| Abbreviation | Definition |
|---|---|
| BRAC | Base Relocation And Closure |
| BRAP | Bi-lateral Research Activities Programme |
| BRAP | Bioterrorism Readiness and Action Plan |
| BRASS | Border Release Advanced Screening and Selectivity |
| BRASS | Budget Reporting and Analysis Support System |
| BRB | Benefits Review Board |
| BRD | Biological Resources Division of the United States Geological Service |
| BRD | Board |
| BRDR | Border |
| BREN | Bare Reactor Experiment, Nevada |
| BrigGen | Brigadier General - USAF |
| BRO | Building Responsible Officer |
| BROTHER | Black Rhyme Organisation To Help Equal Rights |
| BRS | Board Review Series |
| BS | Blowing Smoke |
| BS | Bolshevik Storytelling |
| BS | Buzzword Saturation |
| BSA | Bad Scope Altogether |
| BSAAG | Bank Secrecy Act Advisory Group |
| BSC | Business Service Center |