| Abbreviation | Definition |
|---|---|
| BTC | Birmingham Terminal Company |
| BTCO | Boston Terminal |
| BTCO | Boston Terminal Company |
| BTCU | Bulkmatic Transport |
| BTCU | Bulkmatic Transport Co |
| BTCZ | Bulkmatic Transport |
| BTCZ | Bulkmatic Transport Company |
| BTEX | BTE Equipment |
| BTLZ | BTL Specialists (Intermodal Services Inc.) |
| BTLZ | Intermodal Services Incorporated |
| BTRX | Rocky Mountain Transportation Services |
| BTRX | Rocky Mountain Transportation Services (Inspiration Holdings) |
| BTS | Bangkok Transit System |
| BTTX | Trailer Train (TTX Corporation) |
| BTTX | TTX Company |
| BUDM | Badmal, India, Railway station code |
| BUDX | Budd |
| BUDX | Budd Company |
| BUDZ | Bud Antle |
| BUDZ | Bud Antle Incorporated |