ABPS
| ABPS | 1 |
AMTK
| Amtrak | 23 |
ATSF
| Atchison Topeka & Santa Fe | 16 |
BN
| Burlington Northern | 1 |
CBQ
| Chicago Burlington & Quincy | 13 |
CC
| Chicago Central & Pacific | 4 |
CCRR
| Claremont Concord | 13 |
CDTX
| California DOT | 42 |
CEI
| Chicago & Eastern Illinois | 1 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 2 |
CRIP
| Chicago Rock Island & Pacific | 8 |
CWR
| CWR Incorporated | 2 |
DRGW
| Denver & Rio Grande Western | 3 |
DSNG
| Durango & Silverton Narrow Gauge Railroa | 142 |
GANO
| Georgia Northern Railway Company | 4 |
GFRR
| Georgia and Florida Railnet | 6 |
HVRX
| Heber Valley Historic Railroad | 3 |
ITC
| Illinois Terminal Railroad | 1 |
JPBX
| Joint Powers Board (CalTrain) | 3 |
MILW
| Milwaukee Road | 1 |
MKT
| Missouri-Kansas-Texas | 3 |
MSV
| Mississippi and Skuna Valley Railroad Co | 5 |
NC
| CSX Transportation Incorporated | 2 |
NJT
| New Jersey Transit | 2 |
NN
| Northern Nevada Railroad Corporation | 3 |
NP
| Northern Pacific | 3 |
OCSR
| OCSR | 9 |
ORLC
| ORLC | 4 |
PE
| Peoria & Eastern | 3 |
PLA
| Pacific Locomotive Association [Niles Canyon Railway] | 42 |
PRR
| Pennsylvania Railroad | 3 |
PULL
| Pullman | 7 |
RBBX
| Ringling Bros. and Barnum and Bailey | 1 |
RCBT
| RCBT | 4 |
SCBG
| Santa Cruz Big Trees & Pacific | 8 |
SDAE
| San Diego & Arizona Eastern | 3 |
SLGW
| Salt Lake Garfield and Western Railway Company | 2 |
SN
| Sacramento Northern | 1 |
SP
| Southern Pacific | 131 |
SPS
| Spokane Portland & Seattle | 15 |
SRYC
| Sierra Railway Company of California | 10 |
SSCR
| SSCR | 1 |
SSRR
| Sacramento Southern | 12 |
STIB
| STIB | 2 |
SW
| Southwestern Railroad Company | 2 |
TG
| TG | 1 |
UP
| Union Pacific Railroad Company | 22 |
UPP
| Union Pacific Passenger | 30 |
USAX
| United States Army | 1 |
UT
| UT | 5 |
VT
| Virginia & Truckee | 47 |
WP
| Western Pacific | 19 |
YV
| YV | 1 |