BN
| Burlington Northern | 2 |
BO
| Baltimore & Ohio | 2 |
BPRR
| Buffalo and Pittsburgh | 1 |
CNW
| Chicago & Northwestern | 1 |
CO
| Chesapeake & Ohio | 2 |
CR
| Conrail | 3 |
CSX
| CSX Railroad | 11 |
DH
| Delaware & Hudson | 7 |
HS
| H and S Railroad Company | 1 |
IMRL
| I&M Rail Link | 1 |
KWT
| KWT Railway | 1 |
LV
| Lehigh Valley | 1 |
MCVX
| Massuchusetts Call/Volunteer Firefighters Assoc. | 1 |
MKT
| Missouri-Kansas-Texas | 5 |
NP
| Northern Pacific | 1 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 2 |
NYC
| New York Central | 1 |
PC
| Penn Central | 1 |
PDRR
| Pee Dee River RR | 1 |
RBOX
| Railbox Company | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SNC
| Saratoga & North Creek Railway | 1 |
SOO
| Soo Line | 1 |
SOU
| Southern | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 4 |
TSRD
| Twin State Railroad Company | 1 |
WC
| Wisconsin Central | 1 |
WIIX
| Williamette Industries Incorporated | 1 |
WP
| Western Pacific | 1 |
WSOR
| Wisconsin & Southern | 2 |