| Abbreviation | Definition |
|---|---|
| BPSR | Brazilian Political Science Review |
| BPU | Birmingham Political Union |
| BR | Bandera Roja (Peruvian Communist Party) |
| BR | Buchi Ramaiah |
| BR | Burgess Roll |
| BRC | Black Radical Congress |
| BREXIT | British Exit |
| BRINO | BRexit In Name Only |
| BRN | Bunte Republik Neustadt |
| BRP | Baloch Republican Party |
| BRPA | Balochistan Republican Party Azad |
| BRSA | Belarusian Republican Scout Association |
| BRSP | Bahujan Republican Socialist Party |
| BRUCE | Bibligraphic Resources Under A Consortial Environment |
| BRY | Bogside Republican Youth |
| BSA | Bristol Socialist Alliance |
| BSCP | Business Social Cultural and Political |
| BSN | Bulgarian Socialist Nation |
| BSP | Bahenji Sabhkuch Party |
| BSP | Bahujan Samaj Party |