# 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)

## Contents

* Top
* B0–9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ
* B – (s) Bel – Boron

## B0–9

* 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

* 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

* 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
* 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

* 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

* 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

* 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

* 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

* 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

* 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

* 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

* 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

* 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

* 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")
* BLW – (s) Below (METAR Code)
* BLZ – (s) Belize (ISO 3166 trigram)

## BM

* 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") † – 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") †
* BMR – (i) Basal metabolic rate – Bronirovannaya Mashina Razminirovaniya (Russian Бронированная Машина Разминирования, "Armoured Vehicle for Mine-Clearing") †
* BMU – (s) Bermuda (ISO 3166 trigram)
* BMW – (i) Bayerische Motoren Werke (German, "Bavarian Motor Works")
* BMX – (i) Bicycle/Bike Moto (r) Cross

## BN

* 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

* 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

* 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

* 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

* 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") †
* 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
* BRIDGE – Building Resilienmce through Inclusively Designed Guidance and Education
* 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") †
* 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

* 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),
* 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

* 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") †
* 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

* 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

* 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)

## BW

* 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

* BX – (p) Base eXchange – (s)

## BY

* 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

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