PowerShell/data/dicts/general.csv

1	TERM	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	ACAB	All cops are bastards
83	ACARS	Aircraft Communications Addressing and Reporting System
84	ACB	Asociación de Clubes de Baloncesto (Spanish for 'Association of Basketball Clubs')
85	ACCAC	Awdurdod Cymwysterau,Cwricwlwm ac Asesu Cymru (Qualifications,Curriculum and Assessment Authority for Wales)
86	ACCD	American Coalition of Citizens with Disabilities
87	ACCS	Air Communications and Control Squadron
88	ACDA	Arms Control & Disarmament Agency
89	ACDC	Alternating Current Direct Current,the name of an Australian rock music band,a term for a bisexual person,A/Cdre,Air Commodore
90	ACDT	Apple Certified Desktop Technician,Australian Central Daylight Time
91	ACES	Aerolíneas Centrales de Colombia (Spanish,'Central Colombian Airlines'),Auxiliary Campus Enterprises and Services of Alfred State College
92	ACF	Administration for Children and Families,American Car and Foundry,American Culinary Federation
93	ACHT	Average Call Hold Time
94	ACINT	Acoustic Intelligence
95	ACK	Acknowledge (telecommunications; cf. NAK)
96	ACL	Access Control List,Anterior cruciate ligament; the initialism can also refer to an injury to this ligament.,Atlantic Coast Line Railroad
97	ACLJ	American Center for Law and Justice
98	ACLOS	Automatic CLOS (missile control system)
99	ACLS	American Council of Learned Societies
100	ACLU	American Civil Liberties Union,American Communist Lawyers Union (pejorative slang for the above)
101	ACM	many,including Association for Computing Machinery; see entry
102	ACMC	(U.S.) Assistant Commandant of the Marine Corps
103	ACN	Airborne Communications Node,Australian Company Number (number issued by the Australian government as registration of a limited liability company)
104	ACNA	Anglican Church in North America
105	ACO	Airspace Control Order
106	ACOBA	Advisory Committee on Business Appointments
107	ACOG	American College of Obstetricians and Gynecologists
108	ACOM	(U.S.) Atlantic Command
109	ACORN	Association of Community Organizations for Reform Now
110	ACP	African,Caribbean and Pacific Group of States,Air Control Point
111	ACR	Advanced Concepts and Requirements
112	ACRI	African Crisis Initiative
113	ACRT	Advanced Concepts Research Tool simulator
114	ACS	Affiliated Computer Services (NYSE ACS),Alaska Communications Service,American Cancer Society,American Chemical Society,Association of Caribbean States,Australian Computer Society
115	ACSC	Army Command and Staff College (various nations)
116	ACST	American Cooperative School of Tunis
117	ACST	Australian Central Standard Time
118	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
119	ACTD	Advanced Concept Technology Demonstration
120	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)
121	ACTU	Australian Council of Trade Unions
122	ACU	American Conservative Union
123	ACUF	Advisory Committee on Undersea Features,American Conservative Union Foundation
124	AD	Anno Domini (Latin for 'In the year of our Lord')
125	ADA	Air Defence Artillery,American Dental Association,Assistant District Attorney,Americans with Disabilities Act (see also the similar but non-acronymic Ada programming language)
126	ADAC	Allgemeiner Deutscher Automobil-Club (German for 'General German Automobile Club')
127	ADAGE	Air Defense Air to Ground Engagement (simulation)
128	ADAP	AIDS Drug Assistance Program
129	ADAS	Asiago-DLR Asteroid Survey
130	ADAT	Alesis Digital Audio Tape (recording format)
131	ADATS	Agricultural Development and Training Society,Air Defence Anti-Tank System,Australian Defence Air Traffic System
132	ADB	Asian Development Bank
133	ADC	Aide De Camp,U.S. Air Defense Command (1946-1992),Apple Display Connector,Program Against Digital Counterfeiting of Currency
134	ADD	Analog Digital Digital (CD quality),Attention-Deficit Disorder,Administration on Developmental Disabilities
135	ADDIE	Analyze Design Develop Implement and Evaluate
136	ADDNS	Advanced Deployable Day/Night Simulation
137	ADGB	Air Defence of Great Britain
138	ADHD	Attention-Deficit Hyperactivity Disorder
139	ADHS	Attention-Deficit Hyperactivity Syndrome
140	ADI	Acceptable/Allowable Daily Intake
141	ADL	Anti-Defamation League
142	ADM	Administrative,,Admiral,and the U.S. Public Health Service Commissioned Corps,Archer Daniels Midland,Assistant Deputy Minister
143	ADOA	Air Defence Operations Area
144	ADP	Adenosine DiPhosphate,Army Doctrine Publication (UK,Canada,Australia),Automatic/Automated Data Processing
145	ADRG	Arc-second Raster Chart (ARC) Digitized Raster Graphics
146	ADS	Active Denial System, Astrophysics Data System, Attention Deficit Syndrome
147	ADSR	Attack,Decay,Sustain,Release (sound envelope specification)
148	ADT	Atlantic Daylight Time (UTC−3 hours)
149	ADTB	Army Doctrine and Training Bulletin
150	ADW	Air Defence Warning
151	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
152	AEDT	Australian Eastern Daylight Time
153	AEF	American Expeditionary Force
154	AEGIS	Airborne Early warning Ground environment Interface Segment (fake etymology)
155	AESR	Aeronautical Equipment Service Record
156	AEST	Australian Eastern Standard Time
157	aet	After extra time (Football)
158	AEW	Airborne Early Warning,Airborne Electronic Warfare
159	AF	Afghanistan (ISO 3166 digram),Air Force,As f*ck
160	aF	Attofarad
161	AFA	U.S. Air Force Academy,Asociación del Fútbol Argentino (Spanish for 'Argentine Football Association')
162	AFAIC	As Far As I'm Concerned
163	AFAICT	As Far As I Can Tell
164	AFAIK	As Far As I Know
165	AFAIR	As Far As I Remember/Recall
166	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
167	AFATDS	Advanced Field Artillery Tactical Data System
168	AFCEA	Armed Forces Communications and Electronics Association
169	AFDB	African Development Bank
170	AFES	Automatic Fire Extinguishing System
171	AFG	Afghanistan (ISO 3166 trigram)
172	AFI	French Territory of the Afars and Issas (ISO 3166 trigram; obsolete since 1977),'Agencia Federal de Investigaciónes' (México)
173	AFIST	Abrams Full Crew Interactive Skills Trainer
174	AFJ	April Fool's Joke
175	AFK	Away From Keyboard (Internet chat abbreviation)
176	AFLAC	American Family Life Assurance Company of Columbus
177	AFO	Association of Field Ornithologists
178	AFOSR	U.S. Air Force Office of Scientific Research
179	AFP	Agence France-Presse (French,'French Press Agency'), Australian Federal Police
180	AFQT	Armed Forces Qualification Test
181	AFRC	Air Force Reserve Command
182	AFRL	Air Force Research Laboratory
183	AFROTC	Air Force Reserve Officer Training Corps
184	AFRRI	(U.S.) Armed Forces Radiobiology Research Institute
185	AFRTS	Armed Forces Radio and Television Service
186	AFSC	U.S. Air Force Staff College (obsolete; replaced with JFSC), U.S. Air Force Systems Command
187	AFSCN	U.S. Air Force Satellite Control Network
188	AFSPC	Air Force Space Command
189	AFT	American Farmland Trust
190	AFV	armoured fighting vehicle
191	AG	air gunner,Aktiengesellschaft (German,'incorporated'),Antigua and Barbuda (ISO 3166 digram),Assemblies of God
192	ag	Attogram
193	Ag	Silver (Latin for 'argentum')
194	AGA	AB Gas-accumulator ('ah-gah',Swedish company),Advanced Graphics Architecture
195	AGARD	Advisory Group for Aerospace Research and Development
196	AGARDograph	Advanced Guidance for Alliance Research and Development publication
197	AGASA	Akeno Giant Air Shower Array (cosmic ray detector)
198	AGB	Internal Nintendo initialism (Advanced Game Boy) for Game Boy Advance
199	AGC	Adjutant General's Corps (British Army)
200	AGDC	Australian Game Developers' Conference
201	AGI	Auxiliary Group Intelligence
202	AGM	Annual General Meeting
203	AGN	Active Galactic Nucleus
204	AGO	Angola (ISO 3166 trigram)
205	AGP	Accelerated Graphics Port
206	AGRICOLA	Agriculture Online Access
207	AGS	Alaska Ground Station (LandSat)
208	AGTS	Advanced Gunnery Training System
209	AGU	American Geophysical Union
210	AGW	Autonomous Guided Weapon
211	Ah	Ampere-hour
212	AH	Attack Helicopter
213	aH	Attohenry
214	AHA	American Heart Association
215	AHCPR	Agency for Health Care Policy and Research (obsolete; replaced with AHRQ)
216	AHEC	Australian Health Ethics Committee
217	AHPCRC	Army High Performance Computing Research Center
218	AHQ	Air Headquarters
219	AHRQ	Agency for Healthcare Research and Quality
220	AHS	American Housing Survey
221	AI	Air Interdiction,Amnesty International,Artificial Insemination,Artificial Intelligence,Anguilla (ISO 3166 digram)
222	AIA	Aerospace Industries Association,American Institute of Architects,Anguilla (ISO 3166 trigram)
223	AIAA	American Institute of Aeronautics and Astronautics
224	AIC	African Independent Church,Animal Identification Coordinator
225	AICD	Australian Institute of Company Directors
226	AICMFP	And I Claim My Five Pounds
227	AID	U.S. Agency for International Development
228	AIDS	Acquired Immune Deficiency Syndrome
229	AIM	Australian Institute of Management
230	AIMP	Aurora Incremental Modernization Project
231	AIPAC	American Israel Public Affairs Committee
232	AIR	Aircraft Inventory Record
233	AIRFA	American Indian Religious Freedom Act
234	AIRS	Aerometric Information Retrieval System (obsolete; replaced with AFS)
235	AIS	Australian Institute of Sport,Automatic Identification System
236	AISB	(British Society for the Study of) Artificial Intelligence and the Simulation of Behaviour
237	aJ	Attojoule
238	Ajax	Asynchronous JavaScript And XML
239	AJD	Astronomical Julian day
240	AJP	Allied Joint Publication
241	AJPW	All Japan Pro Wrestling
242	AK	Alaska (postal symbol)
243	aK	Attokelvin
244	AKA	Above knee amputation (orthopaedic usage)
245	AKDT	Alaska Standard Daylight Saving Time (UTC−8 hours)
246	AKP	Adalet ve Kalkınma Partisi (Turkish,'Justice and Development Party')
247	AKST	Alaska Standard Time (UTC−9 hours)
248	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)
249	Al	Aluminium
250	aL	Attolitre
251	ALA	Åland Islands (ISO 3166 trigram)
252	ALAP	As Long/Late As Possible
253	ALARM	Air-Launched Anti-Radar Missile
254	ALB	Albania (ISO 3166 trigram)
255	ALD	Accounting Line Designator (nuclear weapon targeting)
256	ALERT	Advanced Linked Extended Reconnaissance and Targeting,Attack and Launch Early Reporting to Theatre
257	ALF	Africa Leadership Forum,Alien Life Form (cf. ALF (TV series)),Animal Liberation Front
258	ALG	Algeria (IOC and FIFA trigram,but not ISO 3166)
259	ALGOL	ALGOrithmic Language
260	ALPA	Air Line Pilots Association
261	ALS	Amyotrophic Lateral Sclerosis
262	ALSHS	Abraham Low Self-Help Systems
263	ALSP	Aggregate Level Simulation Protocol
264	ALTE	Association of Language Testers in Europe
265	Am	Americium
266	AM	Amplitude Modulation and Ante Meridiem; see entry,Armenia (ISO 3166 digram)
267	AM1	Airman 1st class
268	AMCB	U.S. Army/Marine Corps Board
269	AMFOM	Advanced Missile Fly Out Model
270	AMFR	Age-specific Marital Fertility Rate,Amplitude Modulation Following Response
271	AMFRS	Advanced Multi-Function Radio Frequency System,Automatic Multisensor Feature-based Recognition System
272	AML	Acute Myeloid Leukaemia
273	AMLCD	Active Matrix Liquid Crystal Display
274	AMLO	Andrés Manuel López Obrador (Mexican politician),Anti-Money Laundering Office (Thailand government agency)
275	AMO	Atlantic Multidecadal Oscillation
276	AMOLED	Active-matrix organic light-emitting diode
277	AMOS	Advanced MOrtar System,Air Force Maui Optical and Supercomputing observatory
278	AMP	Adenosine MonoPhosphate,Automated Mission Planner
279	AMRAAM	Advanced Medium-Range Air-to-Air Missile
280	AMRDEC	U.S. Aviation & Missile Research,Development,& Engineering Center
281	AMS	Agriculture Marketing Service,American Mathematical Society
282	AMSAA	U.S. Army Materiel Systems Analysis Activity
283	AMSO	U.S. Army Model and Simulation Office
284	AMSU	Advanced Microwave Sounding Unit
285	AMTE	UK Admiralty Marine Technology Establishment (1977-1984)
286	AN	Netherlands Antilles (ISO 3166 digram)
287	aN	Attonewton
288	ANA	Administration for Native Americans,Afghan National Army,All Nippon Airways,Anti-Nuclear Anti-body,Australian National Airways,Australian Natives' Association
289	ANC	African National Congress
290	AND	Andorra (ISO 3166 trigram)
291	ANFO	Ammonium nitrate/fuel oil (explosive)
292	ANGLiCo	Air/Naval Gunfire Liaison Company
293	ANL	Argonne National Laboratory
294	ANM	Acoustic Noise Monitor
295	ANOVA	ANalysis Of VAriance
296	ANS	Applied and Natural Sciences
297	ANSI	American National Standards Institute
298	ANT	Netherlands Antilles (ISO 3166 trigram),Antigua and Barbuda (IOC trigram,but not ISO 3166 or FIFA)
299	ANTM	America's Next Top Model
300	ANTY	Acronyms,No Thank You
301	ANWR	Arctic National Wildlife Refuge /ˈænwɑr/
302	ANZ	Australia and New Zealand Banking Group
303	ANZAC	Australian and New Zealand Army Corps
304	AO	Angola (ISO 3166 digram),Approach Officer (submarine),Area of Operations
305	AOC	Air Operations Centre,Air Officer Commanding
306	AOD	Adrenalin O.D. (punk rock band)
307	AOI	Angle Of Incidence (Arab Organization for Industrialization)
308	AOL	America OnLine
309	AOR	Area of Responsibility
310	AOSTH	Adventures of Sonic the Hedgehog
311	AOTS	Attack of the Show!
312	AOU	American Ornithologists' Union
313	AP	Advanced Placement,Air Publication,Andhra Pradesh (Indian state code),Armed Forces Pacific (postal symbol),Associated Press,Auto Pilot
314	APB	All Points Bulletin (police jargon)
315	APEC	Asia Pacific Economic Cooperation
316	APEDS	AMSAA Performance Estimates Data System
317	APEX	Applied Physics Express
318	APHA	American Public Health Association
319	APHIS	Animal and Plant Health Inspection Service
320	APL	Acute Promyeloid Leukaemia,Anti-Personnel Landmine,Applied Physics Laboratory (Johns Hopkins University)
321	APOD	Aerial Port (Airport) Of Debarkation
322	APOE	Aerial Port (Airport) Of Embarkation
323	APOLLO	Apache Point Observatory Lunar Laser-ranging Operation
324	APP	Allied Procedural Publication
325	APR	Annual Percentage Rate
326	AQIM	Al-Qaeda in the Islamic Maghreb
327	AR	Argentina (ISO 3166 digram),Arkansas (postal symbol),Armour,Arunachal Pradesh (Indian state code)
328	Ar	Argon
329	ARAG	Advanced Research and Assessment Group
330	ARB	Administrative Review Board
331	ARBA	Army Review Boards Agency
332	ARCA	Automobile Racing Club of America
333	ARCENT	United States Army Central Command
334	ARDA	Advanced Research and Development Activity (became DTO 2006)
335	ARF	ASEAN Regional Forum
336	ARG	Argentina (ISO 3166 trigram)
337	ARH	Armed Reconnaissance Helicopter
338	ARNet	Acquisition Reform Network
339	ARP	Applied Research Programme
340	ARPA	Advanced Research Projects Agency
341	ARRC	ACE Rapid Reaction Corps
342	ARRF	Allied Rapid Reaction Force
343	ARRL	American Radio Relay League
344	ARSC	Arctic Region Supercomputing Center
345	ARSPACE	U.S. Army Space Command
346	ARTCC	Air Route Traffic Control Center
347	ARWG	Army Research Working Group
348	AS	ActionScript
349	AS	American Samoa (postal symbol; ISO 3166 digram),Assam / Asom (Indian state code)
350	As	Arsenic
351	aS	Attosiemens
352	ASA	AcetylSalicylic Acid,American Standards Association,Army Security Agency,Atlantic Southeast Airlines
353	ASAP	As Soon As Possible
354	ASARS	Advanced Synthetic Aperture Radar System,Airborne Search and Rescue System
355	asbl	association sans but lucratif (French 'Non-profit organisation')
356	ASBO	Anti-Social Behaviour Order
357	ASCAP	American Society of Composers,Authors,and Publishers
358	ASCC	Army Service Component Commander,Automatic Sequence Controlled Calculator,Air Standardization Coordinating Committee
359	ASCII	American Standard Code for Information Interchange
360	ASD	(U.S.) Assistant Secretary of Defense,autism spectrum disorder
361	ASDIC	Allied Submarine Detection Investigation Committee (Sonar)
362	ASEAN	Association of Southeast Asian Nations
363	ASFAR	Americans for a Society Free of Age Restrictions
364	ASG	Area Support Group
365	ASIC	Australian Securities and Investments Commission,Aviation Security Identification Card
366	ASICS	Anima sana in corpore sano (Latin for 'A sound mind in a sound body') (athletic shoe manufacturer)
367	ASIO	Australian Security Intelligence Organisation,Audio stream input output
368	ASIP	Advanced System Improvement Program,Army Stationing and Installation Plan,Application-specific instruction-set processor
369	ASL	Above Sea Level,American Sign Language (also known as Ameslan),'Age,Sex,Location?' (Internet slang)
370	ASM	Air-to-Surface Missile,American Samoa (ISO 3166 trigram),American Society for Metals,American Society for Microbiology
371	ASMB	American Society for Matrix Biology,Adult Swim Message Board
372	ASME	American Society of Mechanical Engineers,American Society of Magazine ors
373	ASMP	Air-Sol Moyenne Portée missile (French 'Medium-range air to surface'),Asymmetric multiprocessing
374	ASN	Associate of Science in Nursing
375	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
376	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
377	ASPI	Australian Strategic Policy Institute
378	ASR	Alkali-silica reaction,Anti Slip Regulation
379	ASRAAM	Advanced Short-Range Air-to-Air Missile
380	ASSC	Association for the Scientific Study of Consciousness
381	AST	Atlantic Standard Time (UTC−4 hours)
382	ASTIA	Armed Services Technical Information Agency
383	ASTM	American Society for Testing and Materials
384	ASTREA	Aerial Support To Regional Enforcement Agencies (sheriff's air support unit)
385	ASUW	AntiSUrface Warfare
386	ASVAB	Armed Services Vocational Aptitude Battery(taken by juniors in high school in the USA)
387	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)
388	ASW	AntiSubmarine Warfare
389	ASWORG	(U.S.) AntiSubmarine Warfare Operations Research Group
390	ASX	Advanced Stream Redirector,Australian Securities Exchange
391	AT	Anti-Tank,Austria (ISO 3166 digram),Advanced Technology (IBM Personal Computer/AT)
392	At	Astatine
393	aT	Attotesla
394	ATA	Advanced Technology Attachment (IBM Personal Computer),Afghan Transitional Authority,Allen Telescope Array,Antarctica (ISO 3166 trigram)
395	ATAC	Air Transportable Acoustic Communications
396	ATAPI	Advanced Technology Attachment Packet Interface
397	ATAT	Aiken Tactical Airsoft Team / Star Wars vehicle
398	ATB	Active Time Battle,British Antarctic Territory (ISO 3166 trigram; merged with AQ in 1979)
399	ATC	Air Training Corps, U.S. Air Transport Command (1942-1948), Athletic Trainer,Certified
400	ATESS	Aerospace and Telecommunications Engineering Support Squadron
401	ATF	French Southern Territories (ISO 3166 trigram),(U.S.) Bureau of Alcohol,Tobacco,Firearms and Explosives
402	ATG	Antigua and Barbuda (ISO 3166 and FIFA trigram)
403	ATGM	Anti-Tank Guided Missile
404	ATGW	Anti-Tank Guided Weapon
405	ATK	Attack
406	ATL	Atlanta,Georgia,the largest city and capital of Georgia
407	ATLAS	All-Terrain Lifter Army System,Assessment Tool for LAnd Systems
408	ATM	At The Moment
409	ATN	Dronning Maud Land (ISO 3166 trigram; merged with AQ in 1983)
410	ATO	Air Tasking Order,Australian Taxation Office
411	ATP	Adenosine TriPhosphate,Allied Tactical Publication,Ammunition Transfer Point
412	ATSD	(U.S.) Assistant Secretary of Defense
413	ATSDR	Agency for Toxic Substances and Disease Registry
414	ATV	All-Terrain Vehicle
415	ATWA	Air,Trees,Water,Animals
416	AU	African Union (was OAU before 2000),American University,Astronomical Unit,Australia (ISO 3166 digram)
417	Au	Gold (Latin 'Aurum')
418	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)
419	AUS	Australia (ISO 3166 trigram)
420	AUSCANNZUKUS	Australia,Canada,New Zealand,United Kingdom,United States (security designation)
421	Auslan	Australian Sign Language
422	AUT	Austria (ISO 3166 trigram)
423	AUTL	Army Universal Task List
424	AV	Audio-Visual,Aviation
425	Av	Aperture value (photographic mode)
426	aV	Attovolt
427	AVA	American Viticultural Area
428	AVB	Audio Video Bridging
429	AVDLR	Aviation Depot Level Repair
430	AVGP	Armoured Vehicle, General Purpose
431	AVIM	Aviation Intermediate Maintenance
432	AVLB	Armoured Vehicle Launched Body
433	AVM	Air Vice-Marshal, Arteriovenous malformation
434	AVO	Apprehended Violence Order
435	AVP	Arubaanse Volkspartij
436	AVP	Association of Volleyball Professionals
437	AVRE	Armoured Vehicle Royal Engineers
438	AVTB	Armoured Vehicle Test Bed,Aviation Test Bed
439	AVUM	Aviation Unit Maintenance
440	AVVO	Acute Vaginal Venereal Outbreak
441	AW	Aruba (ISO 3166 digram)
442	aW	Attowatt
443	AWA	American Wrestling Association
444	AWC	Air Warfare Centre
445	AWD	All Wheel Drive
446	AWE	Advanced Warfighting Experiment
447	AWP	Awaiting Parts (SM&R code)
448	AWSIM	Air Warfare SIMulation
449	AWST	Australian Western Standard Time
450	AWW	Above Water Warfare
451	AX	Åland Islands (ISO 3166 digram)
452	AXP	Ambulance eXchange Point
453	AYBABTU	All Your Base Are Belong To Us
454	AYU	As Yet Unknown
455	AZ	Arizona (postal symbol),Azerbaijan (ISO 3166 digram),Alkmaar Zaanstreek (Dutch football club)
456	AZE	Azerbaijan (ISO 3166 trigram)
457	AZUR	Actions en zone urbaine (French for: Urban Operations)
458	B2B	Business to Business
459	B2C	Business to Consumer
460	B2G	Business to Government
461	B2E	Business to Employee
462	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]
463	BB	Barbados (ISO 3166 digram),Boys' Brigade (Christian youth organization),Brigitte Bardot (actress),Bumblebee
464	BBB	Better Business Bureau,Blood-brain barrier
465	BBC	Breeding Bird Census,British Broadcasting Corporation,Bumper to Back of Cab (trucking measurement)
466	BBL	Be Back Later,Bird Banding Laboratory,British Basketball League
467	BBN	Bolt,Beranek and Newman
468	BBQ	Barbecue
469	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)
470	BBYO	B'nai B'rith Youth Organization
471	BC	Before Christ,Blind Copy (in emailers),Boston College,British Columbia (postal symbol)
472	BCA	Bachelor of Computer Application,Black Coaches & Administrators
473	BCC	Blind Carbon Copy
474	BCCI	Bank of Credit and Commerce International,Board of Control for Cricket in India,BCD , Binary-Coded Decimal
475	BEA	Banque extérieure d'Algérie,British European Airways (ancestor of British Airways),British Electricity Authority,bel
476	BEL	Belgium (ISO 3166 trigram)
477	BEN	Benin (ISO 3166 trigram)
478	BEO	Banquet Event Order
479	BERC	Business Environmental Resource Center
480	BER	Bit Error Rate
481	BH	Bahrain (ISO 3166 digram)
482	BHR	Bahrain (ISO 3166 trigram)
483	BNF	Backus-Naur Form (computing), British National Formulary
484	BNICE	Biological,Nuclear,Incendiary,Chemical,and Explosive Agents
485	BNP	British National Party,Banque Nationale de Paris,a predecessor to today's BNP Paribas
486	BNS	Bank of Nova Scotia
487	BNSF	Burlington Northern Santa Fe (also AAR reporting mark)
488	BO	Back Orifice,Biarritz Olympique (French rugby union club),Bolivia (ISO 3166 digram),Body odor
489	BOAC	British Overseas Airways Corporation (predecessor of British Airways)
490	BoAML	Bank of America Merrill Lynch
491	BOC	British Orthodontic Society, British Oxygen Company
492	BÖC	Blue Öyster Cult
493	BODMAS	Brackets,Orders,Division,Multiplication,Addition,Subtraction
494	BOFH	Bastard Operator From Hell
495	BOGA	Bend Over and Grab Ankles
496	BOGOF	Buy One,Get One Free
497	BOGs	Bunch of Guys
498	BOI	Balance Of Investment,Basis Of Issue
499	BOL	Bolivia (ISO 3166 trigram)
500	BOM	Base Object Model,Bill Of Materials,Block of the Month quilting term,Business opportunity meeting
501	BOPD	Barrel of Oil Per Day
502	BOS	Battlefield Operating System
503	BOT	Balance of Trade,Botswana (IOC and FIFA trigram,but not ISO 3166),Build Operate Transfer,Bank of Thailand,BP[edit]
504	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
505	BPV	Battlefield Planning Visualization,Bovine papillomavirus
506	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)
507	BR	Brazil (ISO 3166 digram) ,Bihar (Indian state code),British Rail,Break Ranks (marching band term)
508	BRA	Brazil (ISO 3166 trigram)
509	BRAG	Bicycle Ride Across Georgia
510	BRASS	Breathe,Relax,Aim,Sight,Squeeze (acronym for using a rifle)
511	BRIC	Brazil, Russia, India, and China
512	BRICS	Brazil, Russia, India, China, and South Africa
513	BSA	Birmingham Small Arms (motorcycles company),Boy Scouts of America,Brigade Support Area
514	BSatCoP	Benjamin Sniddlegrass and the Cauldron of Penguins
515	BSE	Bovine Spongiform Encephalopathy (better known as mad cow disease)
516	BSN	Baloncesto Superior Nacional (Spanish,'National Superior Basketball'; top Puerto Rican league),Bank Simpanan Nasional (Malay,'National Savings Bank'; government-owned Malaysian bank)
517	BSNL	Bharat Sanchar Nigam Limited,Bachelor of Science in Nursing
518	BSoD	Blue Screen of Death (distinct from BSD)
519	BSP	Between-Show Promotion,Binary Space Partitioning,Board Support Package,British Standard Pipe (screw thread),Business-sponsored,Bone sialoprotein
520	BST	Binary search tree,Blended Sales Tax,Bovine somatotropin,British Summer Time
521	BSW	British Standard Whitworth (screw thread)
522	BSX	Bendigo Stock Exchange
523	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
524	Bt	Baronet,Bacillus thuringiensis
525	BTO	Built To Order
526	BTP	British Transport Police
527	BTR	Bronetransporter (БТР = Бронетранспортер '(Heavy) Armoured (Personnel) Transporter')
528	BTU	British Thermal Unit
529	BTW	By The Way
530	BU	Burma (ISO 3166 digram; obsolete since 1989)
531	BUAV	British Union for the Abolition of Vivisection
532	BUG-E	Battlefield Universal Gateway Equipment ('buggy')
533	BUNO	Bureau Number (aircraft serial number)
534	BUR	Burma (ISO 3166 trigram; obsolete since 1989)
535	BV	Background Vocals -,Battlefield Visualization ,,Bouvet Island (ISO 3166 digram)
536	BVD	Bradley,Voorhees & Day (underwear manufacturer)
537	BVR	Beyond Visual Range
538	BVT	Bouvet Island (ISO 3166 trigram)
539	B&W	Babcock & Wilcox, Black and White, Bowers & Wilkins
540	BW	Bring Wedges (ISO digram)
541	BW	Botswana (ISO 3166 digram)
542	BWA	Botswana (ISO 3166 trigram)
543	BWARS	Bees,Wasps & Ants Recording Society
544	BWC	Biological and Toxin Weapons Convention
545	BWR	Boiling-Water Reactor
546	BX	Base eXchange
547	BY	Belarus (ISO 3166 digram), Bavaria
548	BYOB	Bring Your Own Bottle (or beer, beverage, or booze) (multiple,but similar,meanings)
549	BYOC	Bring Your Own Computer (play on BYOB)
550	BYOF	Bring Your Own Flask
551	BYS	Byelorussian Soviet Socialist Republic (ISO 3166 trigram; obsolete since 1992)
552	BYU	Brigham Young University
553	BZ	Belize (ISO 3166 digram)
554	BZP	Benzylpiperazine
555	C	Carbon, Coulomb, One Hundred (in Roman numerals)
556	c	Centi
557	C2C	Consumer-To-Consumer electronic commerce, Cam-To-Cam internet chat
558	c2c	the British rail company formerly known as LTS Rail
559	Ca	Calcium
560	CA	California (postal symbol),Canada (ISO 3166 digram),Catalonia,Civil Affairs,Close Armour,Cocaine Anonymous,Computer Associates,Counter-Air,Cricket Australia
561	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
562	CAAT	Campaign Against Arms Trade,Center for Alternatives to Animal Testing
563	CAC	California Association of Criminalists,Chronic Asymptomatic [Disease] Carrier
564	CACM	Central American Common Market
565	CACM	Communications of the ACM
566	CADCAM	Computer-Aided Design/Computer-Aided Manufacturing
567	CADMID	Concept,Assessment,Demonstration,Manufacture,In service,Disposal (life cycle mnemonic)
568	CADPAT	CAnadian Disruptive PATtern
569	CAE	Canadian Aviation Electronics (originally),Certificate in Advanced English
570	CAEn	Close Action Engagement (constructive simulation)
571	CAF	Central African Republic (ISO 3166 trigram),Confederation of African Football (or French Confédération Africaine de Football)
572	CAFAD	Combined Arms For Air Defence
573	CAFDE	Canadian Association of Film Distributors and Exporters,Computer Aided Federation Development Environment
574	CAFE	Corporate Average Fuel Economy standard
575	CAI	Computer Assisted Instruction
576	CAIR	Council on American-Islamic Relations
577	CALABARZON	A region in the Philippines: CAvite,LAguna,BAtangas,Rizal,queZON
578	CALL	Center for Army Lessons Learned
579	CALM	Communications,Air-interface,Long and Medium range
580	CalPERS	California Public Employees' Retirement System
581	Caltrans	California Department of Transpotation
582	CAM	Chemical Agent Monitor,Complementary and alternative medicine,Computer-Aided Manufacturing,Crassulacean acid metabolism (type of photosynthesis)
583	CAMRA	CAMpaign for Real Ale
584	CAN	Canada (ISO 3166 trigram)
585	CANDU	CANada Deuterium Uranium (nuclear reactor design)
586	Canola	Canadian oil,low acid (referring to a specific cultivar of rapeseed bred to have a low erucic acid content)
587	CAPES	CAPability Evaluation System,Combined Arms Planning and Execution System
588	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)
589	CARMONETTE	Computerized Monte Carlo Simulation
590	CARP	Computed Air Release Point
591	CART	Championship Auto Racing Teams (now defunct)
592	CAS	Chemical Abstracts Service,Chief of the Air Staff,Close Air Support
593	CASA	Civil Aviation Safety Authority
594	CASE	Cellular ammunition storage equipment,Computer-Aided Software Engineering
595	CASS	Command Activated Sonobuoy System
596	CASTFOREM	Combined Arms and Support Task FORce Evaluation Model
597	CASTOR	Canadian Automatic Small Telescopes for Orbital Research
598	CAT	Community Acceptance Testing
599	CATK	Counterattack
600	CATS	Computer Active Technology Suspension
601	CATT	Combined Arms Tactical Trainer
602	CAV	Cavalry
603	CAVOK	Ceiling And Visibility OK ('Kav-okay')
604	CAW	Canadian Auto Workers (trade union)
605	CB	Citizens' Band radio
606	CBASSE	Commission on Behavioral And Social Sciences and Education ('sea bass')
607	CBC	Canadian Broadcasting Corporation,Christmas Bird Count,Cipher-Block Chaining,Cornering Brake Control
608	CBE	Commander of the Order of the British Empire,Cab Beside Engine (see truck)
609	CBF	Confederação Brasileira de Futebol (Portuguese,'Brazilian Football Confederation')
610	CBGB	Country,Blue Grass,and Blues (former New York City nightclub)
611	CBLA	Comparative bullet lead analysis
612	CBM	Canadian Baptist Ministries
613	CBM	Commodore Business Machines
614	CBML	Coalition Battle Management Language
615	CBN	CardsApp Brand Number
616	CBOL	Consortium for the Barcode of Life
617	CBOT	Chicago Board of Trade
618	CBP	Customs and Border Protection
619	CBR	Case-Based Reasoning
620	CBRN	Chemical,Biological,Radiological,or Nuclear (weapon or event)
621	CBRNE	Chemical,Biological,Radiological,Nuclear or [high-yield] Explosive (weapon or event)
622	CBS	Columbia Broadcasting System,Corps Battle Simulation
623	CBUS	Columbus,Ohio
624	CC	carbon copy
625	CCA	Counter Command Activity
626	CCC	Canterbury Clothing Company,Civilian Conservation Corps (U.S.,1930s and 1940s),Corpus Christi College,Oxford
627	CCCP	Central Committee of the Communist Party,Cyrillic for SSSR (Soyuz Sovetskikh Sotsialisticheskikh Respublik,Russian Союз Советских Социалистических Республик,Union of Soviet Socialist Republics)
628	CCD	Confraternity of Christian Doctrine (Catechism)
629	CCF	Cartoon Cartoon Fridays
630	CCG	Canadian Coast Guard,Collectible Card Game
631	CCGC	Canadian Coast Guard Cutter,Canadian Coast Guard College
632	CCGH	Canadian Coast Guard Hovercraft
633	CCGS	Canadian Coast Guard Ship,Christ Church Grammar School
634	CCH	Computer-Controlled Hostile
635	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)
636	CCII	Command and Control Information Infrastructure,Community Capital Investment Initiative
637	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
638	CCIT	Comité consultatif international télégraphique (French for International Telegraph Consultative Committee,merged with the CCIF in 1956 to form the CCITT)
639	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)
640	CCK	Cholecystokinin,Cocos (Keeling) Islands (ISO 3166 trigram)
641	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
642	CCOC	Canadian Children's Opera Chorus,Crosley Car Owners Club
643	CCOP	Coalition Common Operating/Operational Picture
644	CCP	Casualty Collection Point,Communications Checkpoint,Contingency Communications Package
645	CCPA	Consumer Credit Protection Act
646	CCR	Creedence Clearwater Revival
647	CCRAp	Canadian Conservative Reform Alliance party
648	CCRP	Command and Control Research Program
649	CCRTS	Command and Control Research and Technology Symposium
650	CCSCS	Consultative Committee for Space Data Systems
651	CCSCS	Coordinadora de Centrales Sindicales del Cono Sur
652	CCSIL	Command and Control Simulation Interface Language ('cecil')
653	CCSK	Cyclic Code Shift Keying
654	CCT	Current Commitments Team
655	Cd	Cadmium
656	cd	Candela
657	CD	Compact Disc
658	CD1	Cluster of Differentiation 1 (a small gene family)
659	CDA	UK Centre for Defence Analysis
660	CDD	Capabilities Development Document
661	CDE	Chemical Defence Equipment
662	CDIAC	Carbon Dioxide Information Analysis Center ('see-dee-ack')
663	CDipAF	Certified Diploma in Accounting and Finance
664	CDL	Commercial driver's license
665	CDM	Clean Development Mechanism (Kyoto protocol), Cold Dark Matter (astronomy)
666	CDMA	Code Division Multiple Access
667	CDMSII	Cryogenic Dark Matter Search II
668	Cdr	Commander
669	CDT	Central Daylight Time (UTC−5 hours)
670	Cdt	Commandant
671	Ce	Cerium
672	CE	Christian/Common Era
673	CEA	Campaign Effectiveness Analysis
674	CECOM	U.S. Army Communications and Electronics Command
675	CEDEX	Courrier d'entreprise à distribution exceptionnelle (French,'Company Mail with Exceptional Distribution'; 'exceptional' refers to the volume of mail)
676	CEGEP	Collège d'enseignement général et professionnel (French,'College of General and Vocational Education')
677	CEI	Competitive Enterprise Institute
678	CENTCOM	United States Central Command
679	CENTO	Central Treaty Organization (Baghdad Pact)
680	CENZUB	Centre d'entraînement aux actions en zone urbaine (French,'Urban Operations Training Centre')
681	CEO	Chief Executive Officer
682	CEP	Circular Error Probable
683	CEPT	Conférence européenne des administrations des postes et des télécommunications (French,'European Conference of Postal and Telecommunications Administrations')
684	CERCLA	U.S. Comprehensive Environmental Response,Compensation,and Liability Act (Superfund)
685	CERDEC	U.S. Communications-Electronics Research,Development and Engineering Center
686	CERGA	Centre de recherches en géodynamique et astrométrie (French,'Astrometry and Geodynamics Research Centre')
687	CERN	Centre européen pour la recherche nucléaire (French,'European Organization for Nuclear Research')
688	CERT	Computer Emergency Response Team
689	CESS	Centre for Earth Science Studies (India)
690	CEST	Central European Summer Time
691	CET	Central European Time
692	CEWC	Council for Education in World Citizenship
693	Cf	Californium
694	CF	Canadian Forces,Central African Republic (ISO 3166 digram)
695	CFA	Cat Fanciers' Association,Chartered Financial Analyst,Colour Filtering Array,County Fire Authority,Covering Force Area
696	CFAR	Christine's,Federal Acquisition Regulation
697	CFC	ChloroFluoroCarbon,Canadian Fish Company
698	CFES	Continuous Flow Electrophoresis System
699	CFFZ	Call For Fire Zone
700	CFG	Context-free grammar,Control flow graph
701	CFHT	Canada-France-Hawaii Telescope
702	CFI	Center for Inquiry (CSICOP)
703	CFL	Canadian Football League,Co-ordinated Fire Line
704	CFLCC	Coalition Forces Land Component Command
705	CFM	Certified Facilities Manager
706	CFO	Chief Financial Officer
707	CFP	Call for papers, College Football Playoff, Common Fisheries Policy (EU)
708	CFR	Code of Federal Regulations,Căile Ferate Române (Romanian,'Romanian Railways')
709	CFRP	Carbon fibre reinforced plastic
710	CFS	Chronic Fatigue Syndrome
711	CFSP	Common Foreign and Security Policy
712	CFU	Colony Forming Unit in Microbiology
713	CFV	Cavalry Fighting Vehicle
714	CFZ	Critical Friendly Zone
715	CG	Client Group,Computer Graphics,Controls Group,Republic of the Congo (ISO 3166 digram)
716	CGH	Comparative Genomic Hybridisation
717	CGIG	Cross-Government Implementation Group
718	CGO	Republic of the Congo (IOC and FIFA trigram,but not ISO 3166)
719	CGS	Chief of the General Staff
720	CGT	Capital Gains Tax
721	ch	ch(L) is used to denote the Chern character of a line bundle
722	CH	Chieftain tank,Switzerland (ISO 3166 digram; from Latin Confoederatio Helvetica)
723	CHAMPUS	(U.S.) Civilian Health and Medical Program of the Uniformed Services (now known as TRICARE)
724	CHAOS	Cambridge Heart Anti-Oxidant Study
725	CHAPS	Clearing House Automated Payment System
726	CHDK	Canon Hack Development Kit (Canon camera firmware hack)
727	CHE	Switzerland (ISO 3166 trigram; from Latin Confoederatio Helvetica)
728	CHI	Columbia Helicopters,Inc
729	CHiP	California Highway Patrol
730	CHIPS	Cosmic Hot Interstellar Plasma Spectrometer
731	CHL	Chile (ISO 3166 trigram)
732	CHLA	Core Historical Literature of Agriculture
733	CHN	China (ISO 3166 trigram)
734	CHOGM	Commonwealth Heads of Government Meeting
735	CHPSO	California Hospital Patient Safety Organization
736	CHRS	Canadian Heart Rhythm Society
737	CHT	Certified Hand Therapist
738	CI	Côte d'Ivoire (ISO 3166 digram),Counter-Intelligence,101 (in Roman numerals)
739	Ci	Curie
740	CIA	Cairo International Airport, Culinary Institute of America
741	CIAO	Critical Infrastructure Assurance Office,Component-Integrated ACE ORB
742	CIB	Complete In Box (Internet auction/trading listings)
743	CIBC	Canadian Imperial Bank of Commerce
744	CICS	Customer Information Control System (IBM mainframe software; 'kicks' or 'C-I-C-S')
745	CID	Certified Interior Designer
746	CIEF	Comité international d'enregistrement des fréquences (International Frequency Registration Board)
747	CIF	Cost,Insurance,and Freight (Paid) (shipping)
748	CIMMYT	Centro Internacional de Mejoramiento de Maíz Y Trigo (Spanish,'International Maize and Wheat Improvement Center')
749	CINC	Commander in Chief
750	CINEOS	Campo Imperatore Near-Earth Object Survey
751	CIO	Chief information officer,Congress of Industrial Organizations
752	CIPE	(European) Centre for International Political Economy
753	CIR	(Commander's) Critical Information Requirements
754	CIR	Corotating Interaction Region
755	CIS	Canadian Interuniversity Sport,Commonwealth of Independent States,Command and Information System,Communication and Information System
756	CISA	(U.S.) C4I Integration Support Activity
757	CISB	Complete In Sealed Box (Internet auction/trading listings)
758	CISPR	Comité international spécial des perturbations radioélectriques (Special International Committee on Radio Interference)
759	CISSP	Certified Information Systems Security Professional
760	CITES	Convention on International Trade in Endangered Species (of Wild Fauna and Flora) ('sigh-tease')
761	CIV	Côte d'Ivoire (ISO 3166 trigram)
762	CIVETS	Colombia,Indonesia,Vietnam,Egypt,Turkey,South Africa (economics)
763	CIVPOP	Civilian Population
764	CIWS	Close-In Weapon System
765	CJ	Criminal Justice
766	CJC	Canadian Jewish Congress,Cold Junction Compensation
767	CJCS	Chairman of the Joint Chiefs of Staff
768	CJD	Chronological Julian Day,Creutzfeldt-Jakob Disease
769	CJO	Chief of Joint Operations
770	CJTF	Combined Joint Task Force
771	CK	Cook Islands (ISO 3166 digram)
772	CKA	commonly known as, Canada Kicks Ass
773	CKND	Codename: Kids Next Door
774	CL	Chile (ISO 3166 digram),Co-ordination Line,One Hundred and Fifty (in Roman numerals)
775	Cl	Chlorine
776	CLA	Clutterers Anonymous
777	CLEC	Competitive Local Exchange Carrier
778	CLEMARS	California Law Enforcement Mutual Aid Radio System
779	CLIC	Compact LInear Collider
780	CLO	Cornell Lab of Ornithology
781	CLOS	Command to Line-Of-Sight (missile control system)
782	CLPFC	CentroLateral PreFrontal Cortex
783	CLRP	College Loan Repayment Program
784	CM	Cameroon (ISO 3166 digram),Cruise Missile,Nine Hundred (in Roman numerals)
785	Cm	Curium
786	CMA	U.S. Chemical Materials Agency,Country Music Association (also used to refer to the organization's annual awards),Crystal Meth Anonymous
787	CMHC	Canada Mortgage and Housing Corporation
788	CMIIAW	Correct me if I am wrong
789	CMIS	Common management information service
790	CMJ	Christopher Martin-Jenkins (BBC sports commentator)
791	CMLL	Consejo Mundial de Lucha Libre (Spanish,'Worldwide Wrestling Council'—Mexican professional wrestling promotion)
792	CMMC	Corps Materiel Management Centre
793	CMML	Chronic MyeloMonocytic Leukemia,Continuous Media Markup Language
794	CMOS	Canadian Meteorological and Oceanographic Society,(The) Chicago Manual of Style,Complementary Metal Oxide Semiconductor
795	CMP	Common [Operating/Operational] Maritime Picture
796	CMPD	Charlotte Mecklenburg Police Department
797	CMPD	Chronic Myeloproliferative Disease
798	CMR	Cameroon (ISO 3166 trigram),Coaxial Main Rotors (helicopter type)
799	CMS	Centers for Medicare and Medicaid Services,The Chicago Manual of Style
800	CMT	Country Music Television
801	CMU	Carnegie Mellon University,Central Michigan University,Concrete Masonry Unit
802	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)
803	CMYK	Cyan Magenta Yellow Key/blacK (colour model)
804	CN	Canadian National (railway; also the AAR reporting mark for said company),China (ISO 3166 digram)
805	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
806	CNBC	Consumer News and Business Channel
807	CND	Campaign for Nuclear Disarmament,Computer Network Defence
808	CNE	Canadian National Exhibition,Computer Network Exploitation,Certified Network Engineer
809	CNF	Cost and Freight
810	CNI	Clinical Nursing Intern
811	CNI	Communications,Navigation and Identification
812	CNN	Cable News Network,Cellular Nonlinear Network
813	CNV	Copy-Number Variable (genetics)
814	Co	Cobalt
815	COB	Close Of Business [day]
816	COBRA	Consolidated Omnibus Budget Reconciliation Act of 1985
817	COD	Cash On Delivery,Democratic Republic of the Congo (ISO 3166 trigram)
818	CoDA	Co-Dependents Anonymous
819	COGENT	Cognitive Objects within a Graphical EnviroNmenT
820	COIL	Chemical Oxygen Iodine Laser
821	COK	Cook Islands (ISO 3166 trigram)
822	COL	Colombia (ISO 3166 trigram)
823	COLA	Cost Of Living Adjustment
824	CONAD	U.S. Continental Air Defense Command
825	CONMEBOL	Confederación Sudamericana de Fútbol or Confederação Sul-Americana de Futebol (respectively Spanish and Portuguese for 'South American Football Confederation')
826	CONUS	Continental United States
827	COO	Chief Operating Officer
828	COPE	U.K. Committee On Publication Ethics
829	COPUS	U.K. Committee on the Public Understanding of Science
830	CORD	Common Operational Requirements Document
831	CORE	Consortium for Oceanographic Research and Education
832	COS	Cooper Ornithological Society
833	COSER	COoperative SERvice
834	CoT	Car of Tomorrow (former NASCAR race car design)
835	COTS	Commercial Off The Shelf
836	CP	Canadian Pacific,Check Point,Command Post,Club Penguin
837	CPA	Certified Public Accountant
838	CPAC	Conservative Political Action Conference,Cable Public Affairs Channel ('see-pack')
839	CPCU	Certified Property Casualty Underwriter
840	CPD	Capabilities Production Document
841	CPE	Certificate of Proficiency in English
842	CPE	Certified Professional Ergonomist
843	CPF	Calibration Parameter File,Canadian Patrol Frigate
844	CPG	Clinical Practice Guideline
845	CPIM	Certification on Production and Inventory Management
846	CPIR	Computationally-Private Information Retrieval
847	CPON	Certified Pediatric Oncology Nurse
848	CPPCC	Chinese People's Political Consultative Conference
849	CPR	Canadian Pacific Railway
850	CPR	Cardiopulmonary resuscitation
851	CPSM	Continuous Phase Shift Modulation
852	CPSU	Communist Party of the Soviet Union
853	CPT	Contingency Planning Team
854	CPU	Contract Postal Unit
855	CPV	Cape Verde (ISO 3166 trigram)
856	CPX	Command Post eXercise
857	CQ	Carrier Qualification,Central Queensland,Charge of Quarters,Congressional Quarterly,Constellation Airlines (IATA airline designator)
858	CQD	Close Quarters Drill (Morse distress code preceding SOS: CQ 'calling all stations',D 'Distress'; often incorrectly interpreted as 'Come Quick,Distress')
859	Cr	Chromium
860	CR	Costa Rica (ISO 3166 digram)
861	CRAM	Combined Radiometric Correction Model
862	CRD	Capstone Requirements Document
863	CREB	Cyclic AMP-response Element Binding (protein)
864	CREEP	Committee for the Re-Election of the President,a pejorative nickname used by opponents
865	CREN	Christian Real Estate Network Real Estate Association
866	CRI	China Radio International,Costa Rica (ISO 3166 trigram)
867	CRIPL	Consolidated Remain-In-Place List
868	CRM	Cardiac Rhythm Management,Customer Relationship Management
869	CRO	Croatia (IOC and FIFA trigram,but not ISO 3166)
870	CRP	Committee for the Re-Election of the President,Control and Reporting Post
871	CRT	Cardiac Resynchronization Therapy,Cathode Ray Tube,Chinese Remainder Theorem
872	CRTC	Canadian Radio-television and Telecommunications Commission
873	Cs	Caesium
874	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
875	CSAM	Child Sexual Abuse Material
876	CSC	Closed Spacelike Curve (relativity),Compact system camera,Computer Sciences Corporation,Computer Security Centre,CSCC Canadian Society of Clinical Chemists
877	CSERIAC	(U.S. DoD) Crew Systems Ergonomics Information Analysis Center
878	CSG	Corps Support Group
879	CSI	see entry
880	CSICOP	Committee for the Scientific Investigation of Claims of the Paranormal (became the Committee for Skeptical Inquiry in 2006)
881	CSIP	Commercial Stable Image Platform (AMD)
882	CSIS	Canadian Security Intelligence Service ('seessiss'),(U.S.) Center for Strategic & International Studies
883	CSK	Czechoslovakia (ISO 3166 trigram; obsolete since 1993)
884	CSL	U.K. Central Science Laboratory
885	CSPI	Center for Science in the Public Interest
886	CSR	Control Supply Rate
887	CSR	Corporate Social Responsibility
888	CSRC	Conflict Studies Research Centre
889	CSRF	Cross-Site Request Forgery
890	CST	Central Standard Time (UTC−6 hours)
891	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)
892	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')
893	CTBT	Comprehensive [Nuclear] Test Ban Treaty
894	CTDB	Compact Terrain Data Base (file format)
895	CTE	Canton and Enderbury Islands (ISO 3166 trigram; obsolete 1984),Chronic traumatic encephalopathy
896	CTGF	connective tissue growth factor
897	CTI	Co-operative Target Identification
898	CTIL	Critical Tracked Items List
899	CTIS	Central Tire Inflation System
900	CTMS	Clinical Trial Management System
901	CTO	Chief Technical Officer,Chief Technology Officer
902	CTS	Clear-To-Send,Collective Training Standards,Communications Technology Service,Contract Technical Services,Conversation Time Sharing,COSMIC Top Secret
903	CTSS	Compatible Time-Sharing System
904	CTU	Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24)
905	CTVT	Canine Transmissible Venereal Tumour
906	CU	Carrie Underwood, Cuba (ISO 3166 digram)
907	Cu	Copper (Latin 'Cuprum')
908	CUB	Cuba (ISO 3166 trigram)
909	CUCV	Commercial Utility Cargo Vehicle
910	CUNY	City University of New York ('CUE-knee')
911	CUPE	Canadian Union of Public Employees ('CUE-pee')
912	CUPS	Common Unix Printing System
913	CUPW	Canadian Union of Postal Workers
914	CUREA	Consortium for Undergraduate Research and Education in Astronomy
915	CuW	Copper-tungsten pseudo-alloy (from the chemical symbols of the two component elements)
916	CUW	Curaçao (ISO 3166 trigram)
917	CV	curriculum vitae (résumé)
918	CVLL	Crypto Variable Logic Label
919	CVSD	Continuous Variable Slope Delta (modulation)
920	CVT	Continuously Variable Transmission
921	CW	Calendar Week, or: Continuous Wave, or: Clothes Washer
922	CWA	Communications Workers of America
923	CWC	Chemical Weapons Convention
924	CWRU	Case Western Reserve University
925	CWS	Canadian Wildlife Service
926	CX	Christmas Island (ISO 3166 digram),or: One Hundred and Ten (in Roman numerals)
927	CXR	Christmas Island (ISO 3166 trigram)
928	CY	Calendar year, or: Cyprus (ISO 3166 country code digram)
929	CYM	Cayman Islands (ISO 3166 trigram)
930	CZE	Czech Republic (ISO 3166 trigram)
931	CZF	(Christian Zombie Fan)
932	CZMA	(US) Coastal Zone Management Act
933	d	Deci
934	D	Deuterium
935	DA	Debtors Anonymous,U.S. Department of the Army,District Attorney
936	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')
937	DAES	Defence Acquisition Executive Summary,(UK MoD) Directorate of Analysis,Experimentation and Simulation
938	DAF	Dissolved Air Flotation,a technique used in water treatment
939	DAFIF	Digital Aeronautical Flight Information File
940	DAK	Disney's Animal Kingdom
941	DAO	Division Ammunition Officer
942	DAQ	Data acquisition,Delivered Audio Quality
943	DARE	Drug Abuse Resistance Education
944	DARO	(U.S.) Defense Airborne Reconnaissance Office
945	DARPA	U.S. Defense Advanced Research Projects Agency
946	DART	Disaster Assistance Response Team,Dublin Area Rapid Transit
947	DAS	Defensive Aids Suite
948	DASD	(U.S.) Deputy Assistant Secretary of Defense
949	DASL	Datapoint's Advanced Systems Language
950	DAU	(U.S.) Defense Acquisition University
951	DAWN	(U.S.) Drug Abuse Warning Network
952	dB	Decibel
953	DB	Deutsche Bahn
954	Db	Dubnium
955	DBA	De Bellis Antiquitatis (miniature wargaming rules)
956	DBBL	(U.S. Army Simulation Center) Dismounted Battlespace Battle Laboratory
957	DBDO	Desert BDO
958	DBE	Dame Commander of the Order of the British Empire
959	DBF	Detection By Fire (weapon launch signature)
960	DBR	De Bellis Renationis (miniature wargaming rules)
961	DBRA	Davis-Bacon Related Acts
962	DBS	Direct Broadcast Services (television)
963	DC	da capo,Italian Democrazia Cristiana,Digital Compass,Direct Current,District of Columbia (postal symbol),Douglas Aircraft Company,Dublin Core,Duty Cycle
964	DCA	Defensive Counter Air,Drum Corps Associates,DiChloroAcetate
965	DCAA	(U.S.) Defense Contract Audit Agency
966	DCAS	Devon and Cornwall Archery Society
967	DCC	Dallas Christian College
968	DCD	[Organ] Donation after Cardiac Death
969	DCE	Data Communication Equipment
970	DCFC	Death Cab for Cutie
971	DCI	Detection,Classification and Identification,Drum Corps International,Duellists' Convocation International,now known simply by the initials
972	DCL	Disney Cruise Line
973	DCN	Deacon
974	DCOM	Disney Channel Original Movie
975	DCSOPS	Deputy Chief of Staff for Operations and plans
976	DCW	Digital Chart of the World
977	DCYSC	Discovery Channel Young Scientist Challenge
978	DD	due diligence and dear daughter (increasingly prevalent on social mailing lists,blogs,and bulletin boards)
979	DDA	Deputy District Attorney
980	DDN	U.S. Defense Data Network
981	DDS	Doctor of Dental Surgery
982	DDT	Dichloro-Diphenyl-Trichloroethane (insecticide),Dynamic Debugging Tool (computing),DE[edit]
983	DE	Delaware (postal symbol),Germany (ISO 3166 digram)
984	DEA	Drug Enforcement Administration
985	DEA	Drug Enforcement Agency
986	DEC	Department of Environmental Conservation,Digital Equipment Corporation,Disasters Emergency Committee
987	DeCA	(U.S.) Defense Commissary Agency
988	DEFCON	Defence readiness condition
989	DEFRA	(UK) Department for Environment,Food and Rural Affairs
990	DELT	Dual Ended Line Test (ing)
991	DEM	Data Exchange Mechanism,Digital Elevation Model
992	DEN	Denmark (IOC and FIFA trigram,but not ISO 3166)
993	DEPSECDEF	(U.S.) Deputy Secretary of Defense
994	DERA	British Defence Evaluation and Research Agency (1995-2001)
995	DES	Deep Ecliptic Survey
996	DEU	Germany (ISO 3166 trigram)
997	DF	Direct Fire,Direction Finding,Distrito Federal (Spanish and Portuguese for 'federal district')
998	DFAS	(U.S.) Defense Finance and Accounting Service
999	DFB	Deutscher Fußball-Bund (German for 'German Football Association')
1000	DFCB	Data Format Control Book
1001	DfID	UK Department for International Development
1002	DFM	Discrete Field Model see Superluminal motion
1003	DFM	Dynamic Flowgraph Methodology
1004	DFSP	Dermatofibrosarcoma protuberans
1005	DfT	UK Department for Transport
1006	DFTBA	Don't Forget To Be Awesome,a term commonly used by the Vlogbrothers
1007	DG	Dei gratia (Latin,'by the grace of God'),Director-General,Data General
1008	DGA	Direction générale des armées (French 'Armed Forces General Directorate')
1009	DGPS	Differential GPS
1010	DGZ	Desired Ground Zero
1011	DHA	DocosaHexaenoic Acid
1012	DHHS	(U.S.) Department of Health and Human Services
1013	DHRA	(U.S.) DoD Human Resources Activity
1014	DHS	U.S. Department of Homeland Security
1015	DHSS	UK Department of Health and Social Security
1016	DHTFYSS	U.S. Don't Have Time For You Silly S****
1017	DHY	Dahomey (ISO 3166 trigram; became BEN for Benin in 1977)
1018	DIA	U.S. Defense Intelligence Agency
1019	DIAC	Department of Immigration and Citizenship (Australia) [1]
1020	DiC	Design Island Centre (computing usually used in a teaching situation)
1021	DICASS	DIrectional Command Activated Sonobuoy System
1022	DIFAR	DIrectional Frequency Analysis and Recording
1023	DIME	Dense Inert Metal Explosive
1024	DIP	Dual In-line Package (electronics)
1025	DIPS	Defense independent pitching statistics
1026	DIR	Defence Industrial Research
1027	DISCOM	Division Support Command
1028	DISE	Deployable Intelligence Support Element
1029	DISSTAF	DIS Search and Target Acquisition Fidelity experiment
1030	DITY	Do-It-Yourself
1031	DIVAD	Division Air Defence
1032	DIY	Do It Yourself
1033	DJI	Djibouti (ISO 3166 trigram)
1034	DK	Denmark (ISO 3166 digram)
1035	DL	Dexter's Laboratory
1036	DLIC	Detachment Left-In-Contact
1037	DLIR	Depot-Level Inspection and Repair
1038	DLPMC	DorsoLateral PreMotor Cortex
1039	DLRP	Data Link Reference Point
1040	DLS	Deep Lens Survey
1041	DLSA	(U.S.) Defense Legal Services Agency
1042	DLSc	Diploma in Library Science
1043	DLTBGYD	Don't let the bastards grind you down
1044	DMC	(U.S.) Defense Management Council
1045	DMCA	Digital Millennium Copyright Act
1046	DMM	Digital Multimeter
1047	DMOC	Distributed Mission Operations Centre
1048	DMPA	(U.S.) Defense Medical Programs Activity
1049	DMPFC	DorsoMedial PreFrontal Cortex
1050	DMPK	Drug Metabolism and Pharmacokinetics
1051	DMRB	Design Manual for Roads and Bridges
1052	DMS	U.S. Defense Message System
1053	DMSP	U.S. Defense Meteorological Satellite Program
1054	DMT	Dimethyltryptamine
1055	DMV	Department of Motor Vehicles
1056	DMZ	DeMilitarized Zone
1057	DN	Deacon
1058	DNAW	Day Night All Weather
1059	DNDi	Drugs for Neglected Diseases initiative
1060	DNDO	U.S. Domestic Nuclear Detection Office
1061	DNK	Denmark (ISO 3166 trigram)
1062	DNM	Defence Nuclear Material
1063	DNR	Do Not Resuscitate
1064	DNS	Domain Name System
1065	DO	Dominican Republic (ISO 3166 digram),Doctor of Osteopathic Medicine
1066	DOA	Dead On Arrival,Dead or Alive
1067	DOB	Date Of Birth
1068	DOD	U.S. Department of Defense
1069	DODAF	U.S. Department of Defense Architectural Framework
1070	DoDD	U.S. Department of Defense Directive
1071	DoDEA	(U.S.) Department of Defense Education Activity
1072	DOE	U.S. Department of Energy
1073	DOHC	Dual-OverHead-Cam engine
1074	DOI	U.S. Department of the Interior
1075	DORA	Defence of the Realm Act
1076	DOS	Density of State
1077	DOTA	short-form for DEFENSE OF THE ANCIENTS a popular online epic game
1078	DotD	Deal of the Day (marketing gimmick)
1079	DOW	Died of Wounds
1080	DP	Division de production (Algerian petroleum company)
1081	DPA	UK Defence Procurement Agency
1082	DPCO	Double-Pole Change Over
1083	DPDT	Double-Pole Double-Throw
1084	DPI	Dots Per Inch
1085	DPICM	Dual-Purpose Improved Conventional Munition
1086	DPKO	UN Department for Peacekeeping Operations
1087	DPMO	(U.S.) Defense Prisoner of War/Missing Personnel Office
1088	DPPDB	Digital Point Positioning Database
1089	DPRK	Democratic People's Republic of Korea
1090	DPST	Double-Pole Single-Throw
1091	DQ	Dairy Queen
1092	DR	Dead Reckoning,Danmarks Radio (Danish Broadcasting Corporation)
1093	DRC	Democratic Republic of the Congo
1094	DRDC	Defence Research & Development Canada
1095	DREA	Defence Research Establishment Atlantic (obsolete 2002)
1096	DRES	Defence Research Establishment Suffield (obsolete 2002)
1097	DRET	Defence Research Establishment Toronto (obsolete 2002)
1098	DREV	Defence Research Establishment Valcartier (obsolete 2002)
1099	DRIC	(U.S.) Defense Research Information Center
1100	DRMS	(U.S.) Defense Revitalization and Marketing Service
1101	DRPR	Drawing Practices
1102	DRT	Document Related Technologies
1103	Ds	Darmstadtium
1104	DSAS	Disney Sing Along Songs
1105	DSB	(U.S.) Defense Science Board
1106	DSCS	U.S. Defense Satellite Communications System
1107	DSCSOC	DSCS Operations Center
1108	DSE	Dry Sheep Equivalent
1109	DSG	Direct-Shift Gearbox
1110	DSID	Dismounted Soldier Identification System
1111	DSL	Digital Subscriber Line
1112	DSLR	Digital single-lens reflex (camera)
1113	DSM	Diagnostic and Statistical Manual of Mental Disorders
1114	DSN	Deep Space Network
1115	DSPL	Design Specialists and Plans Language
1116	DSR	Deformed Special Relativity
1117	DST	Daylight Saving Time
1118	DSTL	British Defence Science and Technology Laboratory
1119	DSWA	(U.S.) Defense Special Weapons Agency
1120	DTA	Dental Technologists Association
1121	DTD	Digital Terrain Data
1122	DTG	Date-Time Group
1123	DTH	Direct To Home (television)
1124	DTI	UK Department of Trade and Industry
1125	DTIC	(U.S.) Defense Technical Information Center
1126	DTL	Diode-Transistor Logic (electronics)
1127	DTMF	Dual-tone multi-frequency signaling
1128	DTO	Disruptive Technology Office (was ARDA)
1129	DTR	Determine The Relationship
1130	DTSA	(U.S.) Defense Technology Security Administration
1131	DUMBO	Down Under the Manhattan Bridge Overpass (Brooklyn neighborhood)
1132	DUSD	(U.S.) Deputy Under-Secretary of Defense
1133	DVLC	UK Driver and Vehicle Licencing Centre
1134	DVM	Doctor of Veterinary Medicine
1135	DVO	Direct View Optics
1136	DVOM	Digital Volt-Ohm Meter
1137	DVP	various meanings (disambiguation page)
1138	DW	Drum Workshop
1139	DWIM	Do What I Mean
1140	DWM	Doctor Who Magazine
1141	DWTS	Dancing with the Stars
1142	DWW	Down with Webster
1143	DXA	Dual-energy X-ray Absorptiometry
1144	DXM	DeXtroMethorphan
1145	DY	Dahomey (ISO 3166 digram; obsolete since 1977)
1146	Dy	Dysprosium
1147	DZA	Algeria (ISO 3166 trigram)
1148	E	East
1149	EABU	Explain Acronyms Before Use
1150	EAC	Echelons Above Corps
1151	EAPC	Euro-Atlantic Partnership Council
1152	EAST	Experimental Advanced Superconducting Tokamak
1153	EBD	Electronic Brake Distribution
1154	EBE	Extraterrestrial Biological Entity
1155	EBSA	Employee Benefits Security Administration
1156	EBW	Electron Beam Welding
1157	EBW	Exploding BridgeWire
1158	ECASS	European Centre for Analysis in the Social Sciences [1]
1159	ECBR	European Coalition for Biomedical Research
1160	ECCM	Electronic Counter-Counter-Measures
1161	ECFS	Electronic Case Filing System
1162	ECG	Electrocardiogram
1163	ECHR	European Court on Human Rights
1164	ECJ	European Court of Justice
1165	ECL	Emitter Coupled Logic (electronics)
1166	ECommHR	European Commission on Human Rights
1167	ECSC	European Coal and Steel Community (distant ancestor of the EU)
1168	ECT	ElectroConvulsive Therapy
1169	ECtHR	European Court of Human Rights
1170	EDA	European Defence Agency
1171	EDAC	Error Detection And Correction
1172	EDCS	Environmental Data Coding Specification
1173	EDH	Eastman Dental Hospital
1174	EDSA	Epifanio de los Santos Avenue (a major thoroughfare in Manila with great significance to post-1980 Philippines history)
1175	EDT	Eastern Daylight Saving Time (UTC−4 hours)
1176	EEC	European Economic Community (predecessor of the EU)
1177	EEG	ElectroEncephaloGram
1178	EENT	End Evening Nautical Twilight
1179	EEO	Equal Employment Opportunity
1180	EEOC	(U.S.) Equal Employment Opportunity Commission
1181	EEZ	Economic Exclusion Zone or Exclusive Economic Zone
1182	EFF	Electronic Frontier Foundation
1183	EFL	English as a Foreign Language
1184	EFM	Enterprise Feedback Management
1185	EFOA	European Fuel Oxygenates Association
1186	EFSA	European Food Safety Authority
1187	EFT	Electronic Fund Transfer
1188	EFV	Expeditionary Fighting Vehicle
1189	EG	Egypt (ISO 3166 digram)
1190	EGCG	EpiGalloCatechin-3-Gallate
1191	EGIS	Erieye Ground Interface Segment
1192	EGRET	Energetic Gamma-Ray Experiment Telescope
1193	EGY	Egypt (ISO 3166 trigram)
1194	EHF	Extremely High Frequency
1195	EHR	Equipment History Record
1196	Ei	Exbi
1197	EIA	Environmental Impact Assessment
1198	EIAH	Encyclopedia of Iranian Architectural History
1199	EIAH	Environnements Informatiques pour l'Apprentissage Humain
1200	EIC	East India Company
1201	EICS	East India Company's Service
1202	eID	electronic ID
1203	EIRP	Effective Isotropic Radiated Power
1204	EIS	Environmental Impact Statement
1205	EJ	Exajoule
1206	EK	Exakelvin
1207	EKG	Electrocardiogram (from German Elektrokardiogramm)
1208	EKMS	Electronic Key Management System
1209	EL	Exalitre
1210	ELINT	Electronic Intelligence
1211	ELL	English Language Learner
1212	ELM	Edge-Localised Mode (plasma physics)
1213	ELO	Electric Light Orchestra
1214	ELSS	Emergency Life Support Stores
1215	EM	ElectroMagnetism/ElectroMagnetic
1216	Em	Exametre
1217	EMA	European Medicines Agency
1218	EMCON	(Electromagnetic) Emissions Control
1219	EMDG	Euro-Missile Dynamics Group
1220	EMDR	Eye Movement Desensitisation and Reprocessing
1221	EMEA	Europe,Middle East and Africa
1222	EMG	ElectroMyoGraph
1223	EMP	ElectroMagnetic Pulse
1224	EMS	Emergency Medical Services
1225	EMT	Emergency Medical Technician
1226	EN	Corps of Engineers,Exanewton
1227	ENCODE	Encyclopedia of DNA Elements (human genome data project)
1228	ENE	East North-East
1229	ENG	England (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
1230	ENTEC	Euro NATO Training Engineer Centre
1231	ENVL	Envelope
1232	ENY	Enemy
1233	EOD	Explosive Ordnance Disposal
1234	EOG	ElectroOculoGraphy
1235	EOM	End of Message
1236	EOSAT	Earth Observation Satellite
1237	EOSDIS	Earth Observation Satellite Data and Information System
1238	EP	European Parliament
1239	EP	Extended play
1240	EPCOT	Experimental Prototype Community Of Tomorrow
1241	EPGS	EOS Polar Ground Sites
1242	EPIRB	Emergency Position Indicating Radio Beacon
1243	EPL	English Premier League
1244	EPOS	Electronic Point Of Sale
1245	EPPA	Employee Polygraph Protection Act
1246	EPR	European Pressurised [Nuclear] Reactor
1247	EQ	Emotional Quotient
1248	Er	Erbium
1249	ERCIM	European Research Consortium for Informatics and Mathematics
1250	ERI	Eritrea (ISO 3166 trigram)
1251	ERLAWS	Eastern Ruapehu Lahar Alarm and Warning System
1252	EROS	Earth Resources Observation System
1253	ERP	Engineer Regulating Point
1254	ERR	Eesti Rahvusringhääling
1255	ERS	Earth Resources Survey
1256	ERTS	Earth Resources Technology Satellite (became Landsat)
1257	ERV	Endogenous RetroVirus
1258	ES	Electronic warfare Support,Exasiemens,Spain (ISO 3166 digram; from the country's native name of España)
1259	ESA	Electro-Spark Alloying, Endangered Species Act, European Space Agency
1260	ESC	Embryonic Stem Cell, Electronic Stability Control
1261	ESDP	European Security and Defence Policy
1262	ESE	East South-East
1263	ESH	Western Sahara (ISO 3166 trigram)
1264	ESL	English as a Second Language
1265	ESM	Electronic warfare Support Measures
1266	ESO	European Southern Observatory
1267	ESOL	English for Speakers of Other Languages
1268	ESPN	Entertainment and Sports Programming Network
1269	EST	Eastern Standard Time (UTC−5 hours), Estonia (ISO 3166 trigram)
1270	ESU	Emergency Services Unit
1271	ESV	Engineer Support Vehicle
1272	ET	Ethiopia (ISO 3166 digram)
1273	ETH	Ethiopia (ISO 3166 trigram)
1274	ETI	Extra-Terrestrial Intelligence
1275	ETLA	Extended TLA
1276	ETM	Electronic Technical Manual, Enhanced Thematic Mapper
1277	ETT	Embedded Training Team
1278	EU	European Union
1279	Eu	Europium
1280	EUCOM	(U.S.) European Command
1281	EUUSA	European Union and United States of America
1282	EV	Exavolt
1283	EVA	Earned Value Analysis, Economic value added, Ethylene-Vinyl Acetate, Extra-Vehicular Activity
1284	EVIL	Electronic viewfinder (with) interchangeable lens (a type of digital camera)
1285	EWSD	Elektronisches Wählsystem Digital (German,'Electronic Digital Switching System')
1286	EWTN	Eternal Word Television Network
1287	Exatesla	Extra Terrestrial
1288	EXREP	Expeditious Repair (SM&R code)
1289	EZ	Extraction Zone
1290	f	Femto
1291	fA	Femtoampere
1292	FA	Food Addicts in Recovery Anonymous
1293	FAA	Financial Aid Administrator,Fleet Air Arm,Functional Area Analysis
1294	FAAD	Forward Area Air Defence
1295	FAADEZ	Forward Area Air Defence Engagement Zone
1296	FAAFP	Fellow of the American Academy of Family Physicians
1297	FAAN	Fellow of the American Academy of Neurology
1298	FAAN	Fellow of the American Academy of Nursing
1299	FAAQ	Frequently Asked and Anticipated Questions
1300	FAASV	Field Artillery Ammunition Supply Vehicle
1301	FAB	Feline Advisory Bureau (UK feline charity)
1302	FACA	(US) Federal Advisory Committee Act
1303	FACH	Fuerza Aérea de Chile
1304	FACN	Fellow of the American College of Nutrition
1305	FACP	Fellow of the American College of Physicians
1306	FACTS	Flexible Alternating Current Transmission System
1307	FAM	Foreign Affairs Manual
1308	FAO	Food and Agriculture Organization
1309	FAPA	Fellow of the American Psychological Association
1310	FAPHA	Fellow of the American Public Health Association
1311	FARP	Forward Arming and Refuelling Point / Forward Area Rearm/refuel Point
1312	FASCAM	Family of Scatterable Mines[1]
1313	FASD	Fetal Alcohol Spectrum Disorder
1314	FASEB	Federation of American Societies for Experimental Biology
1315	FAT	Field Artillery Tractor
1316	FAVS	Future Armoured Vehicle System
1317	FAW	Football Association of Wales
1318	FBCS	Fellow of the British Computer Society
1319	FBIDST	Fellow of the British Institute of Dental and Surgical Technologists
1320	FBIS	Foreign Broadcast Information Service
1321	FBM	Board foot
1322	fC	Femtocoulomb
1323	FCC	U.S. Federal Communications Commission
1324	FCE	First Certificate in English
1325	FCF	Financial Free Cash Flow
1326	FCLA	Fraud Claims Law Associate
1327	FCO	UK Foreign and Commonwealth Office
1328	FCW	Florida Championship Wrestling
1329	FD	Falun Dafa
1330	FDA	Food and Drug Administration (U.S.)
1331	FDBK	(I) Feedback
1332	Fe	Iron (Latin Ferrum)
1333	FEAST	Forum for European-Australian Science and Technology Cooperation
1334	FEATS	Festival of European Anglophone Theatrical Societies link title
1335	FEBA	Forward Edge of the Battle Area
1336	FED	Field Emission Display
1337	FEDEP	Federation Development Process (Simulation)
1338	FEF	Frontal Eye Field (neurophysiology)
1339	FEMA	Farm Equipment Manufacturers Association, U.S. Federal Emergency Management Agency,Fire Equipment Manufacturers' Association
1340	FENS	Federation of European Neuroscience Societies
1341	FES	Flywheel Energy Storage
1342	FEST	Frankfurt English Speaking Theatre link title
1343	FET	Field-effect transistor
1344	FEZ	Fighter Engagement Zone
1345	fF	Femtofarad
1346	FF	Final Fantasy
1347	FFB	Frum From Birth (referring to an observant Jew born into a religiously observant family)
1348	FFC	Free For Chat
1349	FFE	Fukuoka Futures Exchange
1350	FFF	Fédération française de football (French for: French Football Federation)
1351	FFG	Guided Missile Frigate (hull classification symbol)
1352	FFOV	Forward Field Of View
1353	FFR	Fédération française de rugby (French for: French Rugby (Union) Federation)
1354	FFS	For Fuck's Sake
1355	FFT	Final Fantasy Tactics
1356	FG	Falun Gong
1357	fg	Femtogram
1358	FG	Fog (METAR Code)
1359	FGOTUS	First Gentleman of the United States
1360	FGR	Flickr Group Roulette
1361	fH	Femtohenry
1362	FHFIF	Foster's Home for Imaginary Friends
1363	FHI	Family Health International, Fuji Heavy Industries,Ltd.
1364	FI	Finland (ISO 3166 digram)
1365	FIAT	Fabbrica Italiana Automobili Torino (Italian for: Italian Car Factory of Turin)
1366	FIB	Fucking Illinois Bastard (Wisconsin slang, variants exist)
1367	FIBUA	Fighting In Built-Up Areas
1368	FIC	Fellowship for Intentional Community
1369	FID	Foreign Internal Defence
1370	FIE	Fly-In Echelon
1371	FIFA	Fédération internationale de football association (French for: International Association Football Federation)
1372	FIFe	Fédération internationale féline (French for: International Feline Federation)
1373	FIFO	First In, First Out
1374	FIFRA	Federal Insecticide, Fungicide, and Rodenticide Act
1375	FIGJAM	Fuck I'm Good, Just Ask Me
1376	FIMPT	Fellow of the Institute of Maxillofacial Prosthetists and Technologists
1377	FIN	Finland (ISO 3166 trigram)
1378	FINA	Fédération internationale de natation (French for: International Swimming Federation)
1379	FIRES	Fever Induced Refractory Epilepsy Syndrome or Febrile Infection-Related Epilepsy Syndrome
1380	FIS	Fédération internationale de ski (French for: International Ski Federation)
1381	FISA	Fédération Internationale des Sociétés d'Aviron (French for: International Federation of Rowing Associations)
1382	FISH	Fluorescence In-Situ Hybridisation
1383	FiST	Fire Support Team
1384	FITS	Flexible Image Transport System
1385	FIU	Florida International University
1386	fJ	Femtojoule
1387	FJ	Fiji (ISO 3166 digram)
1388	FJI	Fiji (ISO 3166 trigram)
1389	FJN	Financial Job Network
1390	FK	Falkland Islands (ISO 3166 digram)
1391	fK	Femtokelvin
1392	FKSM	Fort Knox Supplemental Manual
1393	FKT	Fastest Known Time
1394	fL	Femtolitre
1395	FL	Florida (postal symbol)
1396	fl	floruit (Latin for: living) (genealogy)
1397	FLA	Florida,Front Line Assembly,Future Large Aircraft
1398	FLAB	Four-letter abbreviation
1399	FLAC	Free Legal Advice Centres
1400	FLAC	Free Lossless Audio Codec
1401	FLAK	Flug-Abwehr-Kanone (German for: Anti-Aircraft Guns)
1402	FLB	Forward Logistics Base
1403	FLET	Forward Line of Enemy Troops
1404	FLG	Falun Gong
1405	FLIP	Flight Information Publication
1406	FLIR	Forward Looking InfraRed (sensor)
1407	FLK	Falkland Islands (ISO 3166 trigram)
1408	FLOT	Forward Line of Own Troops
1409	FLOTUS	First Lady of the United States (the wife of the President of the United States)
1410	FLQ	Free Legal Questions
1411	FLQ	Front de libération du Québec (French for: Québec Liberation Front)
1412	FLSA	Fair Labor Standards Act
1413	FLTSAT	Fleet Satellite
1414	FLTSATCOM	Fleet Satellite Communication System
1415	FLUBOS	Fat, Lazy, Useless, Bag Of Shit
1416	FM	Factory Mutual
1417	FM	Federal Magistrate (Australian post-nominal),Federated States of Micronesia (postal symbol; ISO 3166 digram),Field Manual,Flight Manager,Frequency Modulation (electronics)
1418	fm	Femtometre
1419	Fm	Fermium
1420	FMC	Federal Magistrates' Court (an Australian federal court,formerly FMS),Food Machinery Corporation (original name of the company now known as FMC Corporation)
1421	FMCA	Federal Magistrates' Court of Australia (used for citing decisions of the FMC other than family law decisions)
1422	FMCAfam	Federal Magistrates' Court of Australia: family (used for citing family law decisions of the FMC)
1423	FMCG	Fast Moving Consumer Goods
1424	FME	Formal Methods Europe
1425	FMECA	Failure Modes and Effect Criticality Analysis
1426	FMJD	Fédération Mondiale du Jeu de Dames
1427	FMLA	Family Medical Leave Act
1428	FoE	Friends of the Earth
1429	FOGC	Federal Oil and Gas Council
1430	FOH	Front Of House
1431	FOIA	Freedom of Information Act
1432	FOM	Federation Object Model
1433	FONSI	Finding of No Significant Impact
1434	FOO	Forward Observation Officer
1435	FOOP	Friends Of Organ Pipes (Volunteer group)
1436	FoS	Family of Systems
1437	FOSE	Fallout 3 Script Extender
1438	FOSE	Federal Office Systems Expo
1439	FOT	Free on truck
1440	FOTA	Fellow of the Orthodontic Technicians Association
1441	FOTC	Flight of the Conchords
1442	FOUO	For Official Use Only
1443	FPF	Federação Portuguesa de Futebol (Portuguese for: Portuguese Football Federation), Final Protective Fire
1444	FPS	Fire Prevention System
1445	FQ	French Southern and Antarctic Territories (ISO 3166 digram; obsolete 1979)
1446	FR	France (ISO 3166 digram)
1447	Fr	Francium
1448	FRA	Federal Railroad Administration, France (ISO 3166 trigram)
1449	FRAND	Fair,reasonable,and non-discriminatory (concept in standards-setting and intellectual property law)
1450	FRCP	Federal Rules of Civil Procedure,Fellow of the Royal College of Physicians
1451	FRICBM	Full Range ICBM
1452	FRO	Faroe Islands (ISO 3166 trigram)
1453	FRS	Fellow of the Royal Society, U.S. Federal Reserve System
1454	FRSA	Fellow of the Royal Society of Art
1455	FRY	Federal Republic of Yugoslavia
1456	fs	Femtosecond
1457	fS	Femtosiemens
1458	FSA	Fire Support Area, UK Food Standards Agency, Functional Solution Analysis
1459	FSC	Federal Supply Classification, Forest Stewardship Council (ecological pressure group)
1460	FSCL	Fire Support Co-ordination Line
1461	FSE	Fire Support Element
1462	FSF	Free Software Foundation
1463	FSH	Follicle Stimulating Hormone
1464	FSI	Fuel Stratified Injection
1465	FSS	Fire Support Station
1466	FSSP	Families of Structurally Similar Proteins
1467	FSTC	Foreign Science Technology Center (now NGIC)
1468	fT	Femtotesla
1469	FTC	Federal Trade Commission
1470	FTE	Full Time Equivalent
1471	FTL	Faster Than Light
1472	FTS	Flight Termination System used during some rocket launches
1473	FTS	Fuck That Shit
1474	FU	Smoke (METAR Code)
1475	FUBAR	Fucked/Fouled Up Beyond All Recognition/Repair
1476	fV	Femtovolt
1477	fW	Femtowatt
1478	FW	Forward
1479	FWC	Football World Cup
1480	FWF	Fixed Word Format
1481	FWI	French West Indies
1482	FWIW	For What It's Worth
1483	FWS	U.S. Fish and Wildlife Service
1484	FWT	Fresh Water Tank
1485	FXX	Metropolitan France (ISO 3166 trigram; obsolete 1997)
1486	FYA	For Your Agenda
1487	FYDP	Five-Year Defense Plan (U.S.)
1488	FYI	For Your Information
1489	FYROM	Former Yugoslav Republic of Macedonia
1490	FZDZ	Freezing Drizzle (METAR Code)
1491	FZFG	Freezing Fog (METAR Code)
1492	FZRA	Freezing Rain (METAR Code)
1493	g	Gram
1494	G3	Heckler & Koch G3
1495	GAAR	General Anti-Avoidance Rule (tax evasion)
1496	GAB	Gabon (ISO 3166 trigram)
1497	GABA	Gamma-AminoButyric Acid
1498	GAD	Generalized Anxiety Disorder
1499	GAF	Garfield and Friends
1500	GAO	U.S. Government Accountability Office
1501	GAW	Global Atmospheric Watch
1502	GB	United Kingdom of Great Britain and Northern Ireland (ISO 3166 digram) [glamour boy 7-9/10]
1503	GBBC	Great (Global) Backyard Bird Count
1504	GBE	Knight/Dame Grand Cross of the Order of the British Empire
1505	GBR	United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram)
1506	GCA	Graduate in Claims Administration
1507	GCD	see entry
1508	GCF	Greatest Common Factor
1509	GCI	Ground-controlled interception
1510	GCN	Gamma-ray burst Coordination Network
1511	GCS	Global Coordinate System
1512	GCSE	General Certificate of Secondary Education (UK)
1513	Gd	Gadolinium
1514	GD	Grenada (ISO 3166 digram)
1515	GDL	Game Definition Language
1516	GDR	General Distribution Release (Microsoft Term for a software service release; between Hotfix and Service Pack)
1517	GDR	German Democratic Republic (cf. DDR)
1518	GDW	Game Designers Workshop
1519	Ge	Germanium
1520	GEBCO	General Bathymetric Chart of the Oceans
1521	GEC	Great Engineering Challenge
1522	GED	General Educational Development (high school equivalency credential in the U.S. and Canada)
1523	GEEP	Geophysical Equipment Exploration Platform
1524	GEN	Full General (four stars) in the U.S. Army
1525	GeV	Gigaelectron-volt
1526	GEV	Ground Effect Vehicle
1527	GFCI	Ground Fault Circuit Interruptor (aka GFI)
1528	GFI	Ground Fault Interruptor (aka GFCI)
1529	GFL	German Football League (Germany's Bundesliga for American football; the English-language name is used in German without translation)
1530	GFN	Global Footprint Network
1531	GFY	'good for you' or 'go fuck yourself', depending on the context (Internet chat)
1532	GGK	Good God Karma
1533	GHA	Ghana (ISO 3166 trigram)
1534	GHB	gamma-Hydroxybutyric acid
1535	Gi	Gibi
1536	GIB	Gibraltar (ISO 3166 trigram)
1537	GIG	Global Information Grid
1538	GINO	Godzilla In Name Only
1539	GISS	General Impression of Size and Shape,Goddard Institute for Space Studies
1540	GJ	Gigajoule,Gujarat (Indian state code)
1541	GJD	Geocentric Julian Day
1542	GK	Gigakelvin
1543	GLAAD	Gay and Lesbian Alliance Against Defamation
1544	GLAC	General Ledger Accounting Code
1545	GLAST	Gamma-ray Large Area Space Telescope
1546	GLBA	Gramm-Leach-Bliley Act
1547	GLC	Gas-liquid chromatography
1548	GLP	Guadeloupe (ISO 3166 trigram)
1549	GLV	Gained Life Value
1550	Gm	Gigametre
1551	GM	The Gambia (ISO 3166 digram),GameMaster (role-playing),General Motors,Genetically Modified,Guru Meditation (computing)
1552	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
1553	GMB	The Gambia (ISO 3166 trigram),General,Municipal,Boilermakers (and Allied Trade Union)
1554	GMFSC	Ground Mobile Forces Satellite Communications
1555	GMO	Genetically Modified Organism
1556	GMPCS	Global Mobile Personal Communications by Satellite
1557	GNAS	Grand National Archery Society
1558	GNB	Guinea-Bissau (ISO 3166 trigram)
1559	GNP	Gross National Product
1560	GNQ	Equatorial Guinea (ISO 3166 trigram)
1561	GnRH	Gonadotropin-Releasing Hormone
1562	GOA	General of the Army (United States only)
1563	GOAT	Greatest Of All Time
1564	GOC	General Officer Commanding
1565	GOES	Geostationary Operational Environmental Satellite
1566	GOP	Grand Old Party
1567	gorp	granola,oats,raisins,peanuts (another name for trail mix),probably a backronym
1568	GOSC	General Officer Steering Committee
1569	GOSH	Great Ormond Street Hospital
1570	GOSP	Gas/Oil Separation Plant
1571	GOTS	Government off-the-shelf
1572	GOYADIN	Get Off Your Arse,Do It Now (anti-procrastination mantra)
1573	GP	General Practitioner,General Purpose,Grand Prix,Guadeloupe (ISO 3166 digram)
1574	GPA	Grade Point Average
1575	GPC	Global Path Cache
1576	GPIB	General-Purpose Instrumentation/Interface Bus
1577	GPO	General Post Office
1578	GPPC	Genetics and Public Policy Center
1579	GPR	Ground-Penetrating Radar
1580	GPS	General Problem Solver,Global Positioning System
1581	GPT	General Purpose Technology, Get paid to surf (an online business model)
1582	GQ	Equatorial Guinea (ISO 3166 digram),Gentlemen's Quarterly (the original name of the magazine now known simply as GQ),GR[edit]
1583	GR	Greece (ISO 3166 digram),Hail (METAR Code)
1584	GRAIL	Gravity Recovery and Interior Laboratory
1585	GRAS	Generally recognized as safe (FDA list)
1586	GRB	Gamma-Ray Burst
1587	GRC	Greece (ISO 3166 trigram)
1588	GRD	Grenada (ISO 3166 trigram)
1589	GRE	Graduate Record Examination,Greece (IOC and FIFA trigram,but not ISO 3166)
1590	grep	[search] Globally for Regular Expression,Print [lines]
1591	GRID	Gay-Related Immune Deficiency (original name of AIDS)
1592	GRid	Global Release Identifier,a music industry identifier from the RIAA and IFPI
1593	GriT	Girl raised in Texas (Woman presenting firm southern traits/beliefs)
1594	GRL	Greenland (ISO 3166 trigram)
1595	GRN	Grenada (IOC and FIFA trigram,but not ISO 3166),Goods Received Note
1596	Gs	Gigasecond
1597	GSA	U.S. General Services Administration
1598	GSD	Graphical Situation Display
1599	GSGB	(God send glamour boy 9-10/10)
1600	GSK	GlaxoSmithKline [good sexual karma]
1601	GSN	Game Show Network
1602	GSO	General Services Officer (U.S. Department of State)
1603	GSOH	Good Sense Of Humour
1604	GSP	Georges St-Pierre (Canadian MMA fighter)
1605	GSR	Gun Shot Residue
1606	GSS	Generic Security Services
1607	GSW	Gunshot wound
1608	GTD	Getting Things Done
1609	GTG	Got To Go (Internet chat)
1610	GTGN	Getty Thesaurus of Geographic Names
1611	GTK	Good To Know (Internet chat)
1612	GTM	Guatemala (ISO 3166 trigram)
1613	GU	Guam (postal symbol; ISO 3166 digram)
1614	GUF	French Guiana (ISO 3166 trigram)
1615	GUILT	Gangliated Utrophin Immuno Latency Toxin
1616	GULCR	Grupo de Usuarios de Linux de Costa Rica
1617	GUT	Grand Unification Theory
1618	GV	Gigavolt
1619	GWARS	Ground Warfare System (simulation)
1620	GWAS	Grand Western Archery Society
1621	GWOT	Global War on Terrorism
1622	GXE	Gene-enivronment interaction
1623	GXM	Matrox Graphics eXpansion Module
1624	GY	Guyana (ISO 3166 digram)
1625	GZ	Ground Zero
1626	GZK	Greisen-Zatsepin-Kuzmin cut-off (cosmic ray energies)
1627	h	Hecto
1628	H	Henry
1629	H1	First half of the year
1630	H2	Second half of the year
1631	HA	High Availability
1632	HAARP	High Frequency Active Auroral Research Program
1633	HAART	Highly Active Anti-Retroviral Therapy
1634	HAI	Human Awareness Institute
1635	HAL	Hardware Abstraction Layer
1636	HALO	High Altitude Low Opening (parachute jump)
1637	HAM	Amateur radio operator
1638	HANS	Head And Neck Support (device used in many race cars)
1639	HARM	High-speed Anti-Radiation Missile
1640	HAW	Heavy Antitank Weapon
1641	HAWK	Homing All the Way Killer (air defence system)
1642	HAZ	Heat-Affected Zone
1643	HAZMAT	Hazardous Materials
1644	HBCD	HexaBromoCycloDodecane
1645	HBO	Home Box Office
1646	HBR	Harvard Business Review
1647	HBT	Heterojunction Bipolar Transistor
1648	HBV	Hepatitis B Virus
1649	HCCI	Homogeneous Charge Compression Ignition
1650	HCF	Highest Common Factor
1651	HCSC	Higher Command and Staff Course
1652	HDL	High-Density Lipoprotein
1653	HDM	Human Decision-Making
1654	HDRA	Henry Doubleday Research Association
1655	He	Helium
1656	HE	High Explosive
1657	HEAT	High Explosive Anti-Tank (ammunition)
1658	HEBA	Hellenic Basketball Clubs Association
1659	HEER	High-Explosive Extended Range (ammunition)
1660	HEIC	Honourable East India Company
1661	HEMP	High-Altitude Electromagnetic Pulse
1662	HEOSS	High Earth Orbit Space Surveillance
1663	HEP	High-Explosive Plastic (ammunition)
1664	HEPA	High-Efficiency Particulate Air (filter)
1665	HESV	Heavy Engineering Support Vehicle
1666	HETT	Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
1667	HEU	Highly Enriched Uranium
1668	Hf	Hafnium
1669	HF	High Frequency
1670	HFE	Human Fertilisation and Embryology (UK Act)
1671	HFE	The common-emitter current gain in a BJT transistor (also represented by βF). See: BJT
1672	HFEA	Human Fertilisation and Embryology Authority (UK)
1673	Hg	Mercury (Latin Hydrargyrum)
1674	HGC	UK Human Genetics Commission
1675	HGF	Human Growth Factor
1676	HGTV	Home & Garden Television
1677	HI	Hawaii (postal symbol)
1678	HIH	His (or Her) Imperial Highness
1679	HIM	His (or Her) Imperial Majesty
1680	HIMAD	High to Medium Altitude Air Defence (see also H/MAD)
1681	HIMEZ	High Altitude Missile Engagement Zone
1682	HIMYM	How I Met Your Mother
1683	HIPAA	U.S. Health Insurance Portability and Accountability Act
1684	Hipparcos	HIgh Precision Parallax COllecting Satellite
1685	Hird	Hurd of interfaces representing depth (cf. HURD)
1686	HiRISE	High Resolution Imaging Science Experiment
1687	HIT	Health Information Technology
1688	HIV	Human Immunodeficiency Virus
1689	HIWT	Hobart Institute of Welding Technology
1690	HJD	Heliocentric Julian Day
1691	HK	Hong Kong (ISO 3166 digram)
1692	HKG	Hong Kong (ISO 3166 trigram)
1693	HKS	HyperKinetic Syndrome
1694	hL	Hectolitre
1695	HL	Holding Line
1696	HLL	High-Level Language
1697	HLN	Headline News
1698	HLOS	High Level Output Specification
1699	HM	Heard Island and McDonald Islands (ISO 3166 digram)
1700	HMCE	Her/His Majesty's Customs and Excise (former UK government department; succeeded by HM Revenue and Customs)
1701	HMD	Heard and McDonald Islands (ISO 3166 trigram)
1702	HMF	HydroxyMethyl Furfural
1703	HMO	Health maintenance organization
1704	HMP	Her Majesty's Prison
1705	HMRC	Her/His Majesty's Revenue and Customs
1706	HMSO	Her Majesty's Stationery Office
1707	HMV	His Master's Voice
1708	HN	Honduras (ISO 3166 digram)
1709	HND	Honduras (ISO 3166 trigram)
1710	Ho	Holmium
1711	HOLLAND	Hope Our Love Lasts And Never Dies
1712	HOSTAC	Helicopter Operations from Ships Other Than Aircraft Carriers
1713	HOT	Highly Optimised Tolerance
1714	HOTAS	Hands on throttle-and-stick
1715	HOV	High Occupancy Vehicle
1716	hp	horse power
1717	HPA	UK Health Protection Agency
1718	HPCL	Hindustan Petroleum Corporation Limited
1719	HPLC	High Performance Liquid Chromatography
1720	HPT	High[er] Payoff Target
1721	HPV	Human Papilloma Virus
1722	HQ	HeadQuarters
1723	HRBL	High-level Representation of Behavior Language (original name of the Herbal language)
1724	HRD	Human Resource Development
1725	HRF	High iness Forces
1726	HRH	His (or Her) Royal Highness
1727	HRM	His (or Her) Royal Majesty
1728	HRM	Human Resource Management
1729	HRT	Hormone Replacement Therapy
1730	Hs	Hassium
1731	HSBC	The Hong Kong and Shanghai Banking Corporation
1732	HSC	Higher School Certificate
1733	HSM	High School Musical
1734	HSMAD	Human Science/Modeling and Analysis Data
1735	HSN	Home Shopping Network
1736	HSPH	Harvard School of Public Health
1737	HSSI	High-Speed Serial Interface
1738	HST	see entry
1739	HTA	HyperText Application
1740	HTFU	Harden The Fuck Up
1741	HTH	Hope That Helps
1742	HTI	Haiti (ISO 3166 trigram)
1743	HTR	Heated Towel Rail
1744	HTS	High-Temperature Superconducting wire
1745	HTTP	HyperText Transfer Protocol
1746	HU	Hungary (ISO 3166 digram)
1747	HUHA	Head up his/her ass (Marine salute; probably a backcronym)
1748	HUN	Hungary (ISO 3166 trigram)
1749	HURD	Hird of Unix-Replacing Daemons (cf. Hird)
1750	HV	Upper Volta (ISO 3166 digram; obsolete 1984)
1751	HVAP	High Velocity Armour Piercing (ammunition)
1752	HVHF	High velocity human factors
1753	HVM	High Velocity Missile
1754	HVO	Upper Volta (ISO 3166 trigram; obsolete 1984)
1755	HWM	Hardware morphing (computer graphics rendering)
1756	HXB	The glycoprotein Tenascian C
1757	HZ	Haze (METAR Code)
1758	Hz	Hertz
1759	IA	Iowa (postal symbol)
1760	IAAL	I Am A Lawyer
1761	IAB	International Association for Biologicals
1762	IAD	Ion Assisted Deposition
1763	IADS	Integrated Air Defence System
1764	IAEA	International Atomic Energy Agency
1765	IAF	{i} Industrial Areas Foundation
1766	IAFG	Information Assurance Focus Group
1767	IANA	Internet Assigned Numbers Authority
1768	IANAL	I Am Not A Lawyer
1769	IAS	Image Assessment System
1770	IASIP	It's Always Sunny in Philadelphia
1771	IATA	International Air Transport Association
1772	IATF	International Automotive Task Force
1773	IATSE	International Alliance of Theatrical Stage Employees
1774	IAUC	International Astronomical Union Circular
1775	IAW	In Accordance With
1776	IB	International Baccalaureate
1777	IBA	Important Bird Area
1778	IBD	Inflammatory Bowel Disease
1779	IBDM	Information Based Decision Making
1780	IBM	International Business Machines
1781	IBRD	International Bank for Reconstruction and Development (part of the World Bank)
1782	IBS	Irritable Bowel Syndrome
1783	IC	Ice Crystals (METAR Code),Integrated Circuit,[inner circle]
1784	ICANN	Internet Corporation for Assigned Names and Numbers
1785	ICAO	International Civil Aviation Organization
1786	ICBM	Intercontinental Ballistic Missile
1787	ICBN	International Code of Botanical Nomenclature
1788	ICE	In case of emergency, Immigration and Customs Enforcement
1789	ICES	International Council for the Exploration of the Sea
1790	ICF	Intelligent Community Forum
1791	ICMP	Internet Control Message Protocol
1792	ICNAF	International Commission for the Northwest Atlantic Fisheries (became NAFO in 1978)
1793	ICO	Intermediate Circular Orbit
1794	ICPE	International Conference on Pharmacoepidemiology,the annual conference of the International Society for Pharmacoepidemiology
1795	ICRAF	International Centre for Research in Agroforestry (a.k.a. World Agroforestry Centre since 2002)
1796	ICRISAT	International Crops Research Institute for the Semi-Arid Tropics
1797	ICRL	Individual Component Repair List
1798	ICRS	International Celestial Reference System
1799	ICSI	Intracytoplasmic Sperm Injection
1800	ICT	Information and communication technologies
1801	ICTH	Island Closest to Heaven/Hell Final Fantasy VIII
1802	ICV	Infantry Carrier Vehicle
1803	ICYMI	In Case You Missed It
1804	ID	Idaho (postal symbol),Identity,Indonesia (ISO 3166 digram),Infantry Division,Intelligent Design,ID10T Error,Idiot User Error (IT help desk inside joke)
1805	IDC	International Data Corporation
1806	IDDI	I don't do initialisms (see irony)
1807	IDGAF	I don't give a fuck
1808	IDK	I don't know
1809	IDL	Interface Definition Language
1810	IDN	Indonesia (ISO 3166 trigram)
1811	IEA	International Energy Agency
1812	IEC	International Electrotechnical Commission
1813	IED	Improvised Explosive Device
1814	IELTS	International English Language Testing System
1815	IER	Information Exchange Requirement
1816	IET	Initial Entry Training
1817	IET	Institution of Engineering and Technology
1818	IETF	Internet Engineering Task Force
1819	IEW	Intelligence and Electronic Warfare
1820	IFAB	International Football Association Board
1821	IFAH	International Federation for Animal Health
1822	IFAP	International Federation of Agricultural Producers
1823	IFO	Identified Flying Object (see also UFO)
1824	IFOV	Instantaneous Field of View
1825	IFPI	International Federation of Phonographic Industries
1826	IFRB	International Frequency Registration Board
1827	IFV	Infantry Fighting Vehicle
1828	IG	Inspector General
1829	IGNOU	Indira Gandhi National Open University
1830	IGS	International Ground Station
1831	IHH	Idiopathic Hypogonadotropic Hypogonadism
1832	IHO	International Hydrographic Organization
1833	IHR	Institute for Historical Review
1834	IHSI	Institutum Historicum Societatis Iesu (Jesuit Historical Institute)
1835	II	Two (in Roman numerals)
1836	IICA	Inter-American Institute for Cooperation on Agriculture
1837	IIE	Innovative Interstellar Explorer
1838	III	Three (in Roman numerals)
1839	IIRC	If I Recall/Remember Correctly
1840	IISS	International Institute for Strategic Studies
1841	IJN	Imperial Japanese Navy (World War II)
1842	IJWP	Interim Joint Warfare Publication
1843	ILDS	Improved Landmine Detection System
1844	ILO	International Labour Organization
1845	ILRI	International Livestock Research Institute
1846	ILY	I Love You [pronounced ILL-LEE]
1847	IM	Instant Message (internet speech)
1848	IMBD	International Migratory Bird Day
1849	IMDb	Internet Movie Database
1850	IME	In My Experience
1851	IMHO	In My Humble/Honest Opinion
1852	IML	International Mister Leather
1853	IMNSHO	In My Not So Humble Opinion
1854	IMPAC	International Merchant Purchase Authorization Card
1855	IMPACT	International Medical Products Anti-Counterfeiting Taskforce
1856	IMPATT	IMPact Avalanche Transit Time diode
1857	IMPT	Institute of Maxillofacial Prosthetists and Technologists
1858	IMRL	Individual Material iness List
1859	IMRO-Internal Macedonian Revolutionary Organization	Irish Music Rights Organisation
1860	IMsL	International Ms. Leather
1861	IMT	Integrated Management Tool
1862	IMU	International Mathematical Union
1863	IN	India (ISO 3166 digram),Indiana (postal symbol),Infantry
1864	In	Indium
1865	INA	Immigration and Nationality Act
1866	INAS	International Near-Earth Asteroid Survey
1867	INCITS	InterNational Committee for Information Technology Standards
1868	IND	India (ISO 3166 trigram)
1869	INDIGO	(U.S.) INtelligence DIvision Gaming Operation
1870	inet	the Internet
1871	INFORMS	(U.S.) Institute for Operations Research and the Management Sciences
1872	INFOSEC	Information Security
1873	INLA	Irish National Liberation Army
1874	INMARSAT	International Maritime Satellite organization
1875	INRIA	Institut national de recherche en informatique et en automatique
1876	INS	Immigration and Naturalization Service
1877	InSAR	Interferometric synthetic aperture radar
1878	INST	Information Standards and Technology
1879	INTERFET	International Force for East Timor
1880	INTSUM	Intelligence Summary
1881	IO	British Indian Ocean Territory (ISO 3166 digram)
1882	IOT	British Indian Ocean Territory (ISO 3166 trigram)
1883	IPB	Intelligence Preparation of the Battlefield
1884	IPL	Inferior Parietal Lobule
1885	IPO	Initial Public Offering
1886	IPT	Integrated Product/Project Team
1887	IPTS	Institute for Prospective Technological Studies
1888	IPTV	Internet Protocol TeleVision
1889	IPW	Interrogation of Prisoners of War
1890	Ir	Iridium
1891	IRAD	Internal Research and Development
1892	IRAN	(I) Inspect and Repair As Necessary
1893	IRAS	Infrared Astronomical Satellite
1894	IRB	International Rugby Board
1895	IRBM	Intermediate Range Ballistic Missile
1896	IREA	Intermountain Rural Electric Association
1897	IRINN	Islamic Republic of Iran News Network
1898	IRL	Ireland (ISO 3166 trigram),Industrial Research Limited,Indy Racing League,In real life
1899	IRN	Iran (ISO 3166 trigram)
1900	IRO	International Refugee Organisation
1901	IRQ	Iraq (ISO 3166 trigram)
1902	IRS	U.S. Internal Revenue Service
1903	IRST	Infra-red Search and Track
1904	IS	Iceland (ISO 3166 digram)
1905	ISAAA	International Service for the Acquisition of Agri-biotech Applications
1906	ISAR	Inverse SAR (Synthetic Aperture Radar)
1907	ISB	Intermediate Staging Base
1908	ISBN	International Standard Book Number (ISO 2108)
1909	ISCCP	International Satellite Cloud Climatology Project
1910	ISCII	Indian Standard Code for Information Interchange
1911	ISDN	Integrated Services Digital Network
1912	ISEF	Intel International Science and Engineering Fair
1913	ISEN	Internet Search Environment Number
1914	ISF	Internal Security Force
1915	ISIL	Islamic State of Iraq and the Levant
1916	ISIS	Institute for Science and International Security, or: Islamic State of Iraq and Syria
1917	ISL	Iceland (ISO 3166 trigram)
1918	ISLN	International Standard Lawyer Number (used initially by LexisNexis Martindale-Hubbell)
1919	ISMB	International Society of Matrix Biologists
1920	ISMC	Intelligent Sounding Meaningless Conversation
1921	ISOGP	Indian Society of Orthodontics for General Practitioners [2]
1922	ISPE	International Society for Pharmacoepidemiology
1923	ISRO	Indian Space Research Organisation
1924	ISSCR	International Society for Stem Cell Research
1925	ISSN	International standard serial number (ISO 3297)
1926	ISTC	Institute of Scientific and Technical Communications (UK)
1927	ISTS	Intel Science Talent Search
1928	ITA	Italy (ISO 3166 trigram)
1929	ITAG	Inertial Terrain-Aided Guidance
1930	ITALY	I'll Truly Always Love You
1931	ITAS	Improved Target Acquisition Sight
1932	ITC	InferoTemporal Cortex (neurophysiology)
1933	ITCZ	Intertropical Convergence Zone
1934	ITEC	Information Technology Exposition & Conference
1935	ITEMS	Interactive Tactical Environment Management System
1936	ITER	International Thermonuclear Experimental Reactor
1937	ITF	International Tennis Federation
1938	ITK	In The Know
1939	ITN	Independent Television News (British)
1940	ITT	International Telephone and Telegraph (U.S.)
1941	ITTO	International Tropical Timber Organization
1942	IUCN	International Union for the Conservation of Nature and Natural Resources (World Conservation Union)
1943	IV	Four (in Roman numerals),IntraVenous (as in intravenous drip or intravenous therapy)
1944	Iveco	Industrial Vehicles Corporation
1945	IVF	In Vitro Fertilisation
1946	IVI	Interchangeable Virtual Instrument
1947	IVIS	Inter-Vehicle Information System
1948	IVL	Inter-Visibility Line
1949	IVM	In Vitro [Oocyte] Maturation
1950	IVO	In Vicinity Of
1951	IW	Information Warfare
1952	IWARS	Infantry Warrior Simulation
1953	IWC	International Whaling Commission
1954	IWW	Industrial Workers of the World
1955	IX	Nine (in Roman numerals)
1956	IXT	IntraText digital library; IntraText lexical hypertext
1957	J	Joule
1958	J1	Joint [Manpower &] Personnel Directorate
1959	J2	Joint Intelligence Directorate
1960	J3	Joint Operations Directorate
1961	J4	Joint Logistics Directorate
1962	J5	Joint Strategic Plans & Policy Directorate
1963	J7	Joint Operational Plans & Interoperability Directorate
1964	JAFT	Just A Field Test
1965	JAL	Japan Airlines
1966	JALLC	Joint Analysis and Lessons Learned Centre (NATO)
1967	JAM	Jamaica (ISO 3166 trigram)
1968	JAMA	Journal of the American Medical Association
1969	JANET	Joint Academic Network
1970	JATO	Jet-Assisted Take-Off
1971	JB	Jail Bait
1972	JB	Junior Branch
1973	JBFSA	Joint Blue Force Situational Awareness
1974	JCDB	Joint Common Data Base
1975	JCDS	Joint Chiefs of the Defence Staff
1976	JCIDS	Joint Capabilities Integration and Development System
1977	JCL	Job Control Language
1978	JCP	Java Community Process
1979	JCS	Joint Chiefs of Staff
1980	JCW	Juggalo Championship Wrestling
1981	JDBC	Java Data Base Connectivity
1982	JDEM	Joint Dark Energy Mission
1983	JDL	Jewish Defense League
1984	JEFX	Joint Expeditionary Force eXperiment
1985	JET	Joint European Torus
1986	JEZ	Joint Engagement Zone
1987	JFACC	Joint Force Air Component Commander
1988	JFACTSU	U.S. Joint Forward Air Control Training and Standards Unit
1989	JFC	Joint Force Commander
1990	JFK	John Fitzgerald Kennedy or the airport named after him.
1991	JFLCC	Joint Force Land Component Commander
1992	JFMCC	Joint Force Maritime Component Commander
1993	JFO	Journal of Field Ornithology
1994	JFSOCC	Joint Force Special Operations Component Commander
1995	JFTX	Joint Field Training Exercise
1996	JH	Japan Highway Public Corporation
1997	JH	Jharkhand (Indian state code)
1998	JI	Joint Implementation
1999	JIB	Joint Information Bureau
2000	JIC	Joint Intelligence Centre
2001	JINI	Java Intelligent Network Infrastructure
2002	JITC	Joint Interoperability Test Command
2003	JIVE	Joint Institute for VLBI (Very Long Baseline Interferometry) in Europe
2004	JJAP	Japanese Journal of Applied Physics
2005	JL	Japan Airlines (IATA airline designator)
2006	JLA	Justice League of America
2007	JM	Jamaica (ISO 3166 digram)
2008	JMS	Java Message Service
2009	JO	Jordan (ISO 3166 digram)
2010	JOA	Joint Operations Area
2011	JOPES	Joint Operations Planning and Execution System
2012	JOR	Jordan (ISO 3166 trigram)
2013	JOTS	Joint Operations Tactical System
2014	JPL	Jet Propulsion Laboratory
2015	JPN	Japan (ISO 3166 trigram)
2016	JPOW	Joint Project Optic Windmill
2017	JRDF	Joint Rapid Deployment Forces
2018	JRE	Java Runtime Environment
2019	JREF	James Randi Educational Foundation
2020	JROC	Joint Requirements Oversight Council
2021	JROCM	JROC Memorandum
2022	JRRF	Joint Rapid Reaction Force
2023	JRSAI	Journal of the Royal Society of Antiquaries of Ireland
2024	JSAP	Japan Society of Applied Physics
2025	JSCSC	Joint Services Command and Staff College
2026	JSEAD	Joint Suppression of Enemy Air Defence (see SEAD)
2027	JSF	Joint Strike Fighter
2028	JSIMS	Joint Simulation System
2029	JSOA	Joint Special Operations Area
2030	JSOTF	Joint Special Operations Task Force
2031	JSP	JavaServer Page
2032	JSP	Joint Services Publication
2033	JSR	Java Specification Request
2034	JSS	Joint Support Ship Project
2035	JTC	Joint Training Confederation
2036	JTF	Joint Task Force
2037	JTFEX	Joint Task Force Exercise
2038	JTLS	Joint Theater Level Simulation
2039	JTMD	Joint Theatre Missile Defence
2040	JTN	Johnston Atoll (ISO 3166 trigram; obsolete 1986)
2041	JUGFET	JUnction Gate Field-Effect Transistor
2042	JUICE	JUpiter ICy Moon Explorer
2043	JUO	Joint Urban Operations
2044	JV	Joint Venture,Junior Varsity
2045	JW	Jehovah's Witnesses
2046	JWARS	Joint Warfare System (simulation)
2047	JWP	Joint Warfare Publication
2048	JY	Japanese Yen
2049	JZ	Joint Zone
2050	K	Kelvin,Potassium (Latin Kalium),Tanker (aircraft designation code)
2051	k	Kilo-
2052	K	picokelvin
2053	K9	Canine Police Unit
2054	Ka	Kamov Design Bureau
2055	kA	Kiloampere
2056	KA	Knowledge Acquisition,Karnataka (Indian state code)
2057	KAF	Kandahar Air Field
2058	KANUKOKA	Kalaallit Nunaanni Kommunit Kattuffiannit (Kalaallisut, Greenlandic Communities Association
2059	KARNAC	Knowledge Aided Retrieval in Activity Context
2060	KARR	Knight Automated Roving Robot (Knight Rider character)
2061	KATUSA	Korean Augmentation To United States Army
2062	KAZ	Kazakhstan (ISO 3166 trigram)
2063	KBE	Knight Commander of the Order of the British Empire
2064	KBO	Kuiper Belt Object
2065	KBVB	Koninklijke Belgische Voetbalbond (Dutch for Royal Belgian Football Association)
2066	kC	Kilocoulomb
2067	KCK	Kansas City,Kansas,Koma Civakên Kurdistan (Kurdish, Union of Communities in Kurdistan)
2068	KCL	King's College London
2069	KCMO	Kansas City,Missouri (pronounced: K-C-Moe)
2070	KCS	Kansas City Southern Railway (AAR reporting mark)
2071	KD	Kawasaki Disease,Kraft Dinner
2072	KE	Kenya (ISO 3166 digram),Kinetic Energy,Knowledge Engineering
2073	KEDO	Korean Peninsula Energy Development Organization
2074	KEN	Kenya (ISO 3166 trigram)
2075	KERA	Kentucky Education Reform Act (of 1990)
2076	kerma	Kinetic Energy Released in MAterial / in MAtter / per unit MAss
2077	KESR	Kent and East Sussex Railway.
2078	KET	Kentucky Educational Television,Key English Test
2079	kF	Kilofarad
2080	KFC	Kentucky Fried Chicken
2081	KFOR	UN Kosovo Force
2082	KFUPM	King Fahd University of Petroleum & Minerals
2083	KG	Kyrgyzstan (ISO 3166 digram)
2084	KGO	Knight of the Guelphic Order of Hanover
2085	KGZ	Kyrgyzstan (ISO 3166 trigram)
2086	KH	Cambodia (ISO 3166 digram)
2087	kH	Kilohenry
2088	KHL	Kontinental Hockey League
2089	KHM	Cambodia (ISO 3166 trigram)
2090	KHz	Kilohertz
2091	Ki	Kibi
2092	KI	Kiribati (ISO 3166 digram)
2093	KIA	Killed In Action
2094	KIDS	Knowledge-based Integrated Design System
2095	KIR	Kiribati (ISO 3166 trigram)
2096	KISS	Keep It Simple,Stupid / Keep It Short and Simple,Korean Intelligence Support System
2097	KIT	Keep In Touch
2098	KITECH	Korean Institute of Industrial Technology
2099	KITT	Knight Industries Two Thousand, Knight Industries Three Thousand
2100	kJ	Kilojoule
2101	kK	Kilokelvin
2102	KKK	Ku Klux Klan
2103	kL	Kilolitre
2104	KLENOT	KLEť Observatory Near Earth and Other unusual objects observations Team and Telescope
2105	KLOC	Kilo Lines Of Code
2106	KM	Comoros,Knowledge Management
2107	kN	Kilonewton
2108	KNA	Saint Kitts and Nevis (ISO 3166 trigram)
2109	KNVB	Koninklijke Nederlandse Voetbal Bond (Dutch for Royal Dutch Football Association)
2110	KO	Knocked Out
2111	KOR	Republic of Korea (ISO 3166 trigram)
2112	KP	Kim Possible
2113	KPMG	Klynveld,Peat,Marwick,Goerdeler
2114	KPNO	Kitt Peak National Observatory
2115	KQ	Kenya Airways (IATA airline designator)
2116	KR	Kiribati (FIPS 10-4 country code), Republic of Korea (ISO 3166 digram)
2117	Kr	Krypton
2118	KS	Kansas (postal symbol)
2119	kS	Kilosiemens
2120	KSC	Kennedy Space Center
2121	KSI	Killed or Seriously Injured
2122	KSU	Kansas State University
2123	KT	Knight of the Order of the Thistle, Knights Templar
2124	kT	Kilotesla
2125	KTS	Knight of the Tower and Sword (of Portugal)
2126	KUW	Kuwait (UNDP country code,IOC and FIFA trigram,but not ISO 3166)
2127	kV	Kilovolt
2128	KV	Kosovo
2129	kW	Kilowatt
2130	KW	Kuwait (ISO 3166 digram)
2131	KWB	Kids' WB!
2132	KWT	Kuwait (ISO 3166 trigram)
2133	KX	Cayman Airways (IATA airline designator)
2134	KY	Cayman Islands (ISO 3166 digram), Kentucky (postal symbol)
2135	KZ	Kazakhstan (ISO 3166 digram)
2136	KZN	KwaZulu-Natal
2137	La	Lanthanum
2138	LA	Laos (ISO 3166 digram), Louisiana (postal symbol), Los Angeles
2139	LAAS	Local Area Augmentation System, Los Angeles Astronomical Society
2140	LAB	Logistics Assault Base
2141	LabVIEW	Laboratory Virtual Instrumentation Engineering Workbench
2142	LACMA	Los Angeles County Museum of Art
2143	LAD	Laser Aiming Device
2144	LADW	Local Air Defence Warning
2145	LAESI	Local Authority & Emergency Service Information
2146	LANL	Los Alamos National Laboratory
2147	LAO	Laos (ISO 3166 trigram)
2148	LAR	Light Armoured Reconnaissance, Logistics Assistance Representative
2149	LARC	Livermore Advanced Research Computer (cf. LLNL)
2150	LARP	Live-Action Role-Playing
2151	Laser	Light Amplification by Stimulated Emission of Radiation (cf. Maser)
2152	LAT	Lowest Astronomical Tide (nautical charts),Licensed Athletic Trainer (used in many of the United States; see www.oata.org)
2153	LATA	Local Access Transport Area
2154	LATCH	Lower Anchors and Tethers for Children (U.S. standard for attachment points for child safety seats in passenger cars)
2155	LAV	Land Assault Vehicle, Light Armoured Vehicle, Lymphadenopathy-Associated Virus
2156	LAW	Light Antitank Weapon
2157	LAX	Los Angeles International Airport, The Latin American Xchange (professional wrestling)
2158	LB	Lebanon (ISO 3166 digram)
2159	LBH	Light Battlefield Helicopter, Lyman-Birge-Hopfield bands
2160	LBJ	Lady Bird Johnson,LeBron James,Light Bulb Joke,Little Beagle Johnson (the dog owned by Lyndon and Lady Bird Johnson),Lyndon Baines Johnson
2161	LBN	Lebanon (ISO 3166 trigram)
2162	LBNL	Lawrence Berkeley National Laboratory
2163	LBR	Liberia (ISO 3166 trigram)
2164	LBS	Location-Based Services
2165	LBT	Large Binocular Telescope
2166	LBW	Leg Before Wicket
2167	LBY	Libya (ISO 3166 trigram)
2168	LCA	Saint Lucia (ISO 3166 trigram)
2169	LCC	Land Component Commander
2170	LCCP	Light Contingency Communications Package
2171	LCD	Liquid Crystal Display
2172	LCM	Least/Lowest Common Multiple
2173	LCS	League of Legends Championship Series
2174	LDA	Lateral Drift Apparatus (paratroops)
2175	LDC	Lesser Developing/Developed Country
2176	LDL	Low-Density Lipoprotein
2177	LDV	Local Defence Volunteers (British Home Guard)
2178	LDW	Lane Departure Warning (ADAS)
2179	LEC	Local Exchange Carrier
2180	LED	Light-Emitting Diode
2181	LEGAD	Legal Advice
2182	Legs	level emotion gad speed
2183	LEMOSS	Long-Endurance MObile Submarine Simulator
2184	LEN	Large Extension Node
2185	LEP	Large Electron-Positron collider
2186	LER	Loss-Exchange Ratio
2187	LEU	Low-Enriched Uranium
2188	LF	Low Frequency
2189	LFO	Low Frequency Oscillation / Oscillator
2190	LFTR	Liquid fluoride thorium reactor
2191	LGB	Lesbian,Gay,Bisexual
2192	LGBT	Lesbian,Gay,Bisexual,Transgender
2193	LGBTQ	Lesbian,Gay,Bisexual,Transgender,Queer
2194	LGLO	Love God,Love Others
2195	LGM	Little Green Men
2196	LGS	Landsat Ground Station
2197	LH	Luteinising Hormone
2198	LHC	Large Hadron Collider
2199	LHS	Left Hand Side
2200	LI	Fifty-one (in Roman numerals),Liechtenstein (ISO 3166 digram)
2201	Li	Lithium
2202	LIBOR	London Interbank Offered Rate
2203	LIBS	Laser Induced Breakdown Spectroscopy
2204	LIE	Liechtenstein (ISO 3166 trigram)
2205	LIGO	Laser Interferometer Gravitational-Wave Observatory
2206	LINEAR	Lincoln Near-Earth Asteroid Research
2207	LISA	Laser Interferometer Space Antenna
2208	LIVE	Liquid Inertial Vibration Eliminator
2209	LJJ	Lord Justices of Appeal
2210	LK	Sri Lanka (ISO 3166 digram)
2211	LKA	Sri Lanka (ISO 3166 trigram)
2212	LKR4	Linkwitz-Riley 4th order (audio crossover type)
2213	LLAD	Low Level Air Defence
2214	LLB	Legum Baccalaureus (Latin: Bachelor of Laws)
2215	LLC	Limited Liability Company
2216	LLLTV	Low-Light Level Television
2217	LLNL	Lawrence Livermore National Laboratory
2218	LLP	Limited Liability Partnership
2219	LLTR	Low-Level Transit Route
2220	LMAO	Laughing My Ass Off (Internet shorthand)
2221	LMB	Lick My Balls
2222	LMFAO	Laughing My F**king Ass Off (Internet shorthand,electro-hop duo)
2223	LMN	Lifetime Movie Network
2224	LMS	Like My Status (Internet shorthand)
2225	LMV	() Light Motor Vehicle
2226	LNER	London and North Eastern Railway
2227	LNG	Liquefied Natural Gas
2228	LNO	Liaison Officer
2229	LNR	Ligue Nationale de Rugby (French for: 'National Rugby League')
2230	LOA	Limit Of Advance
2231	LOC	Level of Operational Capability, Limited Operational Capability
2232	LOD	Limit of Detection,see Detection limit
2233	LoD	Lines of Development (UK)
2234	LOE	Level of Effort
2235	LOFAR	Low Frequency Analysis and Recording
2236	LOGPAC	Logistics Package
2237	LOL	Laughing Out Loud (Internet shorthand)
2238	LOMEZ	Low Altitude Missile Engagement Zone
2239	LONEOS	Lowell Observatory Near-Earth-Object Search
2240	LOOGY	Lefty One-Out GuY,a sometimes pejorative nickname for the left-handed specialist in baseball
2241	LORTID	LOng Range Target IDentification
2242	LOS	Line Of Sight
2243	LOSAT	Line-Of-Sight Anti-Tank (missile)
2244	LOTA	Licentiate of the Orthodontic Technicians Association
2245	LOTIS	Livermore Optical Transient Imaging System
2246	LOTS	Logistics Over-The-Shore
2247	LP	Linkin Park,Linkup Point,Listening Post,Long Playing record,Louisiana Pacific (cf. LP Field)
2248	LPC	Linear Predictive Coding
2249	LPD	Landing Platform Dock (Navy hull classification),Low Probability of Detection
2250	LPG	Liquefied Petroleum Gas (cf. LNG)
2251	LPI	Low Probability of Intercept
2252	LPS	Landsat Processing System,LipoPolySaccharide
2253	Lr	Lawrencium
2254	LR	Liberia (ISO 3166 digram)
2255	LRC	Logistics iness Center
2256	LRGW	Long-Range Guided Weapon
2257	LRICBM	Limited Range ICBM
2258	LRIP	Low Rate Initial Production
2259	LRP	Logistics Release Point
2260	LRPE	Long-Range Planning Element
2261	LRS	Long Range Surveillance
2262	LRU	Line-Replaceable Unit
2263	LSAT	Law School Admission Test (often pronounced as 'el-SAT')
2264	LSI	Large-Scale Integration
2265	LSIF	Labour Sponsored Investment Fund
2266	LSND	Liquid Scintillator Neutrino Detector
2267	LSO	Lesotho (ISO 3166 trigram)
2268	LSST	Large Synoptic Survey Telescope
2269	LST	Landing Ship,Tank (World War II; also known,not entirely affectionately,as 'Large Slow Target')
2270	LSVW	Light Support Vehicle,Wheeled
2271	LT	Lithuania (ISO 3166 digram)
2272	Lt	Lieutenant
2273	LtC	Lieutenant-Colonel (U.S.)
2274	LTC	Long-Term Costing
2275	Ltd	Limited
2276	LTDP	Long-Term Defence Plan
2277	LTG	Lieutenant General,Lightning (METAR Code)
2278	LTI	Linear Time-Invariant
2279	LTM	Acronym for Laughing To Myself
2280	LTP	Long-Term Potentiation
2281	LTU	Lithuania (ISO 3166 trigram)
2282	LU	Acronym Love You
2283	LU	Loonatics Unleashed
2284	Lu	Lutetium
2285	LUCA	Last Universal Common Ancestor
2286	LUG	Linux User Group
2287	LULU	Locally Unwanted Land Use (urbanism)
2288	LUT	Limited User Test (ing),Local User Terminal
2289	LUVW	Light Utility Vehicle,Wheeled
2290	LUX	Luxembourg (ISO 3166 trigram)
2291	LV	Las Vegas,Latvia (ISO 3166 digram),Launch Vehicle,Leading Vehicle,Leave,Left Ventricle,Level Valve,Linking Verb,Liverpool Victoria
2292	LVA	Latvia (ISO 3166 trigram)
2293	LVAD	Left Ventricular Assist Device,Low-Velocity Airdrop
2294	LVEF	Left Ventricular Ejection Fraction
2295	LW	Land Warrior,Low Water (nautical charts)
2296	Lw	Lawrencium (obsolete 1963)
2297	LWR	Laser warning receiver
2298	LWRC	Land Warfare Resources Corporation
2299	LWS	Land Warrior System
2300	LX	Electrics (theatrical term)
2301	LX	Luxembourg (amateur radio ITU prefix),Swiss International Air Lines (IATA code)
2302	LY	Libya (ISO 3166 digram),Lithuania (amateur radio ITU prefix)
2303	LYAO	Laugh Your Ass Off
2304	LYLAS	Love You Like A Sister
2305	LZ	Bulgaria (amateur radio ITU prefix),Landing Zone
2306	M	Mega-,One thousand (in Roman numerals)
2307	m	Metre,Milli
2308	MA	Marijuana Anonymous,Master of Arts,Massachusetts (postal symbol),Megaampere,Morocco (ISO 3166 digram)
2309	Ma	Megaannum
2310	mA	Milliampere
2311	MAA	Mathematical Association of America
2312	MAAC	Metro Atlantic Athletic Conference
2313	MACE	Multi-Agent Computing Environment
2314	MACHO	MAssive Compact Halo Object
2315	MADD	Mothers Against Drunk Driving,MyoAdenylate Deaminase Deficiency,Multiply-Add
2316	MAF	Maintenance Action Form
2317	MAGA	Make America Great Again
2318	MAGIC	Major Atmospheric Gamma-ray Imaging Cherenkov (telescope)
2319	MAGNETAR	Metaprogrammable AGent NETwork ARchitecture
2320	MAGTF	Marine Air-Ground Task Force
2321	Mahasz	Magyar Hanglemezkiadók Szövetsége (Hungarian for: 'Association of Hungarian Record Companies')
2322	MALD	Miniature Air-Launched Decoy
2323	MANPADS	MAN-Portable Air Defence System
2324	MANPRINT	MANpower and PeRsonnel INTegration
2325	MAO	Molėtų astronomijos observatorija (Moletai Astronomical Observatory),MonoAmine Oxidase
2326	MAOI	Monoamine oxidase inhibitor
2327	MAPS	Monitoring Avian Productivity and Survivorship
2328	MAR	Morocco (ISO 3166 trigram)
2329	MarBEF	Marine Biodiversity and Ecosystem Functioning
2330	MARCENT	United States Marine Forces Central Command
2331	MARFORCC	Marine Force Component Commander
2332	MASAS	Monte Agliale Supernovae and Asteroid Survey
2333	Maser	Microwave Amplification by Stimulated Emission of Radiation
2334	MASH	Mobile Army Surgical Hospital
2335	MASINT	Measurement And Signature Intelligence
2336	MAVS	Mobile Artillery Vehicle System
2337	MB	Manitoba (postal symbol),Medal of Bravery (Canada)
2338	MBA	Main Battle Area,Main Belt Asteroid,Masters of Business Administration
2339	MBBL	(U.S. Armor Center) Mounted Battlespace Battle Laboratory
2340	MBCC	Migratory Bird Conservation Commission (U.S.)
2341	MBCS	Multi-Byte Character Set
2342	MBI	Moody Bible Institute
2343	MBIDST	Member of the British Institute of Dental and Surgical Technologists
2344	MBM	Meat and Bone Meal
2345	MBT	Main Battle Tank
2346	MBTI	Myers-Briggs Type Indicator
2347	mC	Millicoulomb
2348	MCDL	Model Composition Definition Language
2349	MCFT	Modified Compression Field Theory
2350	MCG	Melbourne Cricket Ground
2351	MCIS	Mellon Collie and the Infinite Sadness
2352	MCM	Mine Counter-Measures
2353	MCMV	Mine Counter-Measure Vessel
2354	MCR	My Chemical Romance
2355	MCSF	Marine Corps Security Forces
2356	MCT	Movement Control Team
2357	MCTIS	Mounted Co-operative Target Identification System
2358	Md	Mendelevium
2359	MDNA	Madonna's 12th studio album title (2012)
2360	MDO	Membership Driven Organisation
2361	MDP	Markov Decision Process
2362	MDT	Mountain Daylight Time (UTC-6 hours)
2363	MDV	Maldives (ISO 3166 trigram)
2364	Me	Messerschmitt
2365	MEAC	Mid-Eastern Athletic Conference (ME-ac)
2366	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)
2367	MEDEVAC	Medical evacuation
2368	MEDS	Mission Essential Data Set
2369	MEG	MagnetoEncephaloGraphy
2370	MELT	Metallic Line/Loop Test (ing)
2371	MEMS	Microelectromechanical System
2372	MER	Mars Exploration Rover
2373	MERL	Mitsubishi Electric Research Laboratories
2374	MES	Manufacturing Execution Systems
2375	METAR	[Meteorological] Aviation Routine weather report
2376	METOC	Meteorological and Oceanographic
2377	MeV	Megaelectronvolt
2378	MEX	Mexico (ISO 3166 trigram)
2379	MEZ	Missile Engagement Zone
2380	MF	Megafarad
2381	mF	Millifarad
2382	MG	Machine Gun,Madagascar (ISO 3166 digram),Major General,Morris Garage
2383	MGPAM	My Gym Partner's a Monkey
2384	MGS	Mobile Gun System
2385	mH	Millihenry
2386	MHC	Major Histocompatibility Complex
2387	MHHW	Mean Higher High Water (nautical charts)
2388	MHL	Marshall Islands (ISO 3166 trigram)
2389	MHLW	Mean Higher Low Water (nautical charts)
2390	MHRA	(UK) Medicines and Healthcare products Regulatory Agency
2391	MHW	Mean High Water (nautical charts)
2392	MHWN	Mean High Water Neaps (nautical charts)
2393	MHWS	Mean High Water Springs (nautical charts)
2394	MHz	Megahertz
2395	Mi	Mebi
2396	MIA	Missing In Action
2397	MICLIC	Mine Clearing Line Charge
2398	MICOM	Missile Command
2399	MID	Midway Islands (ISO 3166 trigram; obsolete 1986)
2400	MIDAS	Man-machine Integration Design and Analysis System
2401	MIDI	Musical Instrument Digital Interface
2402	MIDS	Multi-Function Information Distribution System
2403	MIFG	Shallow Fog (METAR Code)
2404	MIKE	Monitoring of Illegal Killing of Elephants
2405	MIL	Man-In-the-Loop
2406	MILC	Mirrorless interchangeable-lens camera
2407	MILF	Mother I'd Like to Fuck
2408	MIMOSA	MIcroMeasurements Of Satellite Acceleration
2409	MIMPT	Member of the Institute of Maxillofacial Prosthetists and Technologists
2410	MIRA	MILAN Infra-Red Acquisition (thermal sight)
2411	MIRV	Multiple Independent Reentry Vehicle
2412	MISREP	Mission Report
2413	MISSI	Multilevel Information System Security Initiative
2414	MITL	Man-In-The-Loop
2415	MITS	see entry
2416	mJ	Millijoule
2417	MJD	Modified Julian Day
2418	mK	Millikelvin
2419	MKG	Michael Kidd-Gilchrist (American basketball player)
2420	MKSA	Metre-Kilogram-Second-Ampere (system of units)
2421	mL	Millilitre
2422	MLB	Major League Baseball
2423	MLC	Member of the Legislative Council (in India)
2424	MLE	Maximum likelihood estimation
2425	MLHW	Mean Lower High Water (nautical charts)
2426	MLI	Mali (ISO 3166 trigram)
2427	MLL	Major League Lacrosse
2428	MLLW	Mean Lower Low Water (nautical charts)
2429	MLP	My Little Pony
2430	MLRS	Multiple-Launch Rocket System
2431	MLT	Malta (ISO 3166 trigram)
2432	MLW	Mean Low Water (nautical charts)
2433	MLWN	Mean Low Water Neaps (nautical charts)
2434	MLWS	Mean Low Water Springs (nautical charts)
2435	Mm	Megametre
2436	mm	Millimetre
2437	MMEV	Multi-Mission Effects Vehicle
2438	MMI	Magical MonkeyZ Inc.
2439	MMI	Man-Machine Interface
2440	MMI	McLean Meditation Institute
2441	MMIC	McLean Meditation Institute Certified
2442	MMO	Massively Multiplayer Online (computer game)
2443	MMOR	Master of Management in Operations Research
2444	MMORPG	Massively multiplayer online role-playing game
2445	MMPR	Mighty Morphin Power Rangers
2446	MMS	Multimission Modular Spacecraft
2447	Mn	Manganese
2448	mN	Millinewton
2449	MNB	Multinational Brigade
2450	MNE	Montenegro (ISO 3166 trigram)
2451	MNMF	Multi-National Maritime Force
2452	MNP	Northern Mariana Islands (ISO 3166 trigram)
2453	MNS	Mission Needs Statement
2454	Mo	Molybdenum
2455	MOA	Museum of Art (Brigham Young University)
2456	MOCAS	Mechanization Of Contract Administration Services
2457	MoD	Ministry of Defence (United Kingdom) and various other countries
2458	modem	Modulator-Demodulator
2459	Moe	Marvel of entertainment
2460	MOE	Measure Of Effectiveness
2461	MOF	Ministry of Finance (Japan)
2462	MOFA	Ministry of Foreign Affairs (Japan)
2463	MOID	Minimum Orbital Intersection Distance
2464	MOJWA	Movement for Oneness and Jihad in West Africa
2465	MOLO	Mobile Other Licensed Operator (UK)
2466	MOM	Master's Degree in Oriental medicine
2467	MOM	Message Oriented Middleware
2468	MoM	Multiple of the median
2469	MoMA	Museum of Modern Art (NYC)
2470	MOND	Modified Newtonian Dynamics
2471	MOO	Measure Of Outcome
2472	MOPP	Mission-Oriented Protective Posture
2473	MORP	Meteorite Observation and Recovery Project
2474	MOSFET	Metal-Oxide-Semiconductor Field-Effect Transistor
2475	MOT	Ministry of Transport (UK)
2476	MOTA	Member of the Orthodontic Technicians Association
2477	MOTESS	Moving Object and Transient Event Search System
2478	MOU	Memorandum Of Understanding
2479	MOW	Maintenance of way (also MW)
2480	MOZ	Mozambique (ISO 3166 trigram)
2481	MPa	Megapascal
2482	mPa	Millipascal
2483	MPAA	Motion Picture Association of America
2484	MPEC	Minor Planet Electronic Circular
2485	MPEG	Motion Pictures (Coding) Experts Group
2486	MPEV	Multi-Purpose Engineering Vehicle
2487	MPF	Maritime Prepositioning Force
2488	MPFC	Medial PreFrontal Cortex
2489	MPG	Miles Per Gallon
2490	MPMC	Medial PreMotor Cortex
2491	MPSI	Member of the Pharmaceutical Society of Ireland
2492	MPSoC	MultiProcessor System-on-Chip
2493	MPSRON	Maritime Propositioning Ship Squadron
2494	MR	Mauritania (ISO 3166 digram)
2495	MRAV	Multi-Role Armoured Vehicle
2496	MRBM	Medium Range Ballistic Missile
2497	MRC	Maintenance Requirements Card
2498	MRD	Motorized Rifle Division
2499	MRGW	Medium-Range Guided Weapon
2500	MRI	Magnetic Resonance Imaging
2501	MRL	Multiple Rocket Launcher
2502	MRPharmS	Member of the Royal Pharmaceutical Society (Great Britain)
2503	MRS	Magnetic Resonance Spectroscopy
2504	MRSA	Methicillin-resistant Staphylococcus aureus
2505	MRTFB	U.S. Major Range and Test Facility Base
2506	Ms	Megasecond
2507	mS	Millisiemens
2508	MSD	Minimum Safe Distance
2509	MSDB	Multi Source Data Base
2510	MSE	Multiple Subscriber Element
2511	MSG	Message
2512	MSLP	Mean Sea Level Pressure
2513	MSNBC	Microsoft National Broadcasting Company Cable news channel (see also msnbc.com)
2514	MSO	Multiple System Operator
2515	MSPB	Merit Systems Protection Board
2516	MSSA	Methicillin-susceptible Staphylococcus aureus
2517	Mt	Meitnerium
2518	mT	Millitesla
2519	MTBF	Mean Time Between Failures
2520	MtF	Male-to-female transsexual
2521	MTG	Magic: The Gathering
2522	MTQ	Martinique (ISO 3166 trigram)
2523	MTT	Methylthiazol tetrazolium (assay)
2524	MTTF	Mean Time To Failure
2525	MTTR	Mean Time To Recover
2526	MTWS	MAGTF Tactical Warfare System
2527	MUS	Mauritius (ISO 3166 trigram)
2528	mV	Millivolt
2529	MVC	Missouri Valley Conference
2530	MVFC	Missouri Valley Football Conference
2531	MVNO	Mobile virtual network operator
2532	mW	Milliwatt
2533	MWESH	Machismo Wizards Extended SHelter (operating system)
2534	MWI	Malawi (ISO 3166 trigram)
2535	MWOA	Mount Wilson Observatory Association
2536	MWTB	Mounted Warfare Test Bed
2537	MY	Malaysia (ISO 3166 digram)
2538	MYOB	Mind Your Own Business
2539	MYS	Malaysia (ISO 3166 trigram)
2540	MYT	Mayotte (ISO 3166 trigram)
2541	n	Nano
2542	N/A	Not Available, Not Applicable, or: No Answer
2543	N3F	National Fantasy Fan Federation
2544	nA	Nanoampere
2545	Na	Sodium (Latin Natrium)
2546	NAA	N-Acetylaspartate
2547	NAAD	North American Air Defense
2548	NAAQS	National Ambient Air Quality Standards
2549	NAAWS	NATO Anti-Air Warfare System
2550	NAC	National Agency Check,U.S. Naval Avionics Center,U.S. Navy Advanced Concepts,North Atlantic Council,Northern Area Command
2551	NACC	North Atlantic Cooperation Council
2552	NACISA	NATO Communications and Information Systems Agency
2553	NACMA	NATO Air Command and Control System Management Agency
2554	NACRA	North America Caribbean Rugby Association (more specifically rugby union)
2555	NAEC	U.S. Naval Air Engineering Center
2556	NAFERA	Native American Free Exercise of Religion Act
2557	NAFLD	NonAlcoholic Fatty Liver Disease
2558	NAFO	Northwest Atlantic Fisheries Organization
2559	NAFTA	North American Free Trade Agreement
2560	NAGPRA	Native American Graves Protection and Repatriation Act
2561	NAICS	North American Industry Classification System
2562	NAIL	Neurotics Anonymous
2563	NAILS	National Airspace Integrated Logistics System
2564	NAIRU	Non Accelerating Inflation Rate of Unemployment
2565	NAK	Negative Acknowledge
2566	NAM	Namibia (ISO 3166 trigram)
2567	NAMBLA	North American Man-Boy Love Association
2568	NAMRL	Naval Aerospace Medical Research Laboratory
2569	NaN	Not A Number (computing)
2570	NAO	UK National Audit Office
2571	NAPS	Navy Acquisition Procedures Supplement
2572	NARA	(U.S.) National Archives and Records Administration
2573	NARAL	National Abortion Rights Action League
2574	NARDAC	Naval Regional Data Automation Center
2575	NARDIC	U.S. Navy Acquisition Research and Development Information Center
2576	NARPV	National Association for Remotely Piloted Vehicles
2577	NASCAR	National Association for Stock Car Auto Racing
2578	NASDAQ	National Association of Securities Dealers Automated Quotations
2579	NASED	National Association of State Election Directors [1][2]
2580	NASH	Non-Alcoholic Steatohepatitis
2581	NASP	National Aerospace Plane
2582	NASS	National Association of Secretaries of State [3]
2583	NatGeo	National Geographic
2584	NaUKMA	National University of Kyiv-Mohyla Academy
2585	NAV	Navigation[al]
2586	NAVCAMS	Naval Communications Area Master Station
2587	NAVCC	National Audio-Visual Conservation Center
2588	NAVCENT	Naval Forces U.S. Central Command
2589	NAVDAC	Naval Data Automation Command
2590	NAVEUR	Naval Forces U.S. European Command
2591	NAVFOR	Naval Force
2592	NAVMACS	Naval Modular Automatic Communication Subsystem
2593	NAVNET	Navy Network
2594	NAVS	Non-Cooperative Airborne Vector Scoring
2595	NAVSAT	Navigation Satellite
2596	NAVSPACECOM	U.S. Navy Space Command
2597	NAVSPASUR	U.S. Naval Space Surveillance System
2598	NAVSTAR	Navigation Satellite Timing And Ranging
2599	NAVTACNET	Navy Tactical Network
2600	NAWC	U.S. Naval Air Warfare Center
2601	Nb	Niobium
2602	NBA	National Basketball Association
2603	NBL	National Basketball League (Australia)
2604	NBT	Nitroblue tetrazolium (assay)
2605	nC	Nanocoulomb
2606	NCA	National Command Authority
2607	NCAR	U.S. National Center for Atmospheric Research
2608	NCB	National Codification Bureau
2609	NCCAM	U.S. National Center for Complementary and Alternative Medicine
2610	NCCUSL	National Conference of Commissioners on Uniform State Laws (U.S.)
2611	NCDDR	U.S. National Center for the Dissemination of Disability Research
2612	NCI	U.S. National Cancer Institute
2613	NCL	New Caledonia (ISO 3166 trigram)
2614	NCLR	National Council of La Raza
2615	NCMO	No Commitment Make Out
2616	NCO	Non-Commissioned Officer
2617	NCP	Net Contracted Purchases
2618	NCR	National Cash Register Co.
2619	NCTR	Non-Co-operative Target Recognition
2620	NCW	Network Centric Warfare
2621	Nd	Neodymium
2622	NDAA	U.S. National Defense Authorization Act
2623	NDBP	Non-Departmental Public Body (Scotland)
2624	NDP	New Democratic Party (Canada)
2625	NDS	Nintendo DS
2626	Ne	Neon
2627	NECTEC	National Electronics and Computer Technology Center (Thailand)
2628	NEMS	National Energy Modeling System (USDOE-EIA)
2629	NEPA	National Environmental Policy Act
2630	NER	Niger (ISO 3166 trigram)
2631	NERICA	New Rice for Africa
2632	NESP	NSA/CSS Enterprise Standards Program
2633	NET	National Educational Television
2634	NETCU	(UK) National Extremism Tactical Co-ordination Unit
2635	NETL	(US) National Energy Technology Laboratory
2636	NETWARS	Network Warfare Simulation
2637	NEX	Navy EXchange
2638	nF	Nanofarad
2639	NF	Norfolk Island (ISO 3166 digram)
2640	NFER	National Foundation for Educational Research
2641	NFG	No Fucking Good
2642	NFHS	National Federation of State High School Associations
2643	NFI	Not F****** Interested
2644	NFK	Norfolk Island (ISO 3166 trigram)
2645	Nfld	Newfoundland
2646	NFPA	National Fluid Power Association (United States)
2647	NFT	No Further Text
2648	NGA	U.S. National Geospatial-Intelligence Agency, Nigeria (ISO 3166 trigram)
2649	NGATS	New Generation Army Targetry System
2650	NGH	Northern General Hospital
2651	NGO	non-governmental organization
2652	NGS	Naval Gunfire Support
2653	nH	Nanohenry
2654	NHANES	National Health and Nutrition Examination Survey
2655	NHB	New Hebrides (ISO 3166 trigram; obsolete 1980)
2656	NHB	No Holds Barred radio (Link)
2657	NHL	National Hockey League
2658	NHRA	National Hot Rod Association
2659	NHS	National Health Service (UK)
2660	Ni	Nickel
2661	NIAAA	U.S. National Institute on Alcohol Abuse and Alcoholism
2662	NIAG	NATO Industrial Advisory Group
2663	NIAID	National Institute of Allergies and Infectious Disease
2664	NIAMD	National Institute of Arthritis and Musculoskeletal Diseases
2665	NIB	New In Box (Internet auction/trading listings)
2666	NIBP	Non-invasive blood pressure monitor
2667	NicA	Nicotine Anonymous
2668	NICAP	National Investigations Committee on Aerial Phenomena
2669	NICE	UK. National Institute for Health and Clinical Excellence
2670	NICHD	National Institute of Child Health and Human Development [4]
2671	NICP	National Inventory Control Point
2672	NIDDK	National Institute of Diabetes and Digestive and Kidney Diseases
2673	NIDRR	National Institute on Disability Research and Rehabilitation
2674	NIEHS	National Institute of Environmental Health Sciences
2675	NIIN	National Item Identification Number
2676	NIMA	National Imagery and Mapping Agency (became NGA)
2677	NIMBY	Not In My Back Yard (See NOME)
2678	NIMG	Not In My Generation
2679	NIN	Nine Inch Nails (band)
2680	NIPR	National Institute of Polar Research (Japan)
2681	NIR	Northern Ireland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
2682	NISAC	U.S. National Infrastructure Simulation and Analysis Center
2683	NISCAP	NSA Information System Certification and Accreditation Program
2684	NISER	National Institute of Science Education and Research
2685	NIST	National Institute of Standards and Technology
2686	NITFS	National Imagery Transmission Format Standard
2687	NIU	Niue (ISO 3166 trigram)
2688	nJ	Nanojoule
2689	NJ	New Jersey (postal symbol)
2690	NJHS	National Junior Honor Society
2691	NJPW	New Japan Pro Wrestling
2692	nK	Nanokelvin
2693	NKA	No Known Allergies
2694	nL	Nanolitre
2695	NLB	Non-Linear Battlefield
2696	NLD	Netherlands (ISO 3166 trigram)
2697	NLF	National Liberation Front (disambiguation)
2698	NLL	National Lacrosse League
2699	NLP	Natural Language Processing,Neuro-Linguistic Programming (pseudoscience)
2700	NLRB	National Labor Relations Board
2701	NLW	Non-Lethal Weapon
2702	nm	Nanometre
2703	NM	New Mexico (postal symbol)
2704	NMCI	Navy Marine Corps Intranet
2705	NMCS	Not Mission Capable Supply (SM&R code)
2706	NMD	U.S. National Missile Defense
2707	NMHNFG	Not Made Here,No Fucking Good
2708	NMN	No middle name
2709	NMR	Nuclear Magnetic Resonance
2710	NMSG	NATO Modelling and Simulation Group
2711	nN	Nanonewton
2712	NNE	North North-East
2713	NNSA	U.S. National Nuclear Security Administration
2714	NNW	North North-West
2715	NO	Nitric Oxide,Normally Open,Norway (ISO 3166 and FIPS 10-4 country code digram)
2716	No	Nobelium
2717	NOAA	U.S. National Oceanic and Atmospheric Administration
2718	NOAF	Norwegian Air Force
2719	NOAO	National Optical Astronomy Observatory
2720	NOC	UK. National Oceanography Centre
2721	NODEF	NATO Oceanographic Data Exchange Format
2722	NOGI	New Orleans Grande Isle (award for diving)
2723	NOLA	New Orleans,Louisiana (LA is the official postal code for Louisiana)
2724	NOLF	Navy OutLying Field
2725	NoMBO	Non-mine,Mine-like Bottom Object
2726	NOME	Not on Mars Either
2727	NOME	Not on Mars Either (see NIMBY)
2728	NOPA	National Office Products Alliance,National Office Products Association
2729	NOR	Norway (ISO 3166 trigram)
2730	NORELPREF	No religious preference
2731	NORTHAG	Northern Army Group
2732	NOS	Network Operating System,New Old Stock (Internet auction/trading listings),Nitric Oxide Synthase (enzyme)
2733	NOSA	NATO OSI Security Architecture
2734	NOTAFLOF	No One Turned Away For Lack Of Funds
2735	NOW	National Organization for Women
2736	NP	National Permit,A permit in India for trucks so they can go anywhere in the nation
2737	Np	Neap tide (nautical charts),Neptunium
2738	NP	Nepal (ISO 3166 and FIPS 10-4 country code digram)
2739	NPB	Nippon Professional Baseball
2740	NPC	National Postgraduate Committee,National Provincial Championship (New Zealand rugby competition,now defunct),Navigation Planning Chart
2741	NPCS	Non-Passenger Coaching stock (in Railways)
2742	NPD	Nationaldemokratische Partei Deutschlands (German)
2743	NPDI	New Product Development and Introduction
2744	NPG	Needline/Network Participation Group
2745	NPH	Normal Pressure Hydrocephalus
2746	NPL	National Priorities List,Nepal (ISO 3166 trigram)
2747	NPO	nothing by mouth
2748	NPOV	Neutral Point Of View
2749	NQ	Dronning Maud Land (ISO 3166 digram; obsolete 1983)
2750	NQOCD	Not Quite Our Class,Dear (or Darling). (Upper-class English slang)
2751	NR	Nauru (ISO 3166 and FIPS 10-4 country code digram)
2752	NRA	National Rifle Association
2753	NRAO	National Radio Astronomy Observatory
2754	NRC	(U.S.) National Research Council,Nuclear Regulatory Commission (U.S.)
2755	NRDC	(U.S.) Natural Resources Defense Council
2756	NREL	(U.S.) National Renewable Energy Laboratory
2757	NRK	Norsk Rikskringkasting (Norwegian Broadcasting Corporation)
2758	NRMP	National Resident Matching Program (U.S. medicine)
2759	NRO	(U.S.) National Reconnaissance Office
2760	NRT	Near Real Time
2761	NRTA	National Rat Terrier Association,National Retail Tenants Association,National Retired Teachers Association,Northwest Regional Transmission Association
2762	NRU	Nauru (ISO 3166 trigram)
2763	ns	Nanosecond
2764	nS	Nanosiemens
2765	NS	Norfolk Southern Railway (AAR reporting mark),Nova Scotia (postal symbol),Suriname (FIPS 10-4 country code)
2766	NSA	Naval Support Activity,No Strings Attached
2767	NSABB	National Science Advisory Board for Biosecurity
2768	NSAID	Non-Steroidal Anti-Inflammatory Drug
2769	NSB	Norges Statsbaner (Norwegian State Railways)
2770	NSC	National Security Council
2771	NSDAP	Nationalsozialistische Deutsche Arbeiterpartei (German: 'German National Socialist Workers Party',the formal name of the Nazi Party)
2772	NSDL	National Science Digital Library (US)
2773	NSG	National System for Geospatial-Intelligence
2774	NSN	National Stock Number
2775	NSNA	National Student Nurses' Association
2776	NSO	National Standardization Office (ABCA)
2777	NSS	(U.S.) Naval Simulation System
2778	NST	(UK) Nimrod Software Team
2779	NSTAC	National Security Telecommunications Advisory Committee
2780	NSV	Nikitin-Sokolov-Volkov heavy machine gun (Russian НСВ Никитина-Соколова-Волкова) ru:ПулеметНСВ-12,7 'Утес'
2781	NSW	New South Wales (postal symbol)
2782	nT	Nanotesla
2783	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)
2784	NTC	National Training Center,Negative Temperature Coefficient (thermistor)
2785	NTDS	Naval Tactical Data System
2786	NTP	Network Time Protocol
2787	NTR	Network Time Reference
2788	NTRA	National Thoroughbred Racing Association
2789	NTSB	National Transportation Safety Board
2790	NTSC	National Television Standards Committee (colloquially,Never Twice the Same Color)
2791	NTV	Non-Tactical Vehicle
2792	NTY	(Internet Abbreviations:) Not Tested Yet; (Alternatively) No Thank You
2793	NTZ	Iraq-Saudi Arabia Neutral Zone (ISO 3166 trigram; obsolete 1993)
2794	NU	Nicaragua (FIPS 10-4 country code),Niue (ISO 3166 digram),Nunavut (postal symbol)
2795	NUL	Null character (ASCII code of control character),National Urban League
2796	NUTS	Nuclear Utilization Target Selection
2797	NUWC	U.S. Naval Undersea Warfare Center
2798	nV	Nanovolt
2799	NVEOL	Night Vision and Electro-Optics Laboratory
2800	NVESD	CERDEC Night Vision and Electronic Sensors Directorate,Fort Belvoir,Virginia
2801	NVG	Night Vision Goggles
2802	NVL	Night Vision Laboratory
2803	nW	Nanowatt
2804	NW	North-West
2805	NW	Nuclear Weapon
2806	NWA	National Wrestling Alliance
2807	NWF	National Wildlife Federation
2808	NWFZ	Nuclear-Weapon-Free Zone
2809	NWHN	U.S. National Women's Health Network
2810	nWo	New World Order (see article for explanation of idiosyncratic capitalization)
2811	NWOAHM	New Wave of American Heavy Metal
2812	NWOBHM	New Wave of British Heavy Metal (sometimes pronounced /n.ˈwɒbm/ as if it were an acronym)
2813	NWRA	National Wildlife Rehabilitators Association
2814	NWSL	National Women's Soccer League (U.S.)
2815	NWT	North-West Territories
2816	NXA	21st arcade game in the Pump It Up series
2817	NXD	Native XML
2818	NXE	New Xbox Experience
2819	NXG	New Cross Gate station
2820	NXL	National XBall League
2821	NXN	Nike Cross Nationals
2822	NY	New York (postal symbol)
2823	NYC	New York City
2824	NYT	New York Times
2825	NYHA	New York Heart Association
2826	NYO	National Youth Orchestra of Great Britain
2827	NYSE	New York Stock Exchange
2828	NZ	New Zealand (ISO 3166 and FIPS 10-4 country code digram)
2829	NZC	New Zealand Cricket
2830	NZL	New Zealand (ISO 3166 trigram)
2831	NzL	Noze looan (online/event listings)
2832	NZOSS	New Zealand Open Source Society
2833	NZRU	New Zealand Rugby Union
2834	OAC	On Approved Credit
2835	OAP	Old Age Pensioner (UK)
2836	OARSI	Osteoarthritis Research Society International
2837	OAS	Organization of American States
2838	OASIS	Ontario Agencies Supporting Individuals with Special Needs
2839	OASIS	Ontario Association of Sewage Industry Services
2840	OASP	Operational Analysis Support Paper/Plan
2841	OAU	Organization for African Unity
2842	OBE	Officer of the Order of the British Empire
2843	OBX	Outer Banks (North Carolina)
2844	OC	Officer Commanding
2845	OCD	Obsessive-Compulsive Disorder
2846	OCFS	Oracle Cluster File System
2847	OCFS2	Oracle Cluster File System Release 2
2848	OCMCC	[2] Orchard County MCC
2849	OCN	Oncology Certified Nurse
2850	OCO	Oort Cloud Object
2851	OCR	Optical Character Recognition
2852	OCS	see entry
2853	ODAS	OCA-DLR Asteroid Survey
2854	ODBC	Open DataBase Connectivity
2855	OEA	(U.S.) Office of Economic Adjustment
2856	OECD	Organisation for Economic Co-operation and Development (international)
2857	OED	Oxford English Dictionary
2858	OEG	Operation Exposure Guidance
2859	OEIS	On-Line Encyclopedia of Integer Sequences
2860	OEM	Original Equipment Manufacturer
2861	OFA	Occipital Face Area
2862	OFDA	U.S Agency for International Development's Office of Foreign Disaster Assistance
2863	OGC	Open Geospatial Consortium
2864	OGD	Other Government Department
2865	OGO	Other Government Organization
2866	OH	Ohio (postal symbol)
2867	OHC	OverHead-Cam engine
2868	OHHLA	Original Hip-Hop Lyrics Archive
2869	OHIP	Ontario Health Insurance Plan
2870	OHMS	On Her (or His) Majesty's Service (also written: O.H.M.S.)
2871	OHP	Observatoire de Haute-Provence
2872	OHSS	Ovarian Hyperstimulation Syndrome
2873	OIC	Officer In Charge
2874	OIF	Operation Iraqi Freedom
2875	OIOC	Oriental & India Office Collections (in the British Library)
2876	OJT	On-the-Job Training
2877	OKC	Oklahoma City
2878	OLED	Organic Light-Emitting Diode
2879	OLS	Operational Linescan System
2880	OMD	Orchestral Manoeuvres in the Dark (1980s pop group)
2881	OME	Osaka Mercantile Exchange
2882	OMFG	Oh My Fucking God
2883	OMG	Oh My God or Or My Gosh
2884	OMGW	Oh My Gosh it's Windy
2885	OMN	Oman (ISO 3166 trigram)
2886	OMNCS	U.S. Office of the Manager for the National Communications System
2887	OMP	Order of Mapungubwe in Platinum
2888	OMS	Order of Mapungubwe in Silver
2889	OMT	Object Model Template
2890	ON	Ontario (postal symbol)
2891	ONC	Orthopaedic Nurse Certified
2892	ONG	Orthodontic National Group
2893	ONI	(U.S.) Office of Naval Intelligence
2894	ONS	Operational Needs Statement
2895	OOAD	Object Oriented Analysis and Design
2896	OOBE	Out-of-body experience
2897	OOCL	Orient Overseas Container Line
2898	OODA	Observation,Orientation,Decision,Action loop (a.k.a. Boyd's Loop)
2899	OOF	Out of Facility
2900	OOMF	One Of My Followers
2901	OOO	Out Of the Office
2902	OOTW	Operations Other Than War
2903	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
2904	OPAC	Online Public Access Catalogue
2905	OPCON	Operational control
2906	OPCW	Organisation for the Prohibition of Chemical Weapons
2907	OPEC	Organization of the Petroleum Exporting Countries
2908	OPFOR	Opposing force
2909	OPINTEL	Operational Intelligence
2910	OPLAN	Operation plan (also OpPlan)
2911	OPORD	Operation order
2912	OPSEC	Operations security,Open Platform for Security
2913	OPSI	Overwhelming post splenectomy infection,UK Office of Public Sector Information
2914	OPTAR	Operational target
2915	OPV	Offshore Patrol Vessel
2916	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)
2917	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
2918	ORAU	Oak Ridge Associated Universities
2919	ORB	Object Request Broker
2920	ORBAT	Order of Battle
2921	ORD	Office of Research and Development,Operational Requirements Document
2922	ORF	Operational iness Float
2923	ORISE	Oak Ridge Institute for Science and Education
2924	ORNL	Oak Ridge National Laboratory
2925	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
2926	ORSA	Oxacillin-resistant Staphylococcus aureus,Operations Research Society of America
2927	OS	Operating System
2928	Os	Osmium
2929	OSA	Order of St. Augustine
2930	OSCE	Organisation for Security and Cooperation in Europe
2931	OSD	U.S. Office of the Secretary of Defense,On-screen Display
2932	OSDL	Open Source Development Labs
2933	OSE	Own Separate Entrance
2934	OSERS	U.S. Department of Education Office of Special Education and Rehabilitative Services
2935	OSETI	Optical SETI also Optical SETI
2936	OSHA	Occupational Safety and Health Administration
2937	OSI	Office of Strategic Influence,Ontario Swine Improvement,Open Source Initiative,Open Systems Interconnection
2938	OSIA	(U.S.) On-Site Inspection Agency
2939	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)
2940	OSL	Open Source License, Optically Stimulated Luminescence, Orbiting Solar Laboratory
2941	OSM	One Saturday Morning
2942	OSOTPBOIAS	One Sec,On The Phone,Be Off In A Sec
2943	OSPA	Operations Security Professional's Association site of OSPA
2944	OSPA	Oregon School Psychologists Association [3]
2945	OSRH	Oružane Snage Republike Hrvatske (en: Armed forces of the Republic of Croatia)
2946	OSS	Office of Strategic Services (1942-1945, forerunner of CIA)
2947	OSU	Ohio State University,Oklahoma State University
2948	OTA	Office of Technology Assessment, Orthodontic Technicians Association
2949	OTAC	Orthodontic Technicians Association Conference,Orthodontic Technicians Association Council
2950	OTC	Over-The-Counter (drugs)
2951	OTD	Off the derech (referring to an Orthodox Jew who has stopped practicing the tenets of his or her faith)
2952	OTEA	(U.S. Army) Operational Test Evaluation Agency
2953	OTI	Office of Transition Initiatives (United States Agency for International Development)
2954	OTOH	On The Other Hand
2955	OTS	Off the scale,sexually untouchable except for a lot of money
2956	OTSBH	Over The Shoulder Boulder Holder
2957	OTW	On The Way
2958	OTYBL	Over To You Blue Leader
2959	OTYRL	Over To You Red Leader
2960	OU	University of Oklahoma
2961	OW	Old Wykehamist
2962	OWN	Oprah Winfrey Network
2963	OX	IATA code for Orient Thai Airlines
2964	OXC	Optical cross-connect
2965	OXM	Official Xbox Magazine
2966	OXT	Oxytocin
2967	OZ	(?) Australia
2968	p	pico
2969	P2P	Peer-to-peer (networking)
2970	pA	picoampere
2971	PAA	Position Area for Artillery
2972	PABX	Private Automated Branch eXchange (company phone system)
2973	PACOM	(U.S.) Pacific Command
2974	PADI	Professional Association of Diving Instructors
2975	PAEK	PolyArylEtherKetone
2976	PAFC	Plymouth Argyle Football Club
2977	PAH	Polycyclic aromatic hydrocarbon
2978	PAHO	Pan American Health Organization
2979	PAK	Pakistan (ISO 3166 trigram)
2980	PAM	Precision Attack Missile
2981	PANS	Pretty Advanced/Awesome Network Services (cf. POTS)
2982	PARC	Palo Alto Research Center
2983	PAROS	Prevention of an Arms Race in Outer Space (treaty)
2984	PARP	(NATO Partnership for Peace) Planning And Review Process
2985	PARWIG	Power Augmented Ram Wing In Ground (aeroplane wing shape)
2986	PAS	See entry
2987	PASR	Personnel Accounting and Strength Reporting
2988	PATH	Port Authority Trans-Hudson
2989	PAYD	Pay As You Drive
2990	PAYE	Pay As You Earn
2991	Pb	Lead (Latin Plumbum)
2992	PB	PolyButylene
2993	PBB	PolyBrominated Biphenyl
2994	PBCK	Problem Between Chair and Keyboard (computer help desk in-joke)
2995	PBD	PolyButaDiene
2996	PBDE	PolyBrominated Diphenyl Ether
2997	PBI	PolyBenzImidazole
2998	PBN	PolyButylene Naphthalate
2999	PBOH	Please Become Old History
3000	PBT	PolyButylene Terephthalate
3001	PBX	Private Branch eXchange (company phone system)
3002	pC	picocoulomb
3003	PCAS	Planet-Crossing Asteroid Survey
3004	PCB	see entry
3005	PCCB	Porsche Ceramic Composite Brake
3006	PCCIP	President's Commission on Critical Infrastructure Protection
3007	PCE	PerChlorEthylene
3008	PCIe	Peripheral Component Interconnect Express (computer bus)
3009	PCL	Passive Coherent Location
3010	PCMCIA	Personal Computer Memory Card International Association (People Can't Memorise Computer-Industry Acronyms)
3011	PCN	Pitcairn Islands (ISO 3166 trigram)
3012	PCPI	Physician Consortium for Performance Improvement (AMA)
3013	PCR	Polymerase chain reaction
3014	PCSSD	Pulaski County Special School District
3015	PCZ	Panama Canal Zone (ISO 3166 trigram; obsolete 1980)
3016	Pd	Palladium
3017	PD	Product Director—Example: CERDEC Product Director C4ISR and Network Modernization
3018	PDL	Pure Dumb Luck (Texan punk band)
3019	PDN	Pull-Down Network
3020	PDRY	People's Democratic Republic of Yemen (obsolete since 1990)
3021	PDT	Pacific Daylight [Saving] Time (UTC-7 hours)
3022	PE	Professional Engineer
3023	PEBCAC	Problem Exists Between Chair and Computer (IT help desk in-joke)
3024	PEBKAC	Problem Exists Between Keyboard and Chair (ditto)
3025	PEEK	PolyEtherEtherKetone
3026	PEET	Partnerships for Enhancing Expertise in Taxonomy
3027	PEK	PolyEtherKetone
3028	PEPFAR	President's Emergency Plan For AIDS Relief
3029	PER	Peru (ISO 3166 trigram)
3030	perl	usually lower case Practical Extraction and Report Language
3031	PES	PolyEtherSulfone
3032	PEST	UK Public Engagement with Science and Technology
3033	PETE	PolyEthyleneTErephthalate
3034	PETP	PolyEthyleneTerePhthalate
3035	pF	picofarad
3036	PFD	Permanent Fund Dividend = personal flotation device
3037	PFE	Permanent Forest Estate
3038	PfP	Partnership for Peace
3039	Pg	petagram
3040	pg	picogram
3041	PGCE	Postgraduate Certificate in Education
3042	PGD	Pre-implantation Genetic Diagnosis
3043	PGENI	Pharmaco-Genetics for Every Nation Initiative
3044	PGH	Pre-implantation Genetic Haplotyping
3045	PGM	Precision-Guided Munition
3046	PGP	Pretty Good Privacy
3047	PHL	Philippines (ISO 3166 trigram)
3048	PHQ	Patient Health Questionnaire
3049	Pi	Pebi
3050	PIB	PolyIsoButylene
3051	PIC	Person In Charge
3052	PICNIC	Problem In Chair Not In Computer
3053	PICS	Private Investment Capital Subscription
3054	PIF	Partners in Flight
3055	PIG	Pipeline Inspection Gauge
3056	PIN	Personal Identification Number
3057	PINF	People In Need Foundation (Czech charitable organisation)
3058	PIPA	Program on International Policy Attitudes
3059	PIR	Priority Intelligence Requirement
3060	PIRA	Provisional Irish Republican Army
3061	PIREPS	Pilot Reports
3062	PITA	Pain In The Ass
3063	PJ	petajoule
3064	pJ	picojoule
3065	PJHQ	Permanent Joint Headquarters
3066	PKE	Partnership of Kindermusik Educators [1] &[2] & [2]
3067	PKI	Public Key Infrastructure (cryptography)
3068	PKU	Phenylketonuria
3069	pL	picolitre
3070	PLAID	Precision Location and Identification
3071	PLB	Personal Locator Beacon
3072	PLC	Public Limited Company (British)
3073	PLCC	Plastic Leaded Chip Carrier (electronics)
3074	PLD	Probable Line of Deployment
3075	PLEBS	People Lacking Everyday Basic Skills
3076	PLF	Parachute Landing Fall
3077	PLIF	Planar Laser-Induced Fluorescence
3078	PLL	Phase-Locked Loop (electronics)
3079	PLM	Polarized Light Microscope/Microscopy
3080	PLMBA	Phospholipid Bilayer Microarray
3081	Pln	Platoon
3082	PLO	Palestine Liberation Organization
3083	PLOKTA	Press Lots Of Keys To Abort
3084	PLP	Platonic Life Partner
3085	PLUTO	Pipe Line Under The Ocean
3086	PLW	Palau (ISO 3166 trigram)
3087	pm	picometre
3088	PMC	Primary Motor Cortex
3089	PMI	Positive Material Identification
3090	PMID	PubMed Identifier
3091	PMMA	PolyMethylMethAcrylate
3092	PMS	Premenstrual Syndrome
3093	PMSL	Piss Myself Laughing (Internet shorthand)
3094	PMT	Premenstrual Tension (UK) (see Premenstrual Syndrome)
3095	pN	piconewton
3096	PNAC	Project for the New American Century
3097	PNVS	Pilot Night Vision Sensor
3098	Po	Polonium
3099	PO	Post Office
3100	PO	Purchase Order
3101	POCD	Post-Operative Cognitive Dysfunction
3102	pod	Plain Old Documentation
3103	POFF	Plain Old Flat File
3104	POGO	Project On Government Oversight
3105	POI	Program Of Instruction
3106	POK	Plane Of Knowledge
3107	POLAD	Political Advice
3108	POMDP	Partially observable Markov decision process
3109	PooS	Poo Sniffer (Internet shorthand)
3110	POS- Point Of Sale terminal (retail industry transaction computers)	Piece Of S**t
3111	POSH	Port Outbound Starboard Home (alleged)
3112	POSSLQ	Person of the Opposite Sex Sharing Living Quarters
3113	POT	Plane Of Tranquility
3114	POTS	Plain Old Telephone Service (cf. PANS),Postural Orthostatic Tachycardia Syndrome
3115	POTUS	President of the United States
3116	POV	Point of view
3117	POW	Prisoner of war
3118	PPASC	(U.S.) Plans and Program Analysis Support Center
3119	PPCLI	Princess Patricia's Canadian Light Infantry (regiment)
3120	PPLI	Precise Participant Location & Identification
3121	PPM	Project Planning and Management
3122	PPO	PolyPhenylene Oxide
3123	PPQN	Pulses Per Quarter Note (ditto)
3124	PPQT	Pre-Production Qualification Test
3125	PPV	Pay-per-view
3126	Pr	Pastor, Priest
3127	PR	Public Relations
3128	Prb	Presbyter
3129	PRBO	Point Reyes Bird Observatory
3130	PRC	People's Republic of China
3131	PRD	CERDEC Product Realization Directorate
3132	PRFG	Partial Fog (METAR Code)
3133	PRI	Puerto Rico (ISO 3166 trigram)
3134	PRK	Democratic People's Republic of Korea (ISO 3166 trigram)
3135	PRM	Personnel iness Management
3136	PRY	Paraguay (ISO 3166 trigram)
3137	Ps	petasecond
3138	pS	picosiemens
3139	PSG	Pacific Seabird Group
3140	PSI	Portable Source Initiative
3141	PSI	Pounds per square inch
3142	PSS	Personnel System Support
3143	PST	Pacific Standard Time (UTC-8 hours)
3144	PSU	Pennsylvania State University
3145	PsyOp	Psychological Operations
3146	pT	picotesla
3147	Pt	Platinum
3148	PTA	Parent-Teacher Association
3149	PTAL	Public Transport Accessibility Level
3150	PTES	People's Trust for Endangered Species
3151	PTFE	PolyTetraFluoroEthylene
3152	PTI	Pardon the Interruption
3153	PTSD	Post-Traumatic Stress Disorder
3154	Pu	Plutonium
3155	Pub	Publication
3156	PUG	PET Users Group
3157	PUN	Pull-Up Network
3158	PUP	Pull-Up Point
3159	PUS	United States Miscellaneous Pacific Islands (ISO 3166 trigram; obsolete 1986)
3160	PV	petavolt
3161	pV	picovolt
3162	PvE	Player versus Environment
3163	PvP	Player versus Player
3164	PVR	Personal Video Recorder
3165	PvZ	Plants vs. Zombies
3166	PW	Palau (postal symbol; ISO 3166 digram)
3167	pW	picowatt
3168	PWA	Pirates With Attitude
3169	PWBA	Pension and Welfare Benefits Administration
3170	PWC	PieceWise Constant (describing a mathematical function)
3171	PwC	PricewaterhouseCoopers (international accounting firm)
3172	PWL	PieceWise Linear (describing a mathematical function)
3173	PWLC	PieceWise Linear and Concave/Convex (describing a mathematical function)
3174	PWR	Pressurized Water Reactor
3175	PX	Post eXchange
3176	PYF	French Polynesia (ISO 3166 trigram)
3177	PYMWYMI	Put Your Money Where Your Mouth Is
3178	Q1	First quarter of the year
3179	Q2	Second quarter of the year
3180	Q3	Third quarter of the year
3181	Q4	Fourth quarter of the year
3182	QA	Qatar (ISO 3166 digram)
3183	Qantas	Queensland And Northern Territory Aerial Services
3184	QAT	Qatar (ISO 3166 trigram)
3185	QB	Quarterback (football)
3186	QCD	Quantum ChromoDynamics
3187	QD	quaque die (Latin for 'daily')
3188	QDR	Quadrennial Defense Review
3189	QEH	Queen Elizabeth's Hospital
3190	QK	Air Canada Jazz (IATA airline designator)
3191	QNH	Regional mean sea level atmospheric pressure (aeronautical Q code)
3192	QPS	Quark Publishing System
3193	QS	quantum sufficit (Latin, 'as much as suffices')
3194	QSCAT	Quick Scatterometer satellite
3195	QSL	Québec Sign Language
3196	QSO	Quasi-Stellar Object
3197	Quango	(British Commonwealth) QUasi Autonomous Non-Governmental Organisation
3198	Quasar	Quasi-stellar radio source
3199	QUB	Queen's University Belfast
3200	QUIET	Q and U Imaging ExperimenT (Q and U are the Stokes parameters of the CMBR polarization)
3201	qv	quod vide (Latin, 'which see')
3202	QZ	Awair (IATA airline designator)
3203	R2I	Resistance to Interrogation
3204	RA	Radio Australia
3205	Ra	Radium
3206	RAAF	Royal Australian Air Force
3207	Rabobank	Raiffeisen-Boerenleenbank (from the two banks that merged to form the modern company)
3208	RACK	Risk Aware Consensual Kink (SM phrase)
3209	Racon	RAdar beaCON
3210	RADA	Royal Academy of Dramatic Art
3211	Radar	Radio Detection And Ranging
3212	RadB	Rad51/Dmc1 homologous protein
3213	RADb	Routing Assets Data Base
3214	RADC	Region Air Defence Commander
3215	RAE	UK Royal Aircraft Establishment (-1991)
3216	RAGBRAI	Register's Annual Great Bicycle Ride Across Iowa
3217	Ramark	RAdar MARKer
3218	RAOC	Rear Area Operation Centre
3219	RARDE	UK Royal Armament Research and Development Establishment (1962-1991)
3220	RARE	Rapid Acquisition with Relaxation Enhancement (MRI technique)
3221	RATELO	Radiotelephone Operator
3222	Rb	Rubidium
3223	RB	Running Back (football)
3224	RBI	Runs Batted In
3225	RC	see entry
3226	RCAF	Royal Canadian Air Force
3227	RCC	Rescue Co-ordination Centre
3228	RCCO	Royal Canadian College of Organists
3229	RCHA	Royal Canadian Horse Artillery (regiment)
3230	RCMP	Royal Canadian Mounted Police
3231	RD	Radio Disney
3232	RDD	Radiological Dispersion Device
3233	RDM	Remotely Delivered/Deliverable Mine
3234	RDT	Remote Digital Terminal
3235	RDV	Remote Detection Vehicle
3236	Re	Rhenium
3237	RE	Royal Engineers
3238	REACT	Remote Electronically Activated Control Technology
3239	REAM	Retired Educators Association of Minnesota
3240	RECCE	Reconnaissance
3241	REEF	Reef Environmental Education Foundation
3242	REM	Rapid Eye Movement (sleep phase),Rosicrucian Egyptian Museum
3243	REME	Royal Electrical and Mechanical Engineers
3244	RERC	Rehabilitation Engineering Research Center
3245	RESNA	Rehabilitation Engineering and Assistive Technology Society of North America
3246	REU	Réunion (ISO 3166 trigram)
3247	Rf	Rutherfordium
3248	RFD	Request for Documentation
3249	RFE	Request for Evaluation
3250	RFEF	Real Federación Española de Fútbol (Spanish for Royal Spanish Football Federation)
3251	RFF	Right of First Refusal (legal term)
3252	RFID	Radio Frequency IDentification
3253	RFL	Rugby Football League
3254	RFP	Request for Proposal
3255	RFQ	Request for Quotation
3256	RFT	Request for Tender
3257	RFU	Rugby Football Union
3258	RG	Republican Guard
3259	Rg	Roentgenium
3260	RGB	Red Green Blue (colour model)
3261	RGBI	Red Green Blue Intensity (ditto)
3262	Rh	Rhodium
3263	RH	Southern Rhodesia (ISO 3166 digram; obsolete 1980)
3264	RHIC	Relativistic Heavy Ion Collider
3265	RHLI	Royal Hamilton Light Infantry (Canadian militia regiment)
3266	RHO	Southern Rhodesia (ISO 3166 trigram; obsolete 1980)
3267	RHU	Replacement Holding Unit
3268	RI	Rhode Island (postal symbol)
3269	RIAA	Recording Industry Association of America
3270	RIBA	Royal Institute of British Architects
3271	RIFA	Red imported fire ant
3272	RILA	Retail Industry Leaders Association
3273	RIMVS	Retinal Imaging Machine Vision System
3274	RINO	Republican In Name Only[1]
3275	RIP	Relief In Place,requiesca[n]t in pace (Latin for 'may he/she/they rest in peace')
3276	RISC	Reduced Instruction Set Computer
3277	RJD	Reduced Julian Day
3278	RKBA	Right to Keep and Bear Arms (Second Amendment to the United States Constitution)
3279	RKO	Radio-Keith-Orpheum Pictures
3280	RLP	Recognised [Operating/Operational] Land Picture
3281	RLS	Restless Leg Syndrome
3282	RLY	Rally Point
3283	RM	see separate disambiguation page
3284	RMC	Robert Menzies College
3285	RMDA	Records Management and Declassification Agency
3286	RMP	Recognised [Operating/Operational] Maritime Picture
3287	RN	Radio Netherlands
3288	Rn	Radon
3289	RNA	RiboNucleic Acid
3290	RNAD	Royal Naval Armaments Depot (UK)
3291	RNPS	Radio Network Planning System
3292	RNZ	Radio New Zealand
3293	RNZI	Radio New Zealand International
3294	ROA	Rate Of Ascent
3295	ROE	Rules Of Engagement
3296	ROFLOL	Rolling On the Floor Laughing Out Loud
3297	ROH	Ring of Honor
3298	ROK	Republic of Korea
3299	ROP	Render Output Pipeline
3300	ROPE	Research Opportunity and Performance Evidence
3301	ROS	Reactive Oxygen Species
3302	ROU	Romania (ISO 3166 trigram)
3303	ROV	Remotely Operated Vehicle
3304	ROZ	Restricted Operations Zone
3305	RPA	Regional Plan Association
3306	RPD	Recognition-Primed Decision-making
3307	RPF	Rwandan Patriotic Front
3308	RPL	Reverse Polish Lisp
3309	RPM	Revolutions Per Minute
3310	RPN	reverse Polish notation
3311	rps	revolutions per second
3312	RPV	Remotely Piloted Vehicle
3313	RQ	Puerto Rico (FIPS 10-4 territory code)
3314	RRB	Railroad Retirement Board
3315	RRN	Recurrence Rate Number
3316	RRP	Recurrent Respiratory Papillomatosis
3317	RRS	Racing Rules of Sailing
3318	RRSP	Registered Retirement Savings Plan (Canada; roughly equivalent to the IRA in the U.S.)
3319	RS	Russia (FIPS 10-4 country code)
3320	RSI	Repetitive Strain Injury
3321	RSJ	Rolled Steel Joist (construction)
3322	RSN	Real Soon Now (coined by author Jerry Pournelle)
3323	RSPB	(UK) Royal Society for the Protection of Birds
3324	RSPCA	Royal Society for the Prevention of Cruelty to Animals
3325	RSR	Required Supply Rate
3326	RSRE	UK Royal Signals and Radar Establishment (1976-1991)
3327	RSRI	Red Sands Research Institute
3328	RTA	Road traffic accident (British)
3329	RTBF	Radio-Télévision belge de la Communauté française
3330	RTF	Rich Text Format
3331	RTFM	the Fucking/Fine Manual
3332	RTG	Radio-isotope Thermoelectric Generator also used for Rubber Tyred Gantry crane
3333	RTI	Run-Time Infrastructure (Simulation)
3334	RTL	see entry
3335	RTP	Real-time Transport Protocol
3336	RTS	see entry
3337	RTT	Round Trip Timing
3338	RU	Russia (ISO 3166 digram)
3339	Ru	Ruthenium
3340	RUC	Royal Ulster Constabulary
3341	RUS	Russia (ISO 3166 trigram)
3342	RUSI	Royal United Services Institute for Defence Studies
3343	RW	Rwanda (ISO 3166 and FIPS 10-4 country code digram)
3344	RWA	Rwanda (ISO 3166 trigram)
3345	RWH	Rain Water Harvesting
3346	RWR	Radar Warning Receiver
3347	RWS	Remote Weapon Station
3348	Rx	Medical prescription (possibly from Latin 'recipere','to take': see entry)
3349	RX	Receive
3350	SARS	Severe Acute Respiratory Syndrome
3351	SBNO	Standing but not operating (in reference to amusement parks)
3352	SCOTUS	Supreme Court of the United States
3353	SCROTUS	So-called Ruler of the United States
3354	SDHC	Secure Digital High Capacity
3355	SDXC	Secure Digital eXtended Capacity
3356	SG	Senegal (FIPS 10-4 country code), Singapore (ISO 3166 digram), Snow Grains (METAR Code), Study Group
3357	SGOTUS	Second Gentleman of the United States
3358	SHO	Showtime (see also sho.com)
3359	sic	sic erat scriptum (Latin for 'thus was it written')
3360	SIRI	Service Interface for Real Time Information
3361	Siri	Speech Interpretation and Recognition Interface (Apple iOS software)
3362	SLOTUS	Second Lady of the United States (the vice president's wife)
3363	SoCon	Southern Conference (U.S. college sports)
3364	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)
3365	SSD	South Sudan (ISO 3166 trigram)
3366	SSDC	U.S. Space and Strategic Defense Command
3367	STB	Surface Transportation Board[2]
3368	SWAC	Southwestern Athletic Conference
3369	SWAN	System for Wearable Audio Navigation
3370	SWAT	Special Weapons And Tactics
3371	SWF	Single White Female
3372	Ta	Tantalum
3373	TAACOM	U.S. Theater Army Area Command
3374	TAADCOORD	Theatre Army Air Defence Co-ordinator
3375	TAAR	Trace Amine-Associated Receptor
3376	TAC	U.S. Tactical Air Command (1946-1992)
3377	TACAN	Tactical Air Navigation
3378	TACCO	Tactical Coordinator
3379	TACCSF	U.S. Theater Aerospace Command & Control Simulation Facility
3380	TACDAR	Tactical Detection And Reporting
3381	TACSOP	Tactical SOP (Standing Operating Procedure)
3382	TADIL	Tactical Digital Information Link
3383	TAI	Target[ed] Area of Interest
3384	TAJ	Tom and Jerry
3385	TAJT	Tom and Jerry Tales
3386	TALES	Technical Advice and Lexicon for Enabling Simulation
3387	TANJ	There Ain't No Justice (used as expletive in the Ringworld novels)
3388	TANP	Terrain-Aware Network Planner
3389	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)
3390	TAPPS	Texas Association of Private and Parochial Schools
3391	TARDIS	Time And Relative Dimension In Space (from Doctor Who)
3392	TAS	Tasmania (postal symbol)
3393	TASER	Thomas A. Swift's Electric Rifle
3394	TASM	Tactical Air-to-Surface Missile
3395	TAT	Tourism Authority of Thailand
3396	TATP	TriAcetone TriPeroxide
3397	TATT	Tired All The Time (medical diagnosis in-joke)
3398	Tb	Terbium
3399	TB	Tuberculosis
3400	TBA	to be announced
3401	TBBPA	TetraBromoBisPhenol-A
3402	TBD	to be done, or: to be documented, or: to be determined, or: to be decided
3403	TBF	to be fair
3404	TBH	To Be Honest
3405	TBL	Turkish Basketball League
3406	TBS	Turner Broadcasting System
3407	TBT	Tributyltin
3408	Tc	Technetium
3409	TCAA	Top Counter-Assault Agents
3410	TCAS	Traffic Collision Avoidance System
3411	TCCCS	Tactical Command,Control and Communication System
3412	TCD	Chad (ISO 3166 trigram)
3413	TCHD	Truck Cargo Heavy Duty
3414	TCL	Tool Command Language
3415	TCM	Turner Classic Movies
3416	TCU	Texas Christian University
3417	TCW	Tasty Coma Wife
3418	TCWMS	Tele-Center Workforce Management System
3419	TDA	The Disney Afternoon
3420	TDL	Tactical Data Link
3421	TDM	Time-Division Multiplexing
3422	TDMA	Time Division Multiple Access
3423	TDP	Technology Demonstration Programme
3424	TDRS	Tracking Data and Relay Satellite
3425	Te	Tellurium
3426	TEAL	Tasman Empire Airways Limited
3427	Team	Together everyone achieves more
3428	TEAMS	The East African Marine System (fiber optic cable)
3429	TED	Technology Entertainment Design prize
3430	TENCAP	Tactical Exploitation of National Capabilities
3431	TERS	Tactical Event Reporting System
3432	TES	Tactical Event System
3433	TEST	Thesaurus of Engineering and Scientific Terms
3434	TEU	Twenty-foot equivalent unit (cargo capacity)
3435	TeVeS	Tensor Vector Scalar theory
3436	TFMPP	Trifluorophenylmethylpiperazine
3437	TFR	Total Fertility Rate
3438	TFT	Thin-Film Transistor
3439	Tg	Teragram
3440	TG	Togo (ISO 3166 digram)
3441	TGO	Togo (ISO 3166 trigram)
3442	Th	Thorium
3443	THA	Thailand (ISO 3166 trigram)
3444	THAAD	Terminal High Altitude Area Defence
3445	THEGENTRY	The High-End Group of Earth's New Technologies Research Yield
3446	THEL	Tactical High Energy Laser ACTD
3447	THG	Tetrahydrogestrinone
3448	TIA	Total Information Awareness initiative
3449	TIA	Transient Ischemic Attack
3450	TIALD	Thermal Imaging and Airborne Laser Designation
3451	TIBS	Tactical Information Broadcast System
3452	TIC	Troops In Contact
3453	TIGERS	Topologically Integrated Geographic Encoding and Referencing System
3454	TINC	There Is No Cabal
3455	TIP	Thermal Identification Panel
3456	tits	Toes in the Sand
3457	TJD	Truncated Julian Day
3458	TJK	Tajikistan (ISO 3166 trigram)
3459	TKL	Tokelau (ISO 3166 trigram)
3460	TKM	Turkmenistan (ISO 3166 trigram)
3461	Tl	Thallium
3462	TLA	Three-Letter Abbreviation/Acronym
3463	TLAM	Tomahawk Land Attack Missile
3464	TLATOJL	The Life and Times of Juniper Lee
3465	TLPM	T1 Line Performance Monitor
3466	Tm	Terametre
3467	TMAP	Texas Medication Algorithm Project
3468	TMC	The Movie Channel
3469	TMD	Theatre Missile Defence
3470	TMDK	The Mighty Don't Kneel (Australian professional wrestling stable also active in Japan)
3471	TMI	Too Much Information
3472	TMJ	TemporoMandibular Joint (syndrome)
3473	TMNT	Teenage Mutant Ninja Turtles
3474	TMPG	Transparent Multi-Platform Gateway
3475	TMR	Twin Main Rotors (helicopter type)
3476	TMS	Transcranial Magnetic Stimulation
3477	TMT	Thirty Meter Telescope
3478	TMTOWTDI	There's Than One Way To Do It (from Perl)
3479	TNA	Total Nonstop Action Wrestling
3480	TNO	Trans-Neptunian Object
3481	TOBS	Time of OBServation
3482	TOC	Table Of Contents, Tactical Operations Centre, Temporo-Occipital transition Cortex, Top of Concrete
3483	TOG	Togo (IOC and FIFA trigram,but not ISO 3166)
3484	TOGS	Thermal Observation Gunnery Sight
3485	TOMS	Total Ozone Mapping Spectrometer (satellite instrument)
3486	TON	Tonga (ISO 3166 trigram)
3487	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
3488	TOT	Time On Target
3489	TOW	Tube-launched,Optically tracked,Wire-guided (anti-tank missile)
3490	TP	East Timor (ISO 3166 digram; obsolete 2002),São Tomé and Príncipe (FIPS 10-4 country code),Training Practice,Trident Ploughshares
3491	TPE	Chinese Taipei (IOC and FIFA trigram for the country also known as Taiwan)
3492	TPI	The point is
3493	TPO	Thrombopoietin
3494	TPS	The Pennington School
3495	TPTB	The Powers That Be (often used to refer to the people responsible for the content of TV series or movies)
3496	TQ	Top Qualifier (similar to Pole Position in car racing)
3497	TRA	Technology iness Assessment
3498	TRAC	(U.S. Army) TRADOC Analysis Center
3499	TRACON	Terminal Radar Approach Control
3500	TRADOC	(U.S. Army) Training and Doctrine Command
3501	TRANSCOM	U.S. Transportation Command
3502	TRAP	Tactical Receive equipment and related Applications
3503	TRASANA	TRADOC Systems Analysis Agency
3504	TRD	Towed Radar Decoy
3505	TRIGAT	Third Generation Antitank (missile)
3506	TRL	Technology readiness level
3507	Trp	Troop
3508	TRU	Transuranic
3509	TRUEX	Training in Urban Environment Exercise
3510	TRW	Thompson Ramo Wooldridge Inc.
3511	Ts	Terasecond
3512	TS	Terasiemens,Thunderstorm (METAR code),Tunisia (FIPS 10-4 country code),TinySex,Transsexual, Tough Sh*t
3513	TSA	Theatre Storage Area,Time Slot Allocation,Transportation Security Administration,The Salvation Army
3514	TSEC	Transmission Security Encryption Code
3515	TSL	Transportation Security Laboratory
3516	TSN	The Sporting News (historic name of the periodical now known as Sporting News),The Sports Network
3517	TSO	The Stationery Office (was HMSO until 1996),(U.S.) TRICARE Support Office,Trans-Siberian Orchestra (band)
3518	TSOP	Tactical Standing Operation Procedure,The Sound of Philadelphia (classic 1970s R&B instrumental)
3519	TSR	Terminate and Stay Resident
3520	TSSIA	The Subject Says It All
3521	TT	Teratesla,Terrestrial Time,Tourist Trophy (Motorcycle sport),Trinidad and Tobago (ISO 3166 digram)
3522	TTCT	Torrance Tests of Creative Thinking
3523	TTFN	Ta Ta For Now
3524	TTL	Tax,Title,License,Through-the-lens (photography),Time 'till live,Time to live,Transistor-transistor logic
3525	TTO	Trinidad and Tobago (ISO 3166 trigram)
3526	TTP	Tactics,Techniques,and Procedures,Thrombotic thrombocytopenic purpura,Trailer Transfer Point
3527	TTTEAF	Thomas the Tank Engine and Friends
3528	TTY	TeleTYpewriter (Printer)
3529	TTYL	To You Later (Internet slang)
3530	TTZ	Tetrazolium
3531	TU	Technische Universität (German for 'Technical University'),Thammasat University (Thailand),Turkey (FIPS 10-4 country code)
3532	TUC	Trades Union Congress
3533	TUG	TeX Users Group
3534	TUI	Text-based user interface (cf. CLI),among other uses
3535	TUM	Technische Universität München (Germany)
3536	TUN	Tunisia (ISO 3166 trigram)
3537	TUNS	Technical University of Nova Scotia
3538	TUR	Turkey (ISO 3166 trigram)
3539	TUSK	Tank Urban Survival Kit
3540	TUV	Tuvalu (ISO 3166 trigram)
3541	TV	Television,Teravolt,Transvestite,Tuvalu (ISO 3166 and FIPS 10-4 country code digram)
3542	Tv	Time value,a designation seen on some camera dials for shutter priority mode
3543	TVA	Tennessee Valley Authority
3544	TVG	Television Games (Network),Tick,Very Good,Often used by School Teachers when marking homework etc. (Tick VG)[1][2]
3545	TVR	TreVor (Wilkinson) Racing
3546	TVS	Tornado vortex signature
3547	TW	Republic of China (Taiwan) (ISO 3166 and FIPS 10-4 country code digram),Terawatt
3548	TWAIN	Technology Without An Interesting Name
3549	TWE	Trans World Entertainment
3550	TWI	The Welding Institute
3551	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
3552	TWN	Republic of China (Taiwan) (ISO 3166 trigram)
3553	TWP	Technical Working Paper
3554	TWS	Thermal Weapon Sight,Track While Scan
3555	TX	Texas (postal symbol),Transmit,Turkmenistan (FIPS 10-4 country code)
3556	TXV	Thermostatic Expansion Valve
3557	TYT	Take Your Time,Internet chat abbreviation
3558	TZ	Tanzania (ISO 3166 and FIPS 10-4 country code digram)
3559	TZA	Tanzania (ISO 3166 trigram)
3560	TZC	Tetrazolium chloride
3561	U	Uranium
3562	UA	Unit of Action
3563	UAAP	University Athletic Association of the Philippines
3564	UAB	University of Alabama at Birmingham
3565	UAP	Unidentified Anomalous Phenomena
3566	UAV	Unmanned Aerial Vehicle,Unprotected Anal and Vaginal sex,UB[edit]
3567	UBC	United Baptist Church,University of British Columbia
3568	UBI	Universal Basic Income
3569	UBIGEO	Ubicación Geografica (Spanish for Geographical Location)
3570	UBS	Unbundled Bitstream Services,United Bank of Switzerland,United Banque Suisse
3571	UCBSA	United Cricket Board of South Africa
3572	UCF	University of Central Florida
3573	UCLA	University of California at Los Angeles
3574	UCLES	University of Cambridge Local Examinations Syndicate
3575	UCR	University of California at Riverside
3576	UCR	University of Costa Rica
3577	UCS	Union of Concerned Scientists
3578	UCSB	University of California at Santa Barbara
3579	UCSD	University of California at San Diego
3580	UDAS	Uppsala-DLR Asteroid Survey
3581	UDDI	Universal Description,Discovery and Integration
3582	UDTS	Uppsala-DLR Trojan Survey
3583	UE	Unit of Employment
3584	UEFA	Union of European Football Associations
3585	UESAC	Uppsala-ESO Survey of Asteroids and Comets
3586	UFC	Ultimate Fighting Championship
3587	UFO	Unidentified Flying Object, or: United Farmers of Ontario
3588	UGV	Unmanned Ground Vehicle
3589	UHF	Ultra High Frequency
3590	UHMW	Ultra-High Molecular Weight
3591	UHRB	Ultra-High Resolution Building (simulation)
3592	UIC	University of Illinois at Chicago
3593	UID	User ID
3594	UIUC	University of Illinois at Urbana-Champaign
3595	UJTL	Universal Joint Task List
3596	UKIP	United Kingdom Independence Party
3597	UKR	Ukraine (ISO 3166 trigram)
3598	UL	Underwriters Laboratories
3599	ULF	Ultra Low Frequency
3600	UM	U.S. Minor Outlying Islands (postal symbol; ISO 3166 digram)
3601	UMCP	Unit Maintenance Collection Point
3602	UMES	University of Maryland Eastern Shore
3603	UMI	U.S. Minor Outlying Islands (ISO 3166 trigram)
3604	UMIST	University of Manchester Institute of Science and Technology
3605	UMTS	Universal Mobile Telecommunications System
3606	UN	United Nations
3607	UNABOM	University and airline bomber (FBI case name)
3608	UNAIDS	Joint United Nations Programme on HIV/AIDS
3609	UNAMSIL	United Nations Mission in Sierra Leone
3610	UNCF	United Negro College Fund
3611	UNCLOS	United Nations Convention on the Law of the Sea
3612	UNCSGN	United Nations Conference on the Standardization of Geographical Names
3613	UNCTAD	United Nations Conference on Trade and Development
3614	UNDCP	United Nations Drug Control Programme
3615	UNDE	Union of National Defence Employees (Canada)
3616	UNDP	United Nations Development Programme
3617	UNEP	United Nations Environment Programme
3618	UNFCCC	United Nations Framework Convention on Climate Change
3619	UNFICYP	United Nations Peacekeeping Force in Cyprus
3620	UNGEGN	United Nations Group of Experts on Geographical Names
3621	UNHCR	United Nations High Commission (er) for Refugees
3622	UNICEF	United Nations Children's Fund (originally the United Nations International Children's Emergency Fund)
3623	UNICRI	United Nations Interregional Crime and Justice Research Institute
3624	UNIDO	United Nations Industrial Development Organization
3625	UNIFEM	United Nations Development Fund for Women (from the French Fonds de développement des Nations unies pour la femme)
3626	UNLV	University of Nevada,Las Vegas
3627	UNMIK	United Nations Interim Administration Mission in Kosovo
3628	UNOSOM	United Nations Operations in Somalia
3629	UNPROFOR	United Nations Protection Force (in former Yugoslavia)
3630	UNRISD	United Nations Research Institute for Social Development
3631	UNSM	Union of Nova Scotian Municipalities
3632	UNTAC	United Nations Transitional Authority in Cambodia
3633	UNTAET	United Nations Transitional Administration in East Timor
3634	UNU	United Nations University
3635	UPdM	Università Popolare della Multimedialità
3636	UPF	Universitat Pompeu Fabra (Catalan for: 'Pompeu Fabra University')
3637	UPI	United Press International
3638	UPN	United Paramount Network
3639	UPU	Universal Postal Union
3640	UR	Soviet Union (NATO country code,obsolete 1992)
3641	URBSFA	Union royale belge des sociétés de football association (French for Royal Belgian Football Association)
3642	URD	User Requirements Document
3643	URI	University of Rhode Island
3644	URU	Uruguay (IOC and FIFA trigram, but not ISO 3166)
3645	URY	Uruguay (ISO 3166 trigram)
3646	US	United States (also ISO 3166 and FIPS 10-4 country code digram)
3647	USA	United States of America (also ISO 3166 trigram), United States Army
3648	USAADAC	U.S. Army Air Defense Artillery Center,Fort Bliss,Texas
3649	USAARMC	U.S. Army ARMor Center,Fort Knox,Kentucky
3650	USAAVNC	U.S. Army AViatioN Center,Fort Rucker,Alabama
3651	USAFSPC	U.S. Air Force Space Command
3652	USAIC	U.S. Army Infantry Center,U.S. Army Intelligence Center
3653	USAID	United States Agency for International Development
3654	USAP	Union Sportive des Arlequins Perpignanais,United States Antarctic Program
3655	USAPATRIOT	Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism
3656	USAREUR	United States Army Europe
3657	USB	Universal Serial Bus
3658	USC	United States Code,University of South Carolina,University of Southern California
3659	USCG	United States Coast Guard
3660	USCINCSPACE	United States Commander in Chief,Space Command
3661	USDA	United States Department of Agriculture
3662	USDI	United States Department of the Interior
3663	USDOE	United States Department of Energy
3664	USDRE	(U.S.) Under-Secretary of Defense for Research and Engineering (1978-1986)
3665	USEC	United States Enrichment Corporation
3666	USFL	United States Football League
3667	USFWS	United States Fish and Wildlife Service
3668	USGS	United States Geological Survey
3669	USIA	United States Information Agency
3670	USJFCOM	United States Joint Forces Command
3671	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
3672	USMNT	United States men's national (soccer) team
3673	USNA	United States National Arboretum,United States Naval Academy
3674	USNB	United States Naval Base
3675	USNG	United States National Grid
3676	USNH	United States Naval Hospital
3677	USNI	United States Naval Institute
3678	USNO	U.S. Naval Observatory
3679	USNOFS	United States Naval Observatory Flagstaff Station
3680	USNP	United States Newspaper Program
3681	USNR	United States Navy Reserve
3682	USNS	United States Naval Ship
3683	USNY	University of the State of New York (usually pronounced 'use-knee')
3684	USNZ	University Sport New Zealand
3685	USPS	United States Postal Service
3686	USPTO	United States Patent and Trademark Office
3687	USR	User
3688	USS	United States ship (sometimes meaningless; see Star Trek)
3689	USSPACECOM	United States Space Command
3690	USSR	Union of Soviet Socialist Republics
3691	UST	Underground Storage Tank
3692	USTRANSCOM	United States Transportation Command
3693	USWNT	United States women's national (soccer) team
3694	UT	Universal Time
3695	UTC	Coordinated Universal Time
3696	UTEP	University of Texas at El Paso (pronounced you-tep)
3697	UTM	Universal Transverse Mercator (geographical co-ordinate system)
3698	UUA	Unitarian Universalist Association
3699	UUV	Unmanned Underwater Vehicle
3700	UW	University of Washington
3701	UWO	University of Western Ontario
3702	UWT	Under Water Telephone
3703	UWTG	Under Water Tug
3704	UWW	United World Wrestling
3705	UXO	Unexploded Ordnance
3706	UY	Uruguay (ISO 3166 and FIPS 10-4 country code digram)
3707	UZ	Uzbekistan (ISO 3166 and FIPS 10-4 country code digram)
3708	UZB	Uzbekistan (ISO 3166 trigram)
3709	VACIS	Vehicle And Container Inspection System
3710	VACIS	Victorian Ambulance Clinical Information System
3711	VANOS	Variable Nockenwelle System
3712	VAO	Vienna Art Orchestra
3713	VAT	Vatican City-State (ISO 3166 trigram)
3714	VBA	Visual Basic for Applications
3715	vCJD	Variant Creutzfeldt-Jakob Disease
3716	VCNO	(U.S.) Vice Chief of Naval Operations
3717	VCofS	Vice Chief of Staff
3718	VCR	Video cassette recorder
3719	VCT	Saint Vincent and the Grenadines (ISO 3166 trigram)
3720	VDFS	VisualSVN Distributed File System (VDFS)
3721	VE	Venezuela (ISO 3166 digram)
3722	VEEGA	Venus Earth Earth Gravity Assist manœuvre
3723	VEN	Venezuela (ISO 3166 trigram)
3724	VERITAS	Very Energetic Radiation Imaging Telescope Array System
3725	VfD	s for deletion (used in Wikipedia)
3726	VFM	Value For Money
3727	VFMO	Very Fast Moving Object (astronomy)
3728	VFT	Virtual Function Table
3729	VFW	Veterans of Foreign Wars
3730	VG	British Virgin Islands (ISO 3166 digram)
3731	VGB	British Virgin Islands (ISO 3166 trigram)
3732	VH1	Video Hits One
3733	VHF	Very High Frequency
3734	VIA	Versatile Interface Adapter
3735	VIDS	Visual Information Display System
3736	VII	7 (in Roman numerals)
3737	VIII	8 (in Roman numerals)
3738	VIN	Vehicle Identification Number (ISO 3779)
3739	VIP	Very Important Person
3740	VISCII	VIetnamese Standard Code for Information Interchange
3741	VIT	Vellore Institute of Technology
3742	VIVO	Video In Video Out
3743	VJ	Video Jockey
3744	VLAD	Vertical Line Array DIFAR
3745	VLBA	Very Long Baseline Array
3746	VLF	Very Low Frequency
3747	VLIW	Very Long Instruction Word
3748	VLPFC	VentroLateral PreFrontal Cortex
3749	VLPMC	VentroLateral PreMotor Cortex
3750	VLSI	Very-large-scale integration
3751	VM	Vietnam (FIPS 10-4 country code)
3752	VMF	Marine Fighting Squadron of the United States Marine Corps
3753	VMF	Variable Message Format
3754	VMN	VentroMedial Nucleus (neurophysiology)
3755	VN	Vietnam (ISO 3166 digram)
3756	VNIR	Visible and Near InfraRed
3757	VNM	Vietnam (ISO 3166 trigram)
3758	VNS	see entry
3759	VOA	Voice of America
3760	VOIP	Voice Over Internet Protocol
3761	VOLT	Visual OpenType Layout Tool
3762	VON	Victorian Order of Nurses
3763	VOR	Voice of Russia
3764	VOX	Voice Operated oscillator
3765	VPOTUS	Vice President of the United States
3766	VR	Virtual Reality
3767	VRSG	Virtual Reality Scene Generator
3768	VSAT	Very Small Aperture Terminal ('vee-satt')
3769	VSHORAD	Very Short Range Air Defence
3770	VSO	Voluntary Services Overseas
3771	VSR	Very Special Relativity
3772	VTC	Video Tele-Conference
3773	VTEC	Variable valve Timing and Electronic lift Control
3774	VU	Vanuatu (ISO 3166 digram), Vedanta University
3775	VUB	Vrije Universiteit Brussel (Belgian university)
3776	VUT	Vanuatu (ISO 3166 trigram)
3777	VV	Via Voice,Village Voice
3778	VVAF	Vietnam Veterans of America Foundation
3779	VW	Volkswagen
3780	VZ	Verizon Communications (NYSE code)
3781	W	Tungsten (from German Wolfram),Watt,West
3782	W3C	World Wide Web Consortium
3783	WA	Namibia (from West Africa),Washington state (postal symbol),Western Australia (postal symbol),World Archery (Federation)
3784	WAAC	Women's Army Auxiliary Corps (Britain) (World War I UK)
3785	WAAF	Women's Auxiliary Air Force (World War II UK)
3786	WAC	Western Athletic Conference,Women's Auxiliary Corps (World War II Canada),Women's Army Corps (World War II U.S.)
3787	WACC	Weighted Average Cost of Capital (accounting)
3788	WACS	What-A-Cartoon! Show
3789	WAD	Weapons Alert Designator
3790	WAGGGS	World Association of Girl Guides and Girl Scouts
3791	WAGs	Wives And Girlfriends (most notably of England national football team players at the 2006 FIFA World Cup,although the term existed earlier)
3792	WAL	see entry
3793	WAPIMA	What a pain in my ass
3794	WAR	With All Respect
3795	WAsP	Short form of WAAAAP (Wind Atlas Analysis and Application Program)
3796	WAYP	White And Yellow Pages
3797	WB	Warner Bros.,Welcome Back (Internet shorthand)
3798	Wb	Weber
3799	WBA	Warner Bros. Animation,West Bromwich Albion (F.C.),World Boxing Association
3800	WBC	World Boxing Council
3801	WBE	Work Breakdown Element
3802	WBO	World Boxing Organization
3803	WC	Water Closet,Winston Churchill,World Cup (sports)
3804	WCBO	World Chess Boxing Organisation
3805	WCBP	World Center for Birds of Prey
3806	WCL	World Confederation of Labour
3807	WCS	Weapon Control Status,Wildlife Conservation Society
3808	WCW	World Championship Wrestling
3809	WDC	Western Design Center,World Data Center
3810	WDIN	Wildlife Disease Information Node
3811	WDWR	Walt Disney World Resort
3812	WEBS	Weapon Effectiveness Battle Simulation
3813	WEC	World Extreme Cagefighting
3814	WEEE	Waste Electrical and Electronic Equipment
3815	WEF	World Economic Forum
3816	WEM	West Edmonton Mall
3817	WEU	Western European Union
3818	WEZ	Weapon Engagement Zone
3819	WF	Wallis and Futuna Islands (ISO 3166 digram)
3820	WFC	Women's Forage Corps (World War II UK)
3821	WFD	Weapon of Focused Destruction
3822	WFF	Wallops Flight Facility
3823	WFI	Water for Injection
3824	WFH	Working from home
3825	WFP	World Food Program
3826	WFZ	Weapons Free Zone
3827	WH	Wehrmacht Heer (German World War II army vehicle licence plate code)
3828	WHAM	Wisconsin Hydrogen-Alpha Mapping (telescope)
3829	WHI	Women's Health Initiative
3830	WHIP	Walks plus hits per inning pitched
3831	WHO	World Health Organisation
3832	WHS	(U.S.) Washington Headquarters Services
3833	WI	Western Sahara (FIPS 10-4 country code),Wisconsin (postal symbol),Women's Institute
3834	WIA	Wounded In Action,Wireless Institute of Australia (Amateur Radio)
3835	WIIFM	What's in it for me?
3836	WIMP	Weakly Interacting Massive Particle, Windows,Icons,Menus,Pointers
3837	WIP	Work In Progress
3838	WIPO	World Intellectual Property Organization
3839	WIPP	[Nuclear] Waste Isolation Pilot Plant
3840	WIYN	Wisconsin Indiana Yale NOAO telescope consortium
3841	WK	Wake Island (ISO 3166 digram,obsolete 1986)
3842	WKYP	Will Keep You Posted
3843	WL	Wehrmacht Luftwaffe (German World War II air force vehicle licence plate code)
3844	WLB	Women's Land Brigade (World War II Canada)
3845	WLF	Wallis and Futuna Islands (ISO 3166 trigram)
3846	WLOG	Without Loss Of Generality (see WOLOG)
3847	WLTP	Worldwide harmonized Light vehicles Test Procedure
3848	WM	Wehrmacht Marine (German World War II navy vehicle licence plate code)
3849	WMANUS	West Midlands Area National Union of Students
3850	WMD	World Movement for Democracy
3851	WMI	Wildlife Management Institute
3852	WMO	World Meteorological Organization
3853	WNA	World Nuclear Association
3854	WNF	Will Not Fix
3855	WNIT	Women's National Invitation Tournament
3856	WNSD	What's New,Scooby-Doo?
3857	WNW	West North-West
3858	WO	Warrant Officer
3859	WOF	Width of Fabric
3860	WOFT	Waste Of Fucking Time
3861	WOFTAM	Waste Of Fucking Time And Money
3862	WOI	Wheels Of Italy
3863	WOM	Write Only Memory
3864	WOS	Wilson Ornithological Society
3865	WOSM	World Organization of the Scout Movement, Worldwide Oil Spill Model
3866	WOT	Waste Of Time
3867	WP	White Phosphorus (ammunition)
3868	WPB	War Production Board during World War II
3869	WPE	World Pork Expo
3870	WPK	Wider Peacekeeping
3871	WPT	World Poker Tour,World Premiere Toons
3872	WR	Wide Receiver (football)
3873	WRAC	Women's Royal Army Corps (World War II UK)
3874	WRAIR	Walter Reed Army Institute of Research
3875	WRBWWRM	We Best What We Most
3876	WRC	World Rally Championship
3877	WRC	World Religions Conference
3878	WRNG	Warning
3879	WRS	Worldwide Reference System
3880	WRT	With respect to (especially in fields such as Mathematics)
3881	WRT	NHS Workforce Review Team
3882	WRT	The Linksys routers whose model name start with 'WRT'
3883	WRT	Third party firmware for the Linksys WRT routers and compatible models from other vendors.
3884	WRT	Wallace Roberts & Todd,LLC (Urban Planning and Design)
3885	WRT	Web Runtime (WRT) is a portable application framework developed by Nokia that allows the creation of widgets on the S60 Platform.
3886	WRT	Wholesale,Trade,Retail sector,category in employment and economics statistics
3887	WRT	Wireless Receiver/Transmitter (computer networks/IT)
3888	WRT	Wireless Ronin Technologies (digital signage)
3889	WRT	World Rally Team
3890	WRT	Writer Response Theory
3891	WRVS	Women's Royal Voluntary Service,now only known by the acronym (UK)
3892	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)
3893	WSC	Weapon System Catalogue
3894	WSDL	Web Services Description Language
3895	WSJ	(The) Wall Street Journal
3896	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)
3897	WSROC	Western Sydney Regional Organisation of Councils
3898	WSSM	Winchester Super Short Magnum (family of rifle cartridges)
3899	WSTC	Women Signallers Territorial Corps (World War II UK)
3900	WSW	West South-West
3901	WTB	Wales Tourism Board,Warenterminbörse Hannover
3902	WTC	World Trade Center
3903	WTF	What the fuck?; also What a Terrible Failure (android)
3904	WTFH	What The Fucking Hell
3905	WTH	What the Hell
3906	WTO	World Trade Organization
3907	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)
3908	WUBU2	What you been up to
3909	WUU2	What you up to (Internet slang popular with teenagers)
3910	WV	West Virginia (postal symbol)
3911	WVA	World Veterinary Association
3912	WVIAC	West Virginia Intercollegiate Athletic Conference
3913	WVR	Women's Volunteer Reserve (World War II UK)
3914	WVSC	Women's Volunteer Service Corps (World War II Canada)
3915	WVU	West Virginia University
3916	WW	see entry
3917	WWE	World Wrestling Entertainment
3918	WWI	World War I
3919	WWII	World War II
3920	WWIII	World War III
3921	WWJD	What would Jesus do?
3922	WWS	Wheaton Warrenville South High School
3923	WWWF	World Wide Wrestling Federation
3924	WXO	Weather [Executive] Officer
3925	WY	Wyoming (postal symbol)
3926	WZ	Swaziland (FIPS 10-4 country code)
3927	XBML	eXtended Business Modelling Language
3928	XC	Ninety (in Roman numerals)
3929	XCBL	XML Common Business Library
3930	XD	Used in chatrooms or email for smiley face. X is the eyes; squinted D is the mouth; XD.
3931	Xe	Xenon
3932	XFA	XML Forms Architecture
3933	XFC	Xtreme Fighting Championships
3934	XFD	Fighter aircraft made by Douglas
3935	Xfe	X File Explorer
3936	XFF	X-Forwarded-For
3937	XFG	Exfoliation glaucoma
3938	XFR	Automobile made by Jaguar
3939	XFT	X FreeType interface library
3940	XG	Automobile made by Hyundai
3941	XGA	Extended Graphics Array
3942	XGP	Extreme Game Player
3943	XHTML	eXtensible Hypertext Markup Language
3944	XI	Eleven (in Roman numerals)
3945	XII	Twelve (in Roman numerals)
3946	XIII	Thirteen (in Roman numerals)
3947	XIV	Fourteen (in Roman numerals)
3948	XIX	Nineteen (in Roman numerals)
3949	XJS	Automobile made by Jaguar
3950	XKB	X keyboard extension
3951	XKE	Automobile made by Jaguar
3952	XKR	Automobile made by Jaguar
3953	XML	eXtensible Markup Language
3954	XMSF	eXtensible Modelling and Simulation Framework
3955	XNA	X-No-Archive,Xeno Nucleic Acid
3956	XNC	X Northern Captain
3957	XNU	X is Not Unix
3958	XP	eXperience Point (role-playing games)
3959	XQJ	XQuery API for Java™
3960	XRAY	X-Ray
3961	XRML	eXtensible Rights Markup Language
3962	XS	Xiaolin Showdown
3963	XSL	eXtensible Style Language
3964	XTMH	eXtreme Technology Multiprocessor Hyperlanguage
3965	XUL	XML User Interface Language
3966	XV	Fifteen (in Roman numerals)
3967	XVI	Sixteen (in Roman numerals)
3968	XVII	Seventeen (in Roman numerals)
3969	XVIII	Eighteen (in Roman numerals)
3970	XWF	Xcitement Wrestling Federation
3971	XX	Twenty (in Roman numerals)
3972	Xyl	Xylobium
3973	XZN	Triple square screw driver
3974	y	Yocto-
3975	Y2K	Year Two Thousand
3976	yA	Yoctoampere
3977	Ya	Yottayear
3978	YaBPr	Yet another Brother Pat rant
3979	YABSLAG	Yet another boy singing like a girl
3980	YAC	Youth-Adult Committee
3981	YAFLA	Yet Another Five Letter Abbreviation
3982	YAP	Young Aspiring Professional
3983	YB	Youcef Benzouada (Southern Algerian name)
3984	Yb	Ytterbium
3985	yC	Yoctocoulomb
3986	YC	Yottacoulomb
3987	YDS	Yosemite Decimal System (climbing)
3988	YE	Yemen (ISO 3166 digram)
3989	YEM	Yemen (ISO 3166 trigram)
3990	yF	Yoctofarad
3991	YF	Yottafarad
3992	yg	Yoctogram
3993	Yg	Yottagram
3994	YGCO	Yamaneko Group of Comet Observers
3995	Ygo	Yu-Gi-Oh!
3996	yH	Yoctohenry
3997	YH	Yottahenry
3998	YHBT	You Have Been Trolled
3999	YHII	You Have It Inside
4000	YHS	Ya Hoor sur!
4001	Yi	Yobi
4002	Yippie	Youth International Party + suffix
4003	yJ	Yoctojoule
4004	YJ	Yottajoule
4005	yK	Yoctokelvin
4006	YK	Yottakelvin
4007	YKYFCW	You know you're from Christchurch when (post-earthquake joke)
4008	yL	Yoctolitre
4009	YL	Yottalitre
4010	ym	Yoctometre
4011	Ym	Yottametre
4012	YMMD	You Make My Day
4013	yN	Yoctonewton
4014	YN	Yottanewton
4015	YOLO	You Only Live Once
4016	YPA	Yards per Pass Attempt (football statistic)
4017	YPIO	Your Problem Is Obvious
4018	YPO	Young Presidents' Organization
4019	ys	Yoctosecond
4020	yS	Yoctosiemens
4021	Ys	Yottasecond
4022	YS	Yottasiemens
4023	YSI	Young Scots for Independence
4024	yT	Yoctotesla
4025	YTD	Year-To-Date
4026	YTM	Yield to Maturity
4027	YTS	Youth Training Scheme
4028	YTT	Yoshi Topsy-Turvy
4029	Yuppie	Young Urban Professional + suffix
4030	yV	Yoctovolt
4031	YV	Yottavolt
4032	yW	Yoctowatt
4033	YW	Yottawatt
4034	YYH	YuYu Hakusho
4035	z	Zepto
4036	Z	Zetta
4037	zA	Zeptoampere
4038	ZAF	South Africa (ISO 3166 trigram)
4039	ZAMS	Zero age main sequence
4040	ZAS	Zylinder Abschaltung System
4041	ZBT	Zero-Balance Transfer (accounting)
4042	zC	Zeptocoulomb
4043	ZC	Zettacoulomb
4044	ZCM	(n) ZENworks Configuration Management
4045	ZCMK	Zone Control Master Key
4046	ZCU	Zimbabwe Cricket Union