| Abbreviation | Definition |
|---|---|
| BSI | Blank Summer Institute, University of Iowa |
| BSL | British School of Language |
| BSL | British Sign Language |
| BSL | Business School Lausanne |
| BSLC | Biological Sciences Learning Center |
| BSM | Baptist Student Ministry |
| BSMMU | Bangabandhu Sheikh Mujib Medical University |
| BSMMU | Bangladesh Sheikh Mujib Medical University |
| BSP | Biology Scholars Program |
| BSP | Board of Student Publications |
| BSRB | Biomedical Sciences Research Building (UCLA) |
| BSSI | British Super-ultramodern Scientific Institution |
| BSTU | Belarusian State Technological University |
| BSTU | Brest State Technical University |
| BSTU | Bryansk State Technical University |
| BSU | Ball State University |
| BSU | Baptist Student Union |
| BSU | Bemidji State University |
| BSU | Best Summer University |
| BSU | Black Student Union |