| Abbreviation | Definition |
|---|---|
| BRCY | Cando Contracting |
| BRCY | Cando Contracting Limited |
| BRE | Burlington Northern Railroad |
| BREL | British Rail Engineering Limited |
| BREX | Big Rivers Electric Corporation |
| BRFD | Branford Steam Railroad |
| BRG | Brownsville and Rio Grande International Railroad |
| BRIX | Incobrasa Industries (Union Tank Car) |
| BRIX | Incobrasa Industries, Limited |
| BRKX | Burke Energy Corporation |
| BRLX | BRS Leasing |
| BRME | Buckeye Rail Model Engineers |
| BRNU | Brun |
| BRNU | Brun S. A. |
| BRNZ | Comtrak |
| BRNZ | Comtrak Incorporated |
| BROU | Swedish Transocean Lines |
| BROU | Swedish Transocean Lines (T.S.B.) |
| BRR | Belton Railroad |
| BRR | Bootheel Regional Rail Corporation |