AMTK
| Amtrak | 1 |
APTX
| Air Products and Chemicals Incorporated | 3 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BN
| Burlington Northern | 9 |
CO
| Chesapeake & Ohio | 2 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 5 |
DH
| Delaware & Hudson | 2 |
DL
| Delaware-Lackawanna Railroad Company | 2 |
DLW
| Delaware Lackawanna & Western | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
EPTC
| East Portland Traction | 1 |
FWD
| Fort Worth & Denver | 1 |
GN
| Great Northern | 1 |
KCS
| Kansas City Southern | 1 |
MILW
| Milwaukee Road | 2 |
MKT
| Missouri-Kansas-Texas | 1 |
NYC
| New York Central | 1 |
OPR
| Oregon Pacific | 1 |
PRR
| Pennsylvania Railroad | 2 |
RDG
| Reading Railroad | 1 |
RJCR
| RJ Corman | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 1 |
SP
| Southern Pacific | 3 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 1 |