| Abbreviation | Definition |
|---|---|
| BNPZ | Pacific Rail Services |
| BNQ | Burlington Northern and Santa Fe Railway Company |
| BNQ | Burlington Northern Railroad (BNSF Railway) |
| BNR | Bengal Nagpur Railway |
| BNRQ | Burlington Northern and Santa Fe Railway Company |
| BNRQ | Burlington Northern Railroad (BNSF Railway) |
| BNRZ | Burlington Northern and Santa Fe Railway Company |
| BNRZ | Burlington Northern Railroad (BNSF Railway) |
| BNSF | BNSF Railway |
| BNSF | Burlington Northern and Santa Fe Railway Company |
| BNSF | Burlington Northerns Secondary Franchise |
| BNXU | Burlington Northern Railroad (BNSF Railway) |
| BNZ | Burlington Northern and Santa Fe Railway Company |
| BNZ | Burlington Northern Railroad (BNSF Railway) |
| BO | Bad Order |
| BO | Baltimore and Ohio Railroad (CSX Transportation) |
| BO | CSX Transportation Incorporated |
| BOBX | Freeman Gas of N.C. |
| BOBX | Freeman Gas of N.C. Incorporated |
| BOCT | Baltimore and Ohio Chicago Terminal Railroad (CSX Transportation) |