ALLN
| Allentown and Auburn Railroad | 5 |
BCOL
| Canadian National Railways | 2 |
BKTY
| Union Pacific Railroad Company | 1 |
BM
| Boston & Maine | 6 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 2 |
BPRR
| Buffalo and Pittsburgh | 4 |
CNA
| Canadian National Railways | 3 |
COER
| Crab Orchard & Egyptian | 1 |
CP
| Canadian Pacific Railway | 1 |
CPAA
| Canadian Pacific Railway | 1 |
CR
| Conrail | 2 |
CSX
| CSX Railroad | 4 |
DL
| Delaware-Lackawanna Railroad Company | 1 |
DWC
| Canadian National Railways | 1 |
EEC
| East Erie Commercial Railroad | 5 |
EL
| Erie Lackawanna | 1 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
FEC
| Florida East Coast | 2 |
FRR
| Falls Road Railroad Company Incorporated | 1 |
FXE
| Ferromex | 1 |
GMRC
| Green Mountain RR | 1 |
GN
| Great Northern | 3 |
GNWR
| Genesee and Wyoming Railroad Company | 9 |
GTW
| Grand Trunk Western | 3 |
HS
| H and S Railroad Company | 1 |
JSSX
| Jersey Shore Steel Company | 8 |
KCS
| Kansas City Southern | 1 |
LBR
| Lowville and Beaver River Railroad Compa | 4 |
LSRC
| Lake State Railway Company | 1 |
LV
| Lehigh Valley | 3 |
LVRR
| Lycoming Valley | 5 |
MEC
| Maine Central | 1 |
MILW
| Milwaukee Road | 1 |
MISX
| Milwaukee Solvents and Chemicals Corporation | 2 |
MP
| Missouri Pacific | 1 |
MPA
| Maryland and Pennsylvania Railroad | 2 |
MTR
| Montour RR | 1 |
NP
| Northern Pacific | 2 |
NS
| Norfolk Southern | 10 |
NSHR
| North Shore | 3 |
NW
| Norfolk & Western | 3 |
NYC
| New York Central | 5 |
PRR
| Pennsylvania Railroad | 1 |
RBMN
| Reading Blue Mountain & Northern | 15 |
RBOX
| Railbox Company | 1 |
SKRX
| Schuylkill Railcar L.P. | 2 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 2 |
SPS
| Spokane Portland & Seattle | 1 |
SRY
| Southern Railway of British Columbia Lim | 1 |
SV
| Shenandoah Valley Railroad | 3 |
TBOX
| TTX Company | 4 |
TFM
| Kansas City Southern De Mexico | 1 |
UP
| Union Pacific Railroad Company | 1 |
WC
| Wisconsin Central | 1 |
WM
| Western Maryland | 1 |
WTRM
| Warren and Trumbull Railroad Company | 1 |