ABC
| Atlanta Birmingham & Coast | 1 |
ACL
| Atlantic Coast Line | 12 |
ACY
| Akron, Canton & Youngstown | 1 |
ATSF
| Atchison Topeka & Santa Fe | 9 |
BAP
| Butte Anaconda & Pacific | 1 |
BN
| Burlington Northern | 2 |
BO
| Baltimore & Ohio | 6 |
CAE
| Chicago Aurora & Elgin | 1 |
CBQ
| Chicago Burlington & Quincy | 15 |
CIM
| Chicago And Illinois Midland | 1 |
CNW
| Chicago & Northwestern | 5 |
CO
| Chesapeake & Ohio | 4 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 1 |
CRIP
| Chicago Rock Island & Pacific | 8 |
CS
| Colorado & Southern | 3 |
CV
| Central Vermont | 1 |
DLW
| Delaware Lackawanna & Western | 1 |
DMIR
| Duluth Missabe & Iron Range | 1 |
DOTX
| USDOT/Federal Railroad Administration | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
DTI
| Detroit Toledo & Ironton | 1 |
EL
| Erie Lackawanna | 3 |
ERIE
| Erie Railroad | 1 |
FEC
| Florida East Coast | 3 |
GN
| Great Northern | 6 |
IC
| Illinois Central | 3 |
KCS
| Kansas City Southern | 1 |
LI
| Long Island Rail Road Company | 1 |
LN
| Louisville & Nashville | 5 |
MILW
| Milwaukee Road | 15 |
MKT
| Missouri-Kansas-Texas | 2 |
MP
| Missouri Pacific | 2 |
NCSL
| Nashville Chattanooga & St Louis | 1 |
NH
| New Haven | 1 |
NKP
| Nickel Plate | 2 |
NP
| Northern Pacific | 5 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 4 |
NYC
| New York Central | 5 |
PC
| Penn Central | 1 |
PRR
| Pennsylvania Railroad | 5 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
SAL
| Seaboard Air Line | 9 |
SCL
| Seaboard Coast Line | 11 |
SOO
| Soo Line | 1 |
SOU
| Southern | 3 |
SP
| Southern Pacific | 8 |
TENN
| Tennessee Railway Company | 1 |
TOC
| Toledo & Ohio Central | 1 |
TP
| Texas & Pacific | 1 |
TSSX
| U.S. Dept. of Energy Albuquerque Operations Office | 4 |
UP
| Union Pacific Railroad Company | 14 |
UPP
| Union Pacific Passenger | 1 |
WAB
| Wabash | 2 |
WLE
| WLE | 1 |
WM
| Western Maryland | 1 |