| Abbreviation | Definition |
|---|---|
| BUGX | Bruggere and Monson |
| BUKX | Louisville Gas and Electric |
| BUKX | Louisville Gas and Electric Company |
| BUNX | The Buncher |
| BUNZ | Burnside International Trucks |
| BUNZ | Burnside International Trucks Limited |
| BVCX | Burgie Vinegar (West Coast Express) |
| BVCX | West Coast Express |
| BVE | Boso View Express |
| BVHX | B. V. Heddrick Gravel and Sand Company |
| BVHX | BV Heddrick Gravel and Sand |
| BVRY | Brandywine Valley Railroad |
| BVRY | Brandywine Valley Railroad Company |
| BVS | Bevier and Southern Railroad |
| BWC | Berwind Corporation (Conrail) |
| BWC | Consolidated Rail Corporation |
| BWCX | Borg-Warner Chemicals (GE Plastics) |
| BWCX | GE Plastics |
| BWI | Baltimore - Thurgood Marshall International Airport Rail Station |
| BWSR | Brockville, Westport, & Sault Ste. Marie Railway |