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