| Acronym | Definition |
|---|
| BOSA➣Bootham Old Scholars' Association |
| BOSA➣Broomfield Old Students Association (Derbyshire College of Agriculture; UK) |
| BOSA➣Bataille Offensive pour la Suprématie Aérienne |
| BOSA➣Bannon Open Songwriting Awards |
| BOSA➣Bulletin on Sumerian Agriculture (journal) |