| B | Billion✓ Verified | Measurement Unit, Number, Number System |
| B | Branch✓ Verified | Business, Software Engineering |
| BAR | Beverage Alcohol Resource✓ Verified | Education, Training |
| BBB | Better Business Bureau✓ Verified | Business, Organization |
| BC | Before Christ✓ Verified | Measurement Unit, Time |
| BCA | Bahamas Cricket Association✓ Verified | Association, Organization, Sports, Cricket |
| BCA | Bahrain Cricket Association✓ Verified | Association, Organization, Sports, Cricket |
| BCA | Botswana Cricket Association✓ Verified | Association, Organization, Sports, Cricket |
| BCA | Brazilian Cricket Association✓ Verified | Association, Organization, Sports, Cricket |
| BCAS | Bureau of Civil Aviation Security✓ Verified | Agency, Government, Policy, Air Transport |
| BCB | Bangladesh Cricket Board✓ Verified | Organization, Sports, Cricket |
| BCB | Bermuda Cricket Board✓ Verified | Organization, Sports, Cricket |
| BCCB | Bhutan Cricket Council Board✓ Verified | Organization, Sports, Cricket |
| BCCI | Board of Control for Cricket in India✓ Verified | Organization, Cricket |
| BCD | Basic Customs Duty✓ Verified | Country, Finance, Taxation |
| BCF | Belgian Cricket Federation✓ Verified | Organization, Sports, Cricket |
| BCF | Bulgaria Cricket Federation✓ Verified | Organization, Sports, Cricket |
| BDNCA | Brunei Darussalam National Cricket Association✓ Verified | Organization, Sports, Cricket |
| BDO | Banco de Oro✓ Verified | Bank |
| BEL | Bharat Electronics Limited✓ Verified | Company, Military, Defence, Manufacturing |
| BF | BeamForm✓ Verified | Communication, Telecommunication, Technology |
| BFHB | Big Fat Hairy Bollocks | Others |
| BHEL | Bharat Heavy Electricals Limited✓ Verified | Company, Engineering |
| BHISHM | Bharat Health Initiative for Sahyog, Hita and Maitri✓ Verified | Government, Disaster, Facility, Health, Medical, Program |
| BHMS | Business & Hotel Management School✓ Verified | Education, Institute |
| BI | Business Intelligence✓ Verified | Business, Software, Analytics Software, Analytics |
| BMKJ | Bharat Mata ki Jai✓ Verified | Slang |
| BN | Billion✓ Verified | Measurement Unit, Number, Number System |
| BNCA | Belize National Cricket Association✓ Verified | Association, Organization, Sports, Cricket |
| BOF | Bottom of the Funnel (also known as BOFU)✓ Verified | Marketing, Sales |
| BPD | Business Process Diagram✓ Verified | Business, Process |
| BPI | Bank of the Philippine Islands✓ Verified | Bank |
| BPO | Business Process Outsourcing✓ Verified | Business, Industry |
| BRB | Be Right Back✓ Verified | Internet, Slang, Social Media |
| BRN | Branch✓ Verified | Business, Banking, Software Engineering |
| Brunch | Breakfast + Lunch✓ Verified | Event, Food |
| BSE | Bombay Stock Exchange✓ Verified | Company, Finance, Stock Exchange, Stocks and Trading |
| BSS | Business Support System✓ Verified | Business, Industry, Telecommunication, Software |
| BTC | Bodoland Territorial Council✓ Verified | Association, Government, Organization |
| BTW | By The Way✓ Verified | Communication, Internet, Slang |
| BYOB | Bring Your Own Bottle✓ Verified | Lifestyle, Slang, Social Events |