ACWR
| Aberdeen, Carolina & Western | 1 |
AMTK
| Amtrak | 3 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BO
| Baltimore & Ohio | 2 |
CHRX
| The Chesapeake Division | 1 |
CN
| Canadian National Railways | 1 |
DSB
| DSB | 1 |
GSMR
| Great Smoky Mountains | 1 |
HVSR
| Hocking Valley Scenic | 1 |
INCO
| INCO | 3 |
MARC
| Maryland Transit Administration | 1 |
MRLX
| Mid America Rail Car Leasing | 1 |
NS
| Norfolk Southern | 1 |
PCRC
| Panama Canal Railway Company | 2 |
PPCX
| AAPRCO Register Private Cars | 1 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
RNRH
| RNRH | 1 |
SBVR
| South Branch Valley Rail Road | 1 |
SLRG
| San Luis and Rio Grande Railroad | 1 |
SNCF
| French National Railways | 1 |
SP
| Southern Pacific | 1 |
UP
| Union Pacific Railroad Company | 3 |
USAX
| United States Army | 1 |
VIA
| Via Rail Canada | 4 |
WS
| Ware Shoals RR | 2 |
WSRR
| WSRR | 4 |
ZB
| ZB | 1 |