| Abbreviation | Definition |
|---|---|
| BIR | British and Irish Region |
| BIRAL | Bristol Industrial & Research Associates Ltd. (UK) |
| BIRO | British International Rowing Office |
| BISA | British and Irish Sound Archives |
| BISA | British Irish Sound Archives |
| BISB | British International School Brussels |
| BISC | British International School Cairo |
| BISC | British International School in Cairo |
| BISC | British International School in Casablanca |
| BISC | British International School of Charlotte |
| BISC | British International School of Chicago |
| BISH | British International School of Houston |
| BISHOP | British Intelligence Service Headquarters Operation Priest |
| BISJ | British International School of Jeddah |
| BISP | British and Irish Studies Program |
| BISP | British Irish Studies Program |
| BISRA | British Iron Steel Research Association |
| BISU | British International School Ukraine |
| BISW | British International School of Washington |
| BISZ | British International School of Zagreb |