| Abbreviation | Definition |
|---|---|
| BSA | British Sociological Association |
| BSA | Bulgarian Studies Association |
| BSA | Bund Schweizer Architekten |
| BSA | Fdration des Architectes Suisses |
| BSA | Fédération des Architectes Suisses |
| BSA | Federation of Swiss Architects |
| BSA | Federazione Architetti Svizzeri |
| BSAC | British Society for Antimicrobial Chemotherapy |
| BSAE | Belgian Society of Association Executives |
| BSAT | Boston Society for Advanced Therapeutics |
| BSB | British Society of Baking |
| BSBC | Bromeliad Society of Broward County |
| BSBI | Botanical Society of Britain and Ireland |
| BSBI | Botanical Society of the British Isles |
| BSBP | Bolton Society for Blind People |
| BSBR | British Society of Breast Radiology |
| BSBS | Badger State Boating Society |
| BSBS | British Skull Base Society |
| BSBS | Bulgarian Society for British Studies |
| BSC | Bibliographical Society of Canada |