AA
| Ann Arbor | 1 |
AEFR
| Aurora Elgin and Fox River Electric | 1 |
AERC
| Albany and Eastern Railroad Company | 2 |
AMTK
| Amtrak | 6 |
ATTX
| TTX Company - Container Flats | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 3 |
BO
| Baltimore & Ohio | 2 |
BVRR
| BVRR | 3 |
BYCX
| Chelatchie Prairie Railroad | 1 |
CI
| Cambria and Indiana Railroad Company | 1 |
CIL
| Chicago Indianapolis & Louisville (Monon | 4 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
CO
| Chesapeake & Ohio | 2 |
CP
| Canadian Pacific Railway | 4 |
CR
| Conrail | 3 |
CRIP
| Chicago Rock Island & Pacific | 2 |
CSS
| Chicago South Shore And South Bend | 1 |
CTA
| Chicago Transit Authority | 1 |
CWI
| Chicago and Western Indiana | 2 |
DIR
| DIR | 1 |
DLA
| DLA | 1 |
DMIR
| Duluth Missabe & Iron Range | 1 |
DMN
| Duluth Missabe and Northern Railway | 1 |
DODX
| Department Of Defense | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
DSSA
| Duluth, South Shore & Atlantic | 1 |
EBT
| East Broad Top | 4 |
GMO
| Gulf Mobile & Ohio | 4 |
GSMR
| Great Smoky Mountains | 1 |
GTW
| Grand Trunk Western | 5 |
HVRM
| HVRM | 4 |
HVSR
| Hocking Valley Scenic | 1 |
IN
| Indiana Northeastern | 8 |
IRYM
| Illinois Railway Museum | 3 |
JTTX
| TTX Company | 3 |
KRL
| Kasgro Rail Lines | 5 |
LN
| Louisville & Nashville | 2 |
METW
| Municipality of East Troy Wisc. | 1 |
METX
| METRA | 1 |
MHBC
| MHBC | 1 |
MKT
| Missouri-Kansas-Texas | 2 |
MON
| Monon Route | 3 |
MP
| Missouri Pacific | 1 |
MSO
| Michigan Southern | 1 |
NKP
| Nickel Plate | 7 |
NP
| Northern Pacific | 1 |
NW
| Norfolk & Western | 2 |
OCSR
| OCSR | 1 |
PC
| Penn Central | 1 |
POTB
| Port of Tillamook Bay | 4 |
PRR
| Pennsylvania Railroad | 2 |
RDG
| Reading Railroad | 3 |
SFS
| Santa Fe Southern | 1 |
SIIX
| Siemens Industry Inc | 1 |
SMRS
| Springfield (MO) Railway Services | 4 |
SNCF
| French National Railways | 4 |
SNHX
| IND/AG Chemicals Incorporated | 1 |
SOU
| Southern | 6 |
SP
| Southern Pacific | 1 |
TMER
| TMER | 1 |
TTOX
| TTX Company | 1 |
TTWX
| TTX Company | 1 |
TTX
| TTX Company | 3 |
TTXX
| TTX Company | 1 |
UP
| Union Pacific Railroad Company | 4 |
USAX
| United States Army | 5 |
VASR
| VASR | 2 |
VOSC
| VOSC | 3 |
WAB
| Wabash | 5 |
WC
| Wisconsin Central | 1 |
WGRR
| WGRR | 1 |
WM
| Western Maryland | 5 |
WPYR
| White Pass & Yukon Route | 3 |
YVT
| Yakim Valley Transportation Company | 2 |