ARR
| Alaska Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BNSF
| BNSF Railway | 1 |
BO
| Baltimore & Ohio | 3 |
BRW
| Black River And Western | 1 |
CNJ
| Central Rail Road of New Jersey | 4 |
CNW
| Chicago & Northwestern | 1 |
CR
| Conrail | 14 |
CSS
| Chicago South Shore And South Bend | 1 |
DH
| Delaware & Hudson | 1 |
DLW
| Delaware Lackawanna & Western | 2 |
EL
| Erie Lackawanna | 2 |
ERIE
| Erie Railroad | 1 |
HVRX
| Heber Valley Historic Railroad | 1 |
LNE
| Lehigh and New England Ry | 4 |
MEC
| Maine Central | 1 |
NCRR
| NCRR | 1 |
NS
| Norfolk Southern | 2 |
NSHR
| North Shore | 1 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 2 |
NYSW
| New York Susquehanna & Western | 3 |
PC
| Penn Central | 2 |
PRR
| Pennsylvania Railroad | 11 |
RBMN
| Reading Blue Mountain & Northern | 3 |
RDG
| Reading Railroad | 7 |
SIRT
| Staten Island Rapid Transit | 1 |
SLRS
| SMS Rail Service Incorporated | 1 |
SPAX
| Southeastern Pennsylvania Transportation (SEPTA) | 1 |
SRC
| Strasburg Railroad | 1 |
SRNJ
| Southern Railroad Company of New Jersey | 2 |
WAB
| Wabash | 1 |
WCRL
| West Chester Railroad Company | 1 |
WW
| Winchester & Western | 1 |
WWRC
| Wilmington and Western Railroad | 1 |