| Abbreviation | Definition |
|---|---|
| BRO | Baltics, Russia, and Other countries |
| BRTC | Bangladesh Road Transport Corporation |
| BS | Bahamas |
| BSSR | Belarusian Soviet Socialist Republic |
| BT | Bhutan |
| BUL | Bulgaria |
| BUR | Burundi |
| BV | Bouvet Island |
| BVI | British Virgin Islands |
| BW | Botswana |
| BWA | Botswana |
| BWI | British West Indies |
| BY | Belarus |
| BZ | Belize |
| BZ | Brazil |
| C | Celtic |
| CAM | Cambodia |
| CASC | Central Asia South Caucasus |
| CC | Cocos (Keeling) Islands |
| CCAFS | Climate Change, Agriculture, and Food Security |