belge des sociétés de football association (French for Royal Belgian Football Association)
3628	URD	User Requirements Document
3629	URI	University of Rhode Island
3630	URU	Uruguay (IOC and FIFA trigram, but not ISO 3166)
3631	URY	Uruguay (ISO 3166 trigram)
3632	US	United States (also ISO 3166 and FIPS 10-4 country code digram)
3633	USA	United States of America (also ISO 3166 trigram), United States Army
3634	USAADAC	U.S. Army Air Defense Artillery Center,Fort Bliss,Texas
3635	USAARMC	U.S. Army ARMor Center,Fort Knox,Kentucky
3636	USAAVNC	U.S. Army AViatioN Center,Fort Rucker,Alabama
3637	USAFSPC	U.S. Air Force Space Command
3638	USAIC	U.S. Army Infantry Center,U.S. Army Intelligence Center
3639	USAID	United States Agency for International Development
3640	USAP	Union Sportive des Arlequins Perpignanais,United States Antarctic Program
3641	USAPATRIOT	Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism
3642	USAREUR	United States Army Europe
3643	USB	Universal Serial Bus
3644	USC	United States Code,University of South Carolina,University of Southern California
3645	USCG	United States Coast Guard
3646	USCINCSPACE	United States Commander in Chief,Space Command
3647	USDA	United States Department of Agriculture
3648	USDI	United States Department of the Interior
3649	USDOE	United States Department of Energy
3650	USDRE	(U.S.) Under-Secretary of Defense for Research and Engineering (1978-1986)
3651	USEC	United States Enrichment Corporation
3652	USFL	United States Football League
3653	USFWS	United States Fish and Wildlife Service
3654	USGS	United States Geological Survey
3655	USIA	United States Information Agency
3656	USJFCOM	United States Joint Forces Command
3657	USL	United Soccer League,a third-level U.S. league. Not to be confused with an earlier league of the same name.,United Soccer Leagues,the organization that operates the above league,plus several other lower-level leagues,University of Southwestern Louisiana,a former name for the school now known as the University of Louisiana at Lafayette
3658	USMC	United States Marine Corps
3659	USMNT	United States men's national (soccer) team
3660	USN	United States Navy
3661	USNA	United States National Arboretum,United States Naval Academy
3662	USNB	United States Naval Base
3663	USNG	United States National Grid
3664	USNH	United States Naval Hospital
3665	USNI	United States Naval Institute
3666	USNO	U.S. Naval Observatory
3667	USNOFS	United States Naval Observatory Flagstaff Station
3668	USNP	United States Newspaper Program
3669	USNR	United States Navy Reserve
3670	USNS	United States Naval Ship
3671	USNY	University of the State of New York (usually pronounced 'use-knee')
3672	USNZ	University Sport New Zealand
3673	USPS	United States Postal Service
3674	USPTO	United States Patent and Trademark Office
3675	USR	User
3676	USS	United States ship (sometimes meaningless; see Star Trek)
3677	USSPACECOM	United States Space Command
3678	USSR	Union of Soviet Socialist Republics
3679	UST	Underground Storage Tank
3680	USTRANSCOM	United States Transportation Command
3681	USWNT	United States women's national (soccer) team
3682	UT	Universal Time
3683	UTEP	University of Texas at El Paso (pronounced you-tep)
3684	UTM	Universal Transverse Mercator (geographical co-ordinate system)
3685	UUA	Unitarian Universalist Association
3686	UUID	Universally Unique Identifier (see also GUID)
3687	UUV	Unmanned Underwater Vehicle
3688	UW	University of Washington
3689	UWO	University of Western Ontario
3690	UWT	Under Water Telephone
3691	UWTG	Under Water Tug
3692	UWW	United World Wrestling
3693	UXO	Unexploded Ordnance
3694	UY	Uruguay (ISO 3166 and FIPS 10-4 country code digram)
3695	UZ	Uzbekistan (ISO 3166 and FIPS 10-4 country code digram)
3696	UZB	Uzbekistan (ISO 3166 trigram)
3697	VACIS	Vehicle And Container Inspection System
3698	VACIS	Victorian Ambulance Clinical Information System
3699	VANOS	Variable Nockenwelle System
3700	VAO	Vienna Art Orchestra
3701	VAT	Vatican City-State (ISO 3166 trigram)
3702	VBA	Visual Basic for Applications
3703	vCJD	Variant Creutzfeldt-Jakob Disease
3704	VCNO	(U.S.) Vice Chief of Naval Operations
3705	VCofS	Vice Chief of Staff
3706	VCR	Video cassette recorder
3707	VCT	Saint Vincent and the Grenadines (ISO 3166 trigram)
3708	VDFS	VisualSVN Distributed File System (VDFS)
3709	VE	Venezuela (ISO 3166 digram)
3710	VEEGA	Venus Earth Earth Gravity Assist manœuvre
3711	VEN	Venezuela (ISO 3166 trigram)
3712	VERITAS	Very Energetic Radiation Imaging Telescope Array System
3713	VfD	s for deletion (used in Wikipedia)
3714	VFM	Value For Money
3715	VFMO	Very Fast Moving Object (astronomy)
3716	VFT	Virtual Function Table
3717	VFW	Veterans of Foreign Wars
3718	VG	British Virgin Islands (ISO 3166 digram)
3719	VGB	British Virgin Islands (ISO 3166 trigram)
3720	VH1	Video Hits One
3721	VHF	Very High Frequency
3722	VIA	Versatile Interface Adapter
3723	VIDS	Visual Information Display System
3724	VII	7 (in Roman numerals)
3725	VIII	8 (in Roman numerals)
3726	VIN	Vehicle Identification Number (ISO 3779)
3727	VIP	Very Important Person
3728	VISCII	VIetnamese Standard Code for Information Interchange
3729	VIT	Vellore Institute of Technology
3730	VIVO	Video In Video Out
3731	VJ	Video Jockey
3732	VLAD	Vertical Line Array DIFAR
3733	VLBA	Very Long Baseline Array
3734	VLF	Very Low Frequency
3735	VLIW	Very Long Instruction Word
3736	VLPFC	VentroLateral PreFrontal Cortex
3737	VLPMC	VentroLateral PreMotor Cortex
3738	VLSI	Very-large-scale integration
3739	VM	Vietnam (FIPS 10-4 country code)
3740	VMF	Marine Fighting Squadron of the United States Marine Corps
3741	VMF	Variable Message Format
3742	VMN	VentroMedial Nucleus (neurophysiology)
3743	VN	Vietnam (ISO 3166 digram)
3744	VNIR	Visible and Near InfraRed
3745	VNM	Vietnam (ISO 3166 trigram)
3746	VNS	see entry
3747	VOA	Voice of America
3748	VOIP	Voice Over Internet Protocol
3749	VOLT	Visual OpenType Layout Tool
3750	VON	Victorian Order of Nurses
3751	VOR	Voice of Russia
3752	VOX	Voice Operated oscillator
3753	VPOTUS	Vice President of the United States
3754	VR	Virtual Reality
3755	VRSG	Virtual Reality Scene Generator
3756	VSAT	Very Small Aperture Terminal ('vee-satt')
3757	VSHORAD	Very Short Range Air Defence
3758	VSO	Voluntary Services Overseas
3759	VSR	Very Special Relativity
3760	VTC	Video Tele-Conference
3761	VTEC	Variable valve Timing and Electronic lift Control
3762	VU	Vanuatu (ISO 3166 digram), Vedanta University
3763	VUB	Vrije Universiteit Brussel (Belgian university)
3764	VUT	Vanuatu (ISO 3166 trigram)
3765	VV	Via Voice,Village Voice
3766	VVAF	Vietnam Veterans of America Foundation
3767	VW	Volkswagen
3768	VZ	Verizon Communications (NYSE code)
3769	W	Tungsten (from German Wolfram),Watt,West
3770	W3C	World Wide Web Consortium
3771	WA	Namibia (from West Africa),Washington state (postal symbol),Western Australia (postal symbol),World Archery (Federation)
3772	WAAC	Women's Army Auxiliary Corps (Britain) (World War I UK)
3773	WAAF	Women's Auxiliary Air Force (World War II UK)
3774	WAC	Western Athletic Conference,Women's Auxiliary Corps (World War II Canada),Women's Army Corps (World War II U.S.)
3775	WACC	Weighted Average Cost of Capital (accounting)
3776	WACS	What-A-Cartoon! Show
3777	WAD	Weapons Alert Designator
3778	WAGGGS	World Association of Girl Guides and Girl Scouts
3779	WAGs	Wives And Girlfriends (most notably of England national football team players at the 2006 FIFA World Cup,although the term existed earlier)
3780	WAL	see entry
3781	WAPIMA	What a pain in my ass
3782	WAR	With All Respect
3783	WAsP	Short form of WAAAAP (Wind Atlas Analysis and Application Program)
3784	WAYP	White And Yellow Pages
3785	WB	Warner Bros.,Welcome Back (Internet shorthand)
3786	Wb	Weber
3787	WBA	Warner Bros. Animation,West Bromwich Albion (F.C.),World Boxing Association
3788	WBC	World Boxing Council
3789	WBE	Work Breakdown Element
3790	WBO	World Boxing Organization
3791	WC	Water Closet,Winston Churchill,World Cup (sports)
3792	WCBO	World Chess Boxing Organisation
3793	WCBP	World Center for Birds of Prey
3794	WCL	World Confederation of Labour
3795	WCS	Weapon Control Status,Wildlife Conservation Society
3796	WCW	World Championship Wrestling
3797	WDC	Western Design Center,World Data Center
3798	WDIN	Wildlife Disease Information Node
3799	WDWR	Walt Disney World Resort
3800	WEBS	Weapon Effectiveness Battle Simulation
3801	WEC	World Extreme Cagefighting
3802	WEEE	Waste Electrical and Electronic Equipment
3803	WEF	World Economic Forum
3804	WEM	West Edmonton Mall
3805	WEU	Western European Union
3806	WEZ	Weapon Engagement Zone
3807	WF	Wallis and Futuna Islands (ISO 3166 digram)
3808	WFC	Women's Forage Corps (World War II UK)
3809	WFD	Weapon of Focused Destruction
3810	WFF	Wallops Flight Facility
3811	WFI	Water for Injection
3812	WFH	Working from home
3813	WFP	World Food Program
3814	WFZ	Weapons Free Zone
3815	WH	Wehrmacht Heer (German World War II army vehicle licence plate code)
3816	WHAM	Wisconsin Hydrogen-Alpha Mapping (telescope)
3817	WHI	Women's Health Initiative
3818	WHIP	Walks plus hits per inning pitched
3819	WHO	World Health Organisation
3820	WHS	(U.S.) Washington Headquarters Services
3821	WI	Western Sahara (FIPS 10-4 country code),Wisconsin (postal symbol),Women's Institute
3822	WIA	Wounded In Action,Wireless Institute of Australia (Amateur Radio)
3823	WIIFM	What's in it for me?
3824	WIMP	Weakly Interacting Massive Particle, Windows,Icons,Menus,Pointers
3825	WIP	Work In Progress
3826	WIPO	World Intellectual Property Organization
3827	WIPP	[Nuclear] Waste Isolation Pilot Plant
3828	WIYN	Wisconsin Indiana Yale NOAO telescope consortium
3829	WK	Wake Island (ISO 3166 digram,obsolete 1986)
3830	WKYP	Will Keep You Posted
3831	WL	Wehrmacht Luftwaffe (German World War II air force vehicle licence plate code)
3832	WLB	Women's Land Brigade (World War II Canada)
3833	WLF	Wallis and Futuna Islands (ISO 3166 trigram)
3834	WLOG	Without Loss Of Generality (see WOLOG)
3835	WM	Wehrmacht Marine (German World War II navy vehicle licence plate code)
3836	WMANUS	West Midlands Area National Union of Students
3837	WMD	World Movement for Democracy
3838	WMI	Wildlife Management Institute
3839	WMO	World Meteorological Organization
3840	WNA	World Nuclear Association
3841	WNF	Will Not Fix
3842	WNIT	Women's National Invitation Tournament
3843	WNSD	What's New,Scooby-Doo?
3844	WNW	West North-West
3845	WO	Warrant Officer
3846	WOF	Width of Fabric
3847	WOFT	Waste Of Fucking Time
3848	WOFTAM	Waste Of Fucking Time And Money
3849	WOI	Wheels Of Italy
3850	WOM	Write Only Memory
3851	WOS	Wilson Ornithological Society
3852	WOSM	World Organization of the Scout Movement, Worldwide Oil Spill Model
3853	WOT	Waste Of Time
3854	WP	White Phosphorus (ammunition)
3855	WPB	War Production Board during World War II
3856	WPE	World Pork Expo
3857	WPK	Wider Peacekeeping
3858	WPT	World Poker Tour,World Premiere Toons
3859	WR	Wide Receiver (football)
3860	WRAC	Women's Royal Army Corps (World War II UK)
3861	WRAIR	Walter Reed Army Institute of Research
3862	WRBWWRM	We Best What We Most
3863	WRC	World Rally Championship
3864	WRC	World Religions Conference
3865	WRNG	Warning
3866	WRS	Worldwide Reference System
3867	WRT	With respect to (especially in fields such as Mathematics)
3868	WRT	NHS Workforce Review Team
3869	WRT	The Linksys routers whose model name start with 'WRT'
3870	WRT	Third party firmware for the Linksys WRT routers and compatible models from other vendors.
3871	WRT	Wallace Roberts & Todd,LLC (Urban Planning and Design)
3872	WRT	Web Runtime (WRT) is a portable application framework developed by Nokia that allows the creation of widgets on the S60 Platform.
3873	WRT	Wholesale,Trade,Retail sector,category in employment and economics statistics
3874	WRT	Wireless Receiver/Transmitter (computer networks/IT)
3875	WRT	Wireless Ronin Technologies (digital signage)
3876	WRT	World Rally Team
3877	WRT	Writer Response Theory
3878	WRVS	Women's Royal Voluntary Service,now only known by the acronym (UK)
3879	WS	Samoa (ISO 3166 and FIPS 10-4 country code digram; from the country's former name of Western Samoa),Writer to the Signet (a Scottish solicitor)
3880	WSC	Weapon System Catalogue
3881	WSDL	Web Services Description Language
3882	WSJ	(The) Wall Street Journal
3883	WSL	White Star Line (shipping company),Women's Super League,used to describe England's top women's association football league and top women's rugby union competition,Workers' Socialist League (UK political party)
3884	WSROC	Western Sydney Regional Organisation of Councils
3885	WSSM	Winchester Super Short Magnum (family of rifle cartridges)
3886	WSTC	Women Signallers Territorial Corps (World War II UK)
3887	WSW	West South-West
3888	WTB	Wales Tourism Board,Warenterminbörse Hannover
3889	WTC	World Trade Center
3890	WTF	What the fuck?; also What a Terrible Failure (android)
3891	WTFH	What The Fucking Hell
3892	WTH	What the Hell
3893	WTO	World Trade Organization
3894	WU	Wabash University,Washington University in St. Louis,Western Union,Windows Update,Work unit,WU Wien (German Wirtschaftsuniversität Wien,Vienna University of Economics and Business Administration)
3895	WUBU2	What you been up to
3896	WUU2	What you up to (Internet slang popular with teenagers)
3897	WV	West Virginia (postal symbol)
3898	WVA	World Veterinary Association
3899	WVIAC	West Virginia Intercollegiate Athletic Conference
3900	WVR	Women's Volunteer Reserve (World War II UK)
3901	WVSC	Women's Volunteer Service Corps (World War II Canada)
3902	WVU	West Virginia University
3903	WW	see entry
3904	WWE	World Wrestling Entertainment
3905	WWI	World War I
3906	WWII	World War II
3907	WWIII	World War III
3908	WWJD	What would Jesus do?
3909	WWS	Wheaton Warrenville South High School
3910	WWWF	World Wide Wrestling Federation
3911	WXO	Weather [Executive] Officer
3912	WY	Wyoming (postal symbol)
3913	WZ	Swaziland (FIPS 10-4 country code)
3914	XBML	eXtended Business Modelling Language
3915	XC	Ninety (in Roman numerals)
3916	XCBL	XML Common Business Library
3917	XD	Used in chatrooms or email for smiley face. X is the eyes; squinted D is the mouth; XD.
3918	Xe	Xenon
3919	XFA	XML Forms Architecture
3920	XFC	Xtreme Fighting Championships
3921	XFD	Fighter aircraft made by Douglas
3922	Xfe	X File Explorer
3923	XFF	X-Forwarded-For
3924	XFG	Exfoliation glaucoma
3925	XFR	Automobile made by Jaguar
3926	XFT	X FreeType interface library
3927	XG	Automobile made by Hyundai
3928	XGA	Extended Graphics Array
3929	XGP	Extreme Game Player
3930	XHTML	eXtensible Hypertext Markup Language
3931	XI	Eleven (in Roman numerals)
3932	XII	Twelve (in Roman numerals)
3933	XIII	Thirteen (in Roman numerals)
3934	XIV	Fourteen (in Roman numerals)
3935	XIX	Nineteen (in Roman numerals)
3936	XJS	Automobile made by Jaguar
3937	XKB	X keyboard extension
3938	XKE	Automobile made by Jaguar
3939	XKR	Automobile made by Jaguar
3940	XML	eXtensible Markup Language
3941	XMSF	eXtensible Modelling and Simulation Framework
3942	XNA	X-No-Archive,Xeno Nucleic Acid
3943	XNC	X Northern Captain
3944	XNU	X is Not Unix
3945	XP	eXperience Point (role-playing games)
3946	XQJ	XQuery API for Java™
3947	XRAY	X-Ray
3948	XRML	eXtensible Rights Markup Language
3949	XS	Xiaolin Showdown
3950	XSL	eXtensible Style Language
3951	XTMH	eXtreme Technology Multiprocessor Hyperlanguage
3952	XUL	XML User Interface Language
3953	XV	Fifteen (in Roman numerals)
3954	XVI	Sixteen (in Roman numerals)
3955	XVII	Seventeen (in Roman numerals)
3956	XVIII	Eighteen (in Roman numerals)
3957	XWF	Xcitement Wrestling Federation
3958	XX	Twenty (in Roman numerals)
3959	Xyl	Xylobium
3960	XZN	Triple square screw driver
3961	y	Yocto-
3962	Y2K	Year Two Thousand
3963	yA	Yoctoampere
3964	Ya	Yottayear
3965	YaBPr	Yet another Brother Pat rant
3966	YABSLAG	Yet another boy singing like a girl
3967	YAC	Youth-Adult Committee
3968	YAFLA	Yet Another Five Letter Abbreviation
3969	YAP	Young Aspiring Professional
3970	YB	Youcef Benzouada (Southern Algerian name)
3971	Yb	Ytterbium
3972	yC	Yoctocoulomb
3973	YC	Yottacoulomb
3974	YDS	Yosemite Decimal System (climbing)
3975	YE	Yemen (ISO 3166 digram)
3976	YEM	Yemen (ISO 3166 trigram)
3977	yF	Yoctofarad
3978	YF	Yottafarad
3979	yg	Yoctogram
3980	Yg	Yottagram
3981	YGCO	Yamaneko Group of Comet Observers
3982	Ygo	Yu-Gi-Oh!
3983	yH	Yoctohenry
3984	YH	Yottahenry
3985	YHBT	You Have Been Trolled
3986	YHII	You Have It Inside
3987	YHS	Ya Hoor sur!
3988	Yi	Yobi
3989	Yippie	Youth International Party + suffix
3990	yJ	Yoctojoule
3991	YJ	Yottajoule
3992	yK	Yoctokelvin
3993	YK	Yottakelvin
3994	YKYFCW	You know you're from Christchurch when (post-earthquake joke)
3995	yL	Yoctolitre
3996	YL	Yottalitre
3997	ym	Yoctometre
3998	Ym	Yottametre
3999	YMMD	You Make My Day
4000	yN	Yoctonewton
4001	YN	Yottanewton
4002	YOLO	You Only Live Once
4003	YPA	Yards per Pass Attempt (football statistic)
4004	YPIO	Your Problem Is Obvious
4005	YPO	Young Presidents' Organization
4006	ys	Yoctosecond
4007	yS	Yoctosiemens
4008	Ys	Yottasecond
4009	YS	Yottasiemens
4010	YSI	Young Scots for Independence
4011	yT	Yoctotesla
4012	YTD	Year-To-Date
4013	YTM	Yield to Maturity
4014	YTS	Youth Training Scheme
4015	YTT	Yoshi Topsy-Turvy
4016	Yuppie	Young Urban Professional + suffix
4017	yV	Yoctovolt
4018	YV	Yottavolt
4019	yW	Yoctowatt
4020	YW	Yottawatt
4021	YYH	YuYu Hakusho
4022	z	Zepto
4023	Z	Zetta
4024	zA	Zeptoampere
4025	ZAF	South Africa (ISO 3166 trigram)
4026	ZAMS	Zero age main sequence
4027	ZAS	Zylinder Abschaltung System
4028	ZBT	Zero-Balance Transfer (accounting)
4029	zC	Zeptocoulomb
4030	ZC	Zettacoulomb
4031	ZCM	(n) ZENworks Configuration Management
4032	ZCMK	Zone Control Master Key
4033	ZCU	Zimbabwe Cricket Union
4034	\a	Atto-