ACWR
| Aberdeen, Carolina & Western | 1 |
ATSF
| Atchison Topeka & Santa Fe | 6 |
BN
| Burlington Northern | 13 |
BNSF
| BNSF Railway | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CRIP
| Chicago Rock Island & Pacific | 1 |
DIM
| DIM | 1 |
DODX
| Department Of Defense | 6 |
DRGW
| Denver & Rio Grande Western | 3 |
NSRM
| NSRM | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 2 |
SP
| Southern Pacific | 1 |
UP
| Union Pacific Railroad Company | 5 |
UPP
| Union Pacific Passenger | 3 |
WPYR
| White Pass & Yukon Route | 2 |