ACWR
| Aberdeen, Carolina & Western | 7 |
AR
| Aberdeen and Rockfish | 9 |
ATSF
| Atchison Topeka & Santa Fe | 4 |
BN
| Burlington Northern | 7 |
BO
| Baltimore & Ohio | 1 |
CHRX
| The Chesapeake Division | 3 |
CNW
| Chicago & Northwestern | 2 |
CO
| Chesapeake & Ohio | 9 |
CP
| Canadian Pacific Railway | 3 |
CR
| Conrail | 9 |
CSOR
| Connecticut Southern | 1 |
CSS
| Chicago South Shore And South Bend | 2 |
CSX
| CSX Railroad | 2 |
EJE
| Elgin Joliet and Eastern | 1 |
GEGX
| GE Gas Turbine | 1 |
IC
| Illinois Central | 4 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 1 |
LM
| Litchfield & Madison | 1 |
LMIX
| Loram Maintenance of Way Inc. | 6 |
MB
| Meridian & Bigbee | 2 |
MILW
| Milwaukee Road | 1 |
MP
| Missouri Pacific | 8 |
MRL
| Montana Rail Link | 4 |
MRS
| Manufacturers Railway | 2 |
NKP
| Nickel Plate | 3 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 6 |
NYC
| New York Central | 2 |
PRR
| Pennsylvania Railroad | 4 |
RNCX
| North Carolina Dept Of Transportation | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 1 |
SBD
| Seaboard System | 6 |
SCIH
| South Chicago & Indiana Harbor Railway C | 4 |
SCL
| Seaboard Coast Line | 1 |
SLSF
| Saint Louis-San Francisco | 2 |
SOO
| Soo Line | 1 |
SOU
| Southern | 6 |
SP
| Southern Pacific | 2 |
TC
| Temple & Central Texas | 1 |
TCRX
| Tennessee Central Railway Musem | 4 |
UP
| Union Pacific Railroad Company | 7 |
VGN
| Virginian Railway | 3 |
WLE
| WLE | 2 |
WM
| Western Maryland | 1 |