List of acronyms: B

This list contains acronyms, initialisms, and pseudo-blends  that begin with the letter B.

For the purposes of this list:

• acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
• initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
• pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).

(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome

(i) = initialism, e.g.: CD – (i) compact disc

(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women

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

Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P. (Main list of acronyms)

• B – (s) Bel – Boron

• B10 – (i) Ben 10
• B10: AF – (i) Ben 10: Alien Force
• B10: UA – (i) Ben 10: Ultimate Alien
• B2B – (i) Business-to-business electronic commerce
• B2C – (i) Business-to-consumer electronic commerce
• B2E – (i) Business-to-employee electronic commerce
• B2M – Business to many

• ba – (s) Bashkir language (ISO 639-1 code)
• Ba – (s) Barium
• BA –
  • (i) Bachelor of Arts
  • (s) Bahrain (FIPS 10-4 country code)
  • Bosnia and Herzegovina (ISO 3166 diagram)
  • (i) British Airways
  • British Army
  • Bank of America
• BAA – (i) British Airport Authority
• BAC – (a) Blood alcohol content
  • British Aircraft Corporation
• BAD – (HBO) Boxing After Dark
• BADD – (a) Battlefield Awareness and Data Dissemination
• BAE – (p) BAE Systems (formerly British Aerospace, BAe)
• BAFTA – (a) British Academy of Film and Television Arts
• BAI – (i) Battlefield Air Interdiction
• bak – (s) Bashkir language (ISO 639-2 code)
• BALCO – (p) Bay Area Laboratory Co-operative
• bam – (s) Bambara language (ISO 639-2 code)
• BAM –
  • (i) Business Activity Monitoring
  • (s) Bosnia and Herzegovina convertible mark (ISO 4217 currency code)
• BAMC – (i) Brooke Army Medical Center
• Banesto – (p) Banco Español de Crédito (Spanish, "Spanish Credit Bank")
• BANG – (a) Bits, Atoms, Neurons, Genes
• BAO – (i) Battlefield Air Operations
• BAOR – (i) British Army Of the Rhine
• B[a]P – (p) Benzo[a]pyrene
• BAR
  • (s) Barbados (IOC trigram, but not FIFA or ISO 3166)
  • (a) British American Racing
  • Browning Automatic Rifle
  • Buy-American Restrictions
• BARD – (a) Binational Agricultural Research and Development fund (between the US and Israel)
• BARDA – (a) Biomedical Advanced Research and Development Authority
• BART – (a) Bay Area Rapid Transit
• BAS – (i) Battalion Aid Station
• BASE – (a) Building, Antenna, Span, Earth (parachute from)
• BASF – (i) Badische Anilin und Soda Fabrik (Baden Aniline and Soda Factory, a German chemicals company)
• BASIC – (a) Beginner's All-purpose Symbolic Instruction Code (acronym was added later, originally it was simply Basic)
• BAT – (a/i) Basic Aid Training
  • (a) British American Tobacco, London, England
  • (a) British Antarctic Territory (overseas territory)
• BATF – (i) U.S. Bureau of Alcohol, Tobacco, and Firearms
• BATS –
  • (a) Behavior Analysis Training System
  • Bradley Advanced Training System
• BATTeRS – (a) Bisei Asteroid Tracking Telescope for Rapid Survey

• BB
  • (s) Barbados (ISO 3166 digram; FIPS 10-4 country code)
  • (i) Boys' Brigade (Christian youth organization)
  • Brigitte Bardot (actress)
  • Bumblebee
• BBB
  • (i) Better Business Bureau
  • Blood–brain barrier
  • (p/i) BoerBurgerBeweging (Dutch, "Farmer–Citizen Movement"; Dutch political party)
• BBC
  • (i) Breeding Bird Census
  • British Broadcasting Corporation
  • (i) Bumper to Back of Cab (trucking measurement)
• BBCOR – (i) Bat-ball coefficient of restitution (standard used for non-wood bats used in US college baseball)
• BBD
  • (s) Barbadian dollar (ISO 4217 currency code)
  • (a) Bowel Bladder Dysfunction
• BBL
  • (i) Be Back Later
  • (i) Brazilian Butt Lift
  • Bird Banding Laboratory
  • British Basketball League
• BBN – (i) Bolt, Beranek and Newman
• BBOL – Blessing Ball of Light
• BBQ – (s) Barbecue^[1]
• BBS
  • (i) Breeding Bird Survey (North America)
  • Brigade/Battalion Battle Simulation
  • Bulletin Board System
• BBSRC – (i) U.K. Biotechnology and Biological Sciences Research Council
• BBVA – (i) Banco Bilbao Vizcaya Argentaria (Spanish bank)
• BBYO – B'nai B'rith Youth Organization

• BC
  • (i) Before Christ
  • Blind Copy (in emailers)
  • Boston College
  • (s) Botswana (FIPS 10-4 country code; from Bechuanaland)
  • British Columbia (postal symbol)
• BCA
  • (i) Bachelor of Computer Application
  • Black Coaches & Administrators
• BCC – (i) Blind Carbon Copy
• BCCI
  • (i) Bank of Credit and Commerce International
  • Board of Control for Cricket in India
• BCD – (i) Binary-Coded Decimal
• BCE
  • (i) Banque centrale européenne (French, "European Central Bank")
  • Battlefield Co-ordination Element
  • BC Electric, a former name for BC Hydro
  • Before Common Era
• BCER – (i) British Columbia Electric Railway
• BCFG – (s) Patchy Fog (METAR Code)
• BCIS (fratricide avoidance system) – (i) Battlefield Combat Identification System
• BCLL – (a) Bibliography of Celtic Latin Literature
• BCOL – (i) British Columbia Railway
• BCPL – (i) Basic Combined Programming Language (progenitor of C)
• BCS
  • (i) Bachelor of Computer Science
  • Bardeen, Cooper, and Schrieffer superconduction theory
  • Bowl Championship Series (US college football)
• BCT – (i) Brigade Combat Team

• BD
  • (s) Bangladesh (ISO 3166 digram)
  • Bermuda (FIPS 10-4 territory code)
• BDA – (i) British Dental Association
• BDD
  • (i) Body Dysmorphic Disorder
  • British Defence Doctrine
• Bde – (s) Brigade
• BDFL – (i) Benevolent Dictator For Life
• BDI – (s) Burundi (ISO 3166 trigram)
• BDNF – (i) Brain-Derived Neurotrophic Factor
• BDO – (i) Battle Dress Overgarment
• BDOS – (a) Basic Disk Operating System; part of CP/M
• BDS
  • (i) – Bachelor of Dental Surgery
  • Boycott, Divestment and Sanctions, a movement advocating various boycotts of Israel in the context of the Arab–Israeli conflict
• BDSM – (i) Bondage and Discipline, Domination and Submission, Sadism and Masochism
• BDT
  • (s) Bangladeshi taka (ISO 4217 currency code)
  • (i) Bureau de développement des télécommunications (Telecommunication Development Bureau, became ITU-D)
• BDU – (i) Battle-Dress Uniform

• be – (s) Belarusian language (ISO 639-1 code)
• Be – (s) Beryllium
• BE – (s) Belgium (FIPS 10-4 country code; ISO 3166 digram)
• BEA
  • (i) Banque extérieure d'Algérie
  • British European Airways (ancestor of British Airways)
  • British Electricity Authority
• bel – (s) Belarusian language (ISO 639-2 code)
• BEL – (s) Belgium (ISO 3166 trigram)
• BEM – (i) British Empire Medal – Bug-Eyed Monster
• ben – (s) Bengali language (ISO 639-2 code)
• BEN – (s) Benin (ISO 3166 trigram)
• BEO – (i) Banquet Event Order
• BERC – (a) Business Environmental Resource Center
• BER – (i) Bit Error Rate
• BES
  • (i) Budget Estimate Submission
  • (s) Caribbean Netherlands (ISO 3166 trigram; from the entity's alternate name of Bonaire, Sint Eustatius and Saba)
• BESS – (i) Business, Education, and Social Sciences
• BET – (a/i) Black Entertainment Television
• BETS – (a) Bradley Embedded Training System
• BEV
  • (i) Battery electric vehicle
  • Black English Vernacular, a type of English spoken by many African Americans
  • Bundesamt für Eich- und Vermessungswesen (German: "Federal Office of Metrology and Surveying"), Austrian government agency

• BF – (s) The Bahamas (FIPS 10-4 country code) – Burkina Faso (ISO 3166 digram)
• b/f – (p) before
• BFA – (s) Burkina Faso (ISO 3166 trigram)
• BfArM – (i) Bundesinstitut für Arzneimittel und Medizinprodukte, German governmental institute for drugs and medical devices
• BFF – (i) Best Friends Forever
• BFI – (a) British Film Institute
• BFR – (a) Biennial flight review
• BFR – (i) Brominated Flame Retardant
• BFS – (s) Belfast International Airport (IATA airport code)
• BFSA – (i) Blue Force Situation Awareness
• BFT – (i) Blue Force Tracking
• BFX – (s) Bioinformatics

• bg – (s) Bulgarian language (ISO 639-1 code)
• BG – (s) Bangladesh (FIPS 10-4 country code) – (i) Battle Group – Body Guard – (s) Brigadier General – (s) Bulgaria (ISO 3166 digram)
• BGA – (i) Ball Grid Array – Brandy and Ginger Ale (alcoholic beverage)
• BGD – (s) Bangladesh (ISO 3166 trigram)
• BGN – (i) U.S. Board on Geographic Names – (s) Bulgarian lev (ISO 4217 currency code)
• BGR – (s) Bulgaria (ISO 3166 trigram)
• BGS – (i) Bristol Grammar School – British Geological Survey
• BGWG – (p) Battle Group Wargame (military simulation; "big wig")

• bh – (s) Bihari languages (ISO 639-1 code)
• Bh – (s) Bohrium
• BH
  • (s) Bahrain (ISO 3166 digram)
  • Belize (FIPS 10-4 country code)
• BHD – (s) Bahraini dinar (ISO 4217 currency code)
• BHR – (s) Bahrain (ISO 3166 trigram)
• BHS
  • (i) British Home Stores
  • (s) The Bahamas (ISO 3166 trigram)

• bi – (s) Bislami language (ISO 639-1 code)
• Bi – (s) Bismuth
• BI – (s) Burundi (ISO 3166 digram)
• BIAP – (a) Baghdad International Airport – (p) Biafran pound
• BICS – (i/a) Battlefield Information and Communication System
• BID – (i) bis in die (Latin, "twice a day")
• BIDST – (i) British Institute of Dental and Surgical Technologists
• BIF – (s) Burundian franc (ISO 4217 currency code)
• bih – (s) Bihari languages (ISO 639-2 code)
• BIH – (s) Bosnia and Herzegovina (ISO 3166 trigram)
• BIOS – (a) Basic Input/Output System – British Institute of Organ Studies
• BIP – (a) Battlefield Interoperability Programme (ancestor of MIP) – Broadcast incremental power algorithm
• bis – (s) Bislami language (ISO 639-2 code)
• BISEPS – (a) Battlefield Identification System Environment Performance Simulation
• BIST – (a) Built-In Self-Test
• BIT – (a) Bilateral Investment Treaty – Built-In Test
• BITE – (a) Built-In Test Equipment

• BJ – (s) Benin (ISO 3166 digram) – (i) Blowjob (oral sex)
• BJJ – (i) Brazilian Jiu-Jitsu
• BJP – (i) Bharatiya Janata Party (Indian People's Party)
• BJT – (i) Bipolar Junction Transistor

• Bk – (s) Berkelium
• BK
  • (i) Burger King
  • (p) Bankrupt (most often seen as "gone BK")
  • (s) Bosnia and Herzegovina (FIPS 10-4 country code)
• BKN – (s) Broken Sky (METAR Code)

• BL
  • (s) Bolivia (FIPS 10-4 country code)
  • (i) British Leyland
• BLCSE – (i) Battle Laboratory Constructive Simulation Environment
• BLDU – (s) Blowing Dust (METAR Code)
• BLEVE – (a) Boiling Liquid Expanding Vapour Explosion ("blevy")
• BLK – (i) Basket Liga Kobiet (Polish, "Women's Basketball League")
• BLM – (a) Black Lives Matter
• BLOB – (p) Binary Large OBject
• BLR – (s) Belarus (ISO 3166 trigram)
• BLSA – (s) Blowing Sand (METAR Code)
• BLRSI – Battle Lab Reconfigurable Simulator (U.S. Army)
• BLSN – (s) Blowing Snow (METAR Code)
• BLT – (i) Bacon Lettuce Tomato (sandwich)
• BLUFOR – (p) Blue Force(s) (military)
• BLUI – (a/i) Body Language User Interface ("blooie")
• BLZ – (s) Belize (ISO 3166 trigram)

• bm – (s) Bambara language (ISO 639-1 code)
• BM – (i) Battle Management – (s) Bermuda (ISO 3166 digram) – Myanmar (FIPS 10-4 country code; from Burma)
• BMA – (i) British Medical Association
• BMCC – (i) Borough of Manhattan Community College
• BMD – (i) Ballistic Missile Defence – (s) Bermudian dollar (ISO 4217 currency code) – (i) Boyevaya Mashina Desanta (Russian Боевая Машина Десанта, "Combat Vehicle Airborne") †^[2] – British Military Doctrine
• BMDG – (i) British Military Doctrine Group
• BMDO – (i) (U.S.) Ballistic Missile Defense Organization ("bim-do")
• BME – (p) Biomedical Engineering – (i) Black and Minority Ethnic group – Body Modification E-zine
• BMEWS – (a/i) Ballistic Missile Early Warning System ("bee-mews")
• BMI – (i) Body Mass Index – Broadcast Music Incorporated - British Midland International
• BMG – (i) Bertelsmann Music Group
• BML – (i) Battle Management Language
• BMNT – (i) Begin Morning Nautical Twilight
• BMP – (i) Boyevaya Mashina Pekhoti (Russian Боевая Машина Пехоты, "Combat Vehicle for the Infantry") †^[2]
• BMR – (i) Basal metabolic rate – Bronirovannaya Mashina Razminirovaniya (Russian Бронированная Машина Разминирования, "Armoured Vehicle for Mine-Clearing") †^[2]
• BMU – (s) Bermuda (ISO 3166 trigram)
• BMW – (i) Bayerische Motoren Werke (German, "Bavarian Motor Works")
• BMX – (i) Bicycle/Bike Moto (r) Cross

• bn – (s) Bengali language (ISO 639-1 code)
• Bn – (s) Battalion
• BN 
  • (s) Brunei (ISO 3166 digram; FIPS 10-4 country code)
  • (i) Barisan Nasional (Malaysia)
  • (i) Burlington Northern
• BND – (s) Brunei dollar (ISO 4217 currency code)
• BnF – (i) Bibliothèque nationale de France (French, "National Library of France")
• BNF
  • (i) Backus–Naur form (computing)
  • British National Formulary
• BNICE – (a) Biological, Nuclear, Incendiary, Chemical, and Explosive Agents
• BNP
  • (i) British National Party
  • Banque Nationale de Paris, a predecessor to today's BNP Paribas
• BNS – (i) Scotiabank, formerly Bank of Nova Scotia
• BNSF – (i/s) Burlington Northern Santa Fe (also AAR reporting mark)

• bo – (s) Tibetan language (ISO 639-1 code)
• BO
  • (i) Back Orifice
  • (i) Baltimore and Ohio Railroad
  • (s) Belarus (FIPS 10-4 country code)
  • (i) Biarritz Olympique (French rugby union club)
  • (s) Bolivia (ISO 3166 digram)
  • (i) Body odor
• BO2k – (i) Back Orifice 2000
• BOAC – (i) British Overseas Airways Corporation (predecessor of British Airways)
• BoAML – Bank of America Merrill Lynch
• BOAT – (p) Byway Open to All Traffic (pronounced as two syllables, "Bo-At")
• BOB – (s) boliviano (ISO 4217 currency code) - Bank One Ballpark
• BOBFOC – (a) Body Off Baywatch, Face Off Crimewatch (description)
• BOBFOK – (a) Body of Barbie, face of Ken (description)
• BOC
  • (i) British Orthodontic Society
  • BOC
• BÖC – (i) Blue Öyster Cult
• bod – (s) Tibetan language (ISO 639-2 code)
• BOD – (i) Biochemical Oxygen Demand
• BODMAS – (a) Brackets, Orders, Division, Multiplication, Addition, Subtraction
• BOFH – (i) Bastard Operator From Hell
• BOGA – (a) Bend Over and Grab Ankles
• BOGOF – (a) Buy One, Get One Free
• BOGSAT – (a) Bunch Of Guys Sitting Around a Table
• BOHICA – (a) Bend Over Here It Comes Again
• BOI
  • (i) Balance Of Investment
  • Basis Of Issue
• BOL – (s) Bolivia (ISO 3166 trigram)
• BOM
  • (a) Base Object Model
  • Bill Of Materials
  • Block of the Month quilting term
  • Business opportunity meeting
• BOP (more than 20 alternatives)
  • (i) Balance of Payments
• BOPB – (i) Biarritz Olympique Pays Basque (the complete name of the rugby club)
• BOPD – (i) Barrel of Oil Per Day
• BOQ
  • (i) Bill Of Quotations
  • Bachelor Officers' Quarters
  • Bank of Queensland
• bos – (s) Bosnian language (ISO 639-2 code)
• BOS – (i) Battlefield Operating System
• BOT
  • (i) Balance of Trade
  • (s) Botswana (IOC and FIFA trigram, but not ISO 3166)
  • (i) Build Operate Transfer
  • (i) Bank of Thailand

• BP
  • (i) Battle Position
  • British Petroleum (today, BP does not officially stand for anything)
  • (s) Solomon Islands (FIPS 10-4 country code; from British Protectorate of the Solomon Islands)
• Bp – (i) Bishop
• BPD – (i) Bipolar Personality Disorder
• BPM – (i) Beats Per Minute
• BPMo – (i) Business Process Mobility
• BPV
  • (i) Battlefield Planning Visualization
  • Bovine papillomavirus

• BQ
  • (s) 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)

• br – (s) Breton language (ISO 639-1 code)
• Br – (s) Bromine
• Br – "Best regards" used in valediction
• BR
  • (s) Brazil (ISO 3166 digram; FIPS 10-4 country code) – Bihar (Indian state code)
  • (i) British Rail, previously British Railways
  • Break Ranks (marching band term)
• BRA – (s) Brazil (ISO 3166 trigram)
• BRAG – (a) Bicycle Ride Across Georgia
• BRASS – Breathe, Relax, Aim, Sight, Squeeze (Acronym for using a rifle)
• BRB
  • (s) Barbados (ISO 3166 trigram)
  • (i) "Be Right Back" (Internet chat abbreviation)
• BRDM – (i) Boyevaya Razvedyvatelnaya Dosornaya Mashina (Russian Боевая Разведывательная Дозорная Машина, "Combat Reconnaissance Patrol Vehicle") †^[2]
• bre – (s) Breton language (ISO 639-2 code)
• BRFSS – (p) Behavioral Risk Factor Surveillance System ("burf-us", a CDC health survey covering the U.S. and its territories)
• BRI
  • (i) Bathroom Readers Institute (publishers of series of "Uncle John's Bathroom Readers" books)
  • Belt and Road Initiative (China-led Asian transport initiative)
• BRIC – (a) Brazil, Russia, India and China
• BRICS – (a) Brazil, Russia, India, China and South Africa
• BRIMS – (a) Behavior Representation In Modeling and Simulation (conference)
• BRL – (s) Brazilian real (ISO 4217 currency code)
• BRM – (i) Boyevaya Razvedyvatelnaya Mashina (Russian Боевая Разведывательная Машина, "Combat Reconnaissance Vehicle") †^[2]
• BRN
  • (s) Bahrain (IOC trigram, but not FIFA or ISO 3166)
  • (s) Brunei (ISO 3166 trigram)
• BRSB – (i) Battlefield Reasoning System Brianna
• BRT – Bus Rapid Transit (alternatively Bus Rapid Transport)
• BRU – (s) Brunei (IOC and FIFA trigram, but not ISO 3166)

• bs – (s) Bosnian language (ISO 639-1 code)
• BS
  • (s) The Bahamas (ISO 3166 digram)
  • Bassas da India (FIPS 10-4 territory code)
  • Bachelor of Science degree
  • British subject
  • Bullshit
• BSA
  • (i) Birmingham Small Arms (motorcycles company)
  • Boy Scouts of America
  • Brigade Support Area
• BSatCoP – Benjamin Sniddlegrass and the Cauldron of Penguins
• BSc
  • Bachelor of Science degree
• BSD
  • (s) Bahamian dollar (ISO 4217 currency code)
  • (i) Berkeley Software Distribution (distinct from BSoD)
• BSE – (i) Bovine Spongiform Encephalopathy, better known as mad cow disease
• BSE – (i) Buku Sekolah Elektronik (screw thread),^[3]
• BSF – (i) British Standard Fine (screw thread)
• BSL
  • (i) Basketbol Süper Ligi (Turkish, "Basketball Super League"; top Turkish men's league)
  • British Sign Language
• BSMB – (i) British Society for Matrix Biology
• BSN
  • Baloncesto Superior Nacional (Spanish, "National Superior Basketball"; top Puerto Rican league)
  • Bank Simpanan Nasional (Malay, "National Savings Bank"; government-owned Malaysian bank)
• BSNL
  • Bharat Sanchar Nigam Limited
  • (i) Bachelor of Science in Nursing
• BSoD – (i) Blue Screen of Death (distinct from BSD)
• BSP
  • (i) Between-Show Promotion
  • Binary Space Partitioning
  • Board Support Package
  • British Standard Pipe (screw thread)
  • (p) Business-sponsored
  • Bone sialoprotein
• BSS
  • Block Starting with Symbol – see .bss
  • Boxed Set Syndrome – where one starts watching a boxed set of DVDs and just can't stop until you've watched them all
• BST
  • (i) Binary search tree
  • Blended Sales Tax
  • (p) Bovine somatotropin
  • (i) British Summer Time
• BSW
  • Bachelor of Social Work degree
  • (i) British Standard Whitworth (screw thread)
  • Blind Spot Warning, see Blind spot monitor
• BSX – (i) Bendigo Stock Exchange

• Bt
  • (i) Baronet
  • Bacillus thuringiensis
• BT
  • (i) Baal teshuva (Hebrew, "master of return") – used to describe a Jew who adopts Orthodox Judaism as an adult
  • Bathythermograph
  • (s) Bhutan (FIPS 10-4 country code; ISO 3166 digram)
  • (i) BitTorrent
  • British Telecom, the former name of the company now known as BT Group
  • Bluetooth
• BTDT – (i) Been There, Done That
• Bti – (i) Bacillus thuringiensis israelensis
• BTID – (i) Battlefield Target Identification Device
• BTIS – (i) Battlefield Target Identification System
• BTN
  • (s) Bhutan (ISO 3166 trigram)
  • Bhutanese ngultrum (ISO 4217 currency code)
• BTO – (i) Built To Order
• BTP – (i) British Transport Police
• BTR – (i) Bronetransporter (БТР = Бронетранспортер "(Heavy) Armoured (Personnel) Transporter") †^[2]
• BTS
  • (p) Bangtan Sonyeondan (Korean, 방탄소년단; literally "Bulletproof Boy Scouts"), expansion of the name of South Korean band BTS
  • (i) Base transceiver station
  • Beyond the Scene, promoted by the band BTS as an alternate expansion of its initialism
  • Build to stock (production approach)
  • Bureau of Transportation Statistics, U.S. federal agency
  • Business Training Systems, original name of the Swedish professional services firm BTS Group
• BTU – (i) British Thermal Unit
• BTW – (s) By The Way

• BU – (s)
  • Bulgaria (FIPS 10-4 country code) –
  • Burma (ISO 3166 digram; obsolete since 1989)
• BUAV – (i) British Union for the Abolition of Vivisection
• BUG-E – (a) Battlefield Universal Gateway Equipment ("buggy")
• bul – (s) Bulgarian language (ISO 639-2 code)
• BUL – (s) Bulgaria (IOC and FIFA trigram, but not ISO 3166)
• BUNO or BuNo – (p) Bureau Number (aircraft serial number)
• BUR – (s) Burma (ISO 3166 trigram; obsolete since 1989)

• BV – (i)
  • Background Vocals –
  • Battlefield Visualization – (s)
  • Bouvet Island (ISO 3166 digram; FIPS 10-4 territory code)
• BVB
  • (p) Ballspielverein Borussia 09 e.V. Dortmund, the full German name of the football club known in English as Borussia Dortmund
  • Bursa de Valori București (Romanian for Bucharest Stock Exchange)
• BVD – (i) Bradley, Voorhees & Day (underwear manufacturer)
• BVR – (i) Beyond Visual Range
• BVT – (s) Bouvet Island (ISO 3166 trigram)

• B&W – (i) Babcock & Wilcox – Black and White – Bowers & Wilkins
• BW – (s) Bring Wedges (ISO digram)
• BW – (s) Botswana (ISO 3166 digram)
• BWA – (s) Botswana (ISO 3166 trigram)
• BWARS – (a) Bees, Wasps & Ants Recording Society
• BWC – (p) Biological and Toxin Weapons Convention
• BWP – (s) Botswana pula (ISO 4217 currency code)
• BWR – (i) Boiling-Water Reactor

• BX – (p) Base eXchange – (s)

• BY – (s)
  • Burundi (FIPS 10-4 country code) –
  • Belarus (ISO 3166 digram)
• BYOB – (i) Bring Your Own Bottle (or "beer", "beverage", or "booze") (multiple, but similar, meanings)
• BYOC – (i) Bring Your Own Computer (play on BYOB)
• BYOF – (i) Bring Your Own Flask
• BYR – (s) Belarusian rubel (ISO 4217 currency code)
• BYS – (s) Byelorussian Soviet Socialist Republic (ISO 3166 trigram; obsolete since 1992)
• BYU – (i) Brigham Young University

• BZ – (s) Belize (ISO 3166 digram)
• BZD – (s) Belize dollar (ISO 4217 currency code)
• BZP – (p) Benzylpiperazine