PowerShell/Data/Abbr/general.csv

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