| Abbreviation | Definition |
|---|---|
| BPSA | Bio Process Systems Alliance |
| BPSA | Bio Processing Systems Alliance |
| BQA | Baylor Quality Alliance |
| BQAC | Bisexual Queer Alliance Chicago |
| BRA | Batey Relief Alliance |
| BRA | Brittany Rubin Alliance |
| BRACE | Be Ready Alliance Coordinating for Emergencies |
| BRBA | Brazos River Bottom Alliance |
| BRWA | Battle River Watershed Alliance |
| BRWA | Beaver River Watershed Alliance |
| BRWA | Buffalo River Watershed Alliance |
| BSAA | Bioterrorism Security Assessment Alliance |
| BSAI | Black Student Alliance Invitational |
| BSIA | Black Sea Information Alliance |
| BSSA | Bioterrorism Security Assessment Alliance |
| BTA | Border Trade Alliance |
| BTAA | Big Ten Academic Alliance |
| BTAA | Black Theater Alliance Awards |
| BTAF | Border Trade Alliance Forum |
| BUWA | Beneficial Use Water Alliance |