| Abbreviation | Definition |
|---|---|
| BASA | Bay Area Soaring Associates |
| BASo | BAILA Society |
| BAVC | Bay Area Video Coalition |
| BAVC | Bruderhilfe e.V. Automobil- und Verkehrssicherheitsclub |
| BAVR | Bay Area Vintage Riders |
| BBB | Brushback Baseball |
| BBC | British Bacardi Circumstances |
| BCC | Beckenham Cycle Club |
| BCC | Bottom Coil Clearomizer |
| BCC | British Caravanners Club |
| BCCG | Beckett Collectors Club Grading |
| BCCGC | Bay County Council of Garden Clubs |
| BCHS | Berkeley County Huguenot Society |
| BCLA | Book Collectors of Los Angeles |
| BCMT | Bike, Car, Motorcycle Touring |
| BCPS | British Columbia Philatelic Society |
| BDA | Beer Drinkers of America |
| BDCC | Blue Danube Cat Club |
| BDCC | Bournemouth District Car Club |
| BDCC | Bournemouth & District Car Club |