AARX
| Association of American Railroads | 1 |
ANCX
| Norit Americas Incorporated | 1 |
ATSF
| Atchison Topeka & Santa Fe | 13 |
BN
| Burlington Northern | 6 |
BO
| Baltimore & Ohio | 4 |
CAGY
| Columbus & Greenville Railway | 1 |
CBQ
| Chicago Burlington & Quincy | 11 |
CG
| Central Of Georgia | 11 |
CIM
| Chicago And Illinois Midland | 1 |
CN
| Canadian National Railways | 5 |
CNW
| Chicago & Northwestern | 7 |
CO
| Chesapeake & Ohio | 2 |
CP
| Canadian Pacific Railway | 2 |
CPMY
| Coopersville & Marne Railway | 1 |
CR
| Conrail | 1 |
CRIP
| Chicago Rock Island & Pacific | 5 |
CS
| Colorado & Southern | 3 |
CSX
| CSX Railroad | 1 |
CTS
| Cumbres & Toltec Scenic | 1 |
CVL
| CUYHOGA VALLEY LINE RAILROAD | 1 |
DGVR
| DURBIN & GREENBRIER VALLEY RAILROAD INC | 1 |
DH
| Delaware & Hudson | 3 |
DLMX
| Daylight Locomotives and Machine Works Incorporated | 1 |
DLRR
| DLRR | 1 |
DLW
| Delaware Lackawanna & Western | 1 |
DRGW
| Denver & Rio Grande Western | 6 |
FEC
| Florida East Coast | 1 |
FEVR
| Fremont & Elkhorn Valley Railroad | 1 |
FNM
| Ferrocarriles Nacionales de Mexico | 1 |
GETY
| Gettysburg Railroad | 1 |
GMO
| Gulf Mobile & Ohio | 1 |
GN
| Great Northern | 10 |
GTW
| Grand Trunk Western | 3 |
HIC
| HIC | 1 |
HJS
| HJS | 2 |
HODX
| Heart of Dixie Railway Museum | 3 |
IC
| Illinois Central | 9 |
IHE
| IHE | 1 |
KCS
| Kansas City Southern | 3 |
KKRR
| Knox and Kane Railroad Company | 1 |
LI
| Long Island Rail Road Company | 1 |
LN
| Louisville & Nashville | 7 |
LSRX
| Lake Superior Railroad Museum | 1 |
MARC
| Maryland Transit Administration | 1 |
MC
| Mass Coastal | 1 |
MEC
| Maine Central | 1 |
MILW
| Milwaukee Road | 8 |
MNTX
| Minnesota Transportation Museum, Inc. | 1 |
MON
| Monon Route | 1 |
MP
| Missouri Pacific | 1 |
NAR
| Northern Alberta Railways | 1 |
NDEM
| NDEM | 2 |
NH
| New Haven | 3 |
NJT
| New Jersey Transit | 1 |
NKP
| Nickel Plate | 3 |
NN
| Northern Nevada Railroad Corporation | 1 |
NP
| Northern Pacific | 3 |
NRHX
| National Railway Historical Society | 1 |
NS
| Norfolk Southern | 1 |
NVRR
| NAPA Valley Railroad Company | 1 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 3 |
OCEM
| OCEM | 1 |
OCTL
| Oil Creek and Titusville Lines | 1 |
PC
| Penn Central | 3 |
PRR
| Pennsylvania Railroad | 19 |
PSTR
| PSTR | 1 |
RBBX
| Ringling Bros. and Barnum and Bailey | 2 |
REX
| Railway Express Agency, Inc. | 2 |
RFFS
| RFFS | 1 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
SAL
| Seaboard Air Line | 1 |
SBD
| Seaboard System | 1 |
SBRX
| SBRX | 1 |
SCL
| Seaboard Coast Line | 2 |
SHRR
| SHRR | 1 |
SHRX
| Smoky Hill Railway & Historical Society | 1 |
SLSF
| Saint Louis-San Francisco | 2 |
SOO
| Soo Line | 1 |
SOU
| Southern | 13 |
SP
| Southern Pacific | 10 |
SPMW
| Southern Pacific Maintenance of Way | 1 |
SPS
| Spokane Portland & Seattle | 5 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TC
| Temple & Central Texas | 1 |
TCRX
| Tennessee Central Railway Musem | 2 |
TEM
| Temiskaming & Northern Ontario | 1 |
TP
| Texas & Pacific | 1 |
UP
| Union Pacific Railroad Company | 11 |
UPP
| Union Pacific Passenger | 2 |
WAB
| Wabash | 2 |
WCRL
| West Chester Railroad Company | 1 |
WFCE
| WFCE | 1 |
WM
| Western Maryland | 1 |
WPRR
| Willamette and Pacific | 1 |
WT
| Wrightsville & Tennille | 1 |
YV
| YV | 1 |