APRX
| Air Products and Chemicals Incorporated | 2 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BDRV
| Belvidere & Delaware Railroad | 7 |
BO
| Baltimore & Ohio | 21 |
CNJ
| Central Rail Road of New Jersey | 7 |
CO
| Chesapeake & Ohio | 11 |
COPR
| COPR | 4 |
CR
| Conrail | 42 |
CSX
| CSX Railroad | 1 |
DLW
| Delaware Lackawanna & Western | 9 |
DRGW
| Denver & Rio Grande Western | 1 |
DUPX
| Du Pont De Nemours and Company Incorporated | 1 |
ERIE
| Erie Railroad | 3 |
EV
| Everett Railroad | 2 |
FGLK
| Finger Lakes Railway | 2 |
HBTM
| HBTM | 1 |
LHR
| Lehigh & Hudson River | 2 |
LV
| Lehigh Valley | 11 |
MB
| Meridian & Bigbee | 1 |
MEC
| Maine Central | 1 |
MGA
| Monongahela RR | 1 |
MHWA
| Mohawk Adirondack and Northern Railroad | 1 |
MKT
| Missouri-Kansas-Texas | 4 |
MP
| Missouri Pacific | 2 |
NKP
| Nickel Plate | 10 |
NS
| Norfolk Southern | 11 |
NW
| Norfolk & Western | 23 |
NYC
| New York Central | 4 |
NYLE
| New York and Lake Erie Railroad Company | 3 |
PC
| Penn Central | 2 |
PLE
| Pittsburgh & Lake Erie | 2 |
PRR
| Pennsylvania Railroad | 34 |
RDG
| Reading Railroad | 16 |
RR
| Raritan River | 5 |
SBD
| Seaboard System | 3 |
SCL
| Seaboard Coast Line | 8 |
SIRT
| Staten Island Rapid Transit | 23 |
SLRS
| SMS Rail Service Incorporated | 1 |
SRC
| Strasburg Railroad | 1 |
VC
| Virginia Central Railway | 3 |
VGN
| Virginian Railway | 1 |
WAB
| Wabash | 2 |
WCRL
| West Chester Railroad Company | 9 |
WM
| Western Maryland | 26 |
WWRC
| Wilmington and Western Railroad | 20 |