| Abbreviation | Definition |
|---|---|
| BRC | Budget Review Committee |
| BRCB | Bharatiya Rashtriya Congress Brigade |
| BRD | Business Requirements Document |
| BRDEC | Belvoir Research, Development, and Engineering Center |
| BRDG | Bridge |
| BRDL | Biomedical Research and Development Laboratory |
| BRDM | Bronevaya Razvedyvatelnaya Dosornaya Maschina (Russian: Armored Reconnaisance Vehicle) |
| BRE | BLOOD Rheology Experiment |
| BRF | Brigade Reconnaissance Force |
| BRF | British Reserve Force |
| BRGHD | Bridgehead |
| BRI | Basic Rate Interface |
| BRIL | Baseline Resource Item List |
| BRL | Ballistics Research Laboratory |
| BRL | Basic Recreational Leave |
| BRL | Brookings Research Laboratory |
| BRM | Basic Rifle Marksmanship |
| BRM | Buffer Recoil Mechanism |
| BRNCH | Assigned Branch |
| BRNG | Be Ready National Guard |