| Abbreviation | Definition |
|---|---|
| BBADI | Bonnie Bergen Assistance Dog Institute |
| BBBS | Big Brothers Big Sisters |
| BBBSA | Big Brothers Big Sisters of America |
| BBBSI | Big Brothers Big Sisters International |
| BBC | Better Benefits Coalition |
| BBF | Bible Believers Fellowship |
| BBF | Billy Barty Foundation |
| BBL | Building Better Lives |
| BBNA | Balmy Beach Neighbourhood Association |
| BBPP | Bioko Biodiversity Protection Programme |
| BBR | Black Beauty Ranch |
| BBSM | Board of Behavioral Sleep Medicine |
| BBU | Back Bay United |
| BBU | Burn Buddies United |
| BCA | Blood Center of America |
| BCA | Breast Cancer Action |
| BCA | Brooklyn College Association |
| BCAA | British Columbia Automobile Association |
| BCAP | Bhutanese Community Association of Pittsburgh |
| BCAP | Birmingham Cultural Alliance Partnership |