AMTK
| Amtrak | 2 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BDRV
| Belvidere & Delaware Railroad | 9 |
BO
| Baltimore & Ohio | 12 |
BRC
| Belt Railway of Chicago | 1 |
BRW
| Black River And Western | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CNJ
| Central Rail Road of New Jersey | 6 |
CO
| Chesapeake & Ohio | 1 |
CR
| Conrail | 12 |
CSOR
| Connecticut Southern | 1 |
CSX
| CSX Railroad | 12 |
DH
| Delaware & Hudson | 2 |
DL
| Delaware-Lackawanna Railroad Company | 3 |
DLW
| Delaware Lackawanna & Western | 4 |
DMHX
| Davenport Mammoet LLC | 1 |
DRGW
| Denver & Rio Grande Western | 3 |
EBT
| East Broad Top | 8 |
EJE
| Elgin Joliet and Eastern | 3 |
ERIE
| Erie Railroad | 12 |
HRRC
| Housatonic Railroad Company | 1 |
IAIS
| Iowa Interstate | 1 |
IC
| Illinois Central | 2 |
ICG
| Illinois Central Gulf | 2 |
LCM
| Lake Champlain & Moriah | 1 |
LI
| Long Island Rail Road Company | 2 |
LNE
| Lehigh and New England Ry | 2 |
LV
| Lehigh Valley | 3 |
MCVX
| Massuchusetts Call/Volunteer Firefighters Assoc. | 5 |
ME
| Morristown & Erie Railroad | 4 |
MEC
| Maine Central | 3 |
MGA
| Monongahela RR | 1 |
MILW
| Milwaukee Road | 3 |
MSHC
| MSHC | 2 |
NHB
| National Harbours Board | 1 |
NJTR
| NJ Transit Rail Operations | 1 |
NSRM
| NSRM | 2 |
NYC
| New York Central | 14 |
NYSW
| New York Susquehanna & Western | 4 |
PC
| Penn Central | 1 |
PLE
| Pittsburgh & Lake Erie | 2 |
POHC
| Pittsburgh & Ohio Central | 1 |
PRR
| Pennsylvania Railroad | 12 |
RR
| Raritan River | 1 |
SBD
| Seaboard System | 2 |
SCL
| Seaboard Coast Line | 1 |
SIRT
| Staten Island Rapid Transit | 9 |
SLRS
| SMS Rail Service Incorporated | 1 |
SLSF
| Saint Louis-San Francisco | 3 |
SRC
| Strasburg Railroad | 1 |
TVRM
| Tennessee Valley | 2 |
UP
| Union Pacific Railroad Company | 1 |
URR
| Union Railroad | 5 |
WAB
| Wabash | 2 |