ASFX
| American Steel Foundries | 1 |
CN
| Canadian National Railways | 1 |
DOTX
| USDOT/Federal Railroad Administration | 1 |
GPEX
| General American Pfaudler | 1 |
IC
| Illinois Central | 3 |
NKP
| Nickel Plate | 1 |
NW
| Norfolk & Western | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 1 |