AAR
| Association of American Railroads | 2 |
ARR
| Alaska Railroad | 1 |
CN
| Canadian National Railways | 1 |
CNJ
| Central Rail Road of New Jersey | 1 |
CNW
| Chicago & Northwestern | 1 |
DAFX
| Department of Defence Troop Support and Aviation Material Re | 1 |
DLMX
| Daylight Locomotives and Machine Works Incorporated | 1 |
DOTX
| USDOT/Federal Railroad Administration | 1 |
GN
| Great Northern | 3 |
NERR
| Nashville and Eastern | 1 |
NO
| NO | 1 |
PSBX
| PSBX | 1 |
UPP
| Union Pacific Passenger | 1 |
USAX
| United States Army | 2 |