| Abbreviation | Definition |
|---|---|
| BRNG | Be Ready National Guard |
| BRO | Border Roads Organisation |
| BROADSWORD | Computer Assisted Division Level Battle Simulation |
| BRS | Binaural Room Scanning |
| BRT | Brigade Recon Troop |
| BRV | Battle Ready Vehicle |
| BRV | Brave |
| BRV | Bravo |
| BRWL | Bistatic Radar for Weapons Location |
| BS | Ballastic Shield |
| BS | Battle Staff |
| BS | Bottom Secret |
| BS | Broadcast Source |
| BSA | Base Support Area |
| BSA | Beach Support Area |
| BSA | Birmingham Small Arms |
| BSA | Bosnian Serb Army |
| BSA | Brigade Support Area |
| BSA | Brigade Support Aria |
| BSAB | Bellshill Salvation Army Band |