ASP
| ASP | 1 |
ATS
| ATS | 14 |
BR
| Buffalo and Pittsburgh | 1 |
CATP
| CATP | 1 |
CBH
| CBH | 1 |
DRGW
| Denver & Rio Grande Western | 6 |
DTL
| DTL | 2 |
FCM
| Ferrocarriles Nacionales de Mexico | 1 |
FS
| FS | 1 |
ITW
| ITW | 4 |
KOMA
| KOMA | 1 |
MP
| Missouri Pacific | 1 |
MPX
| COLUMBIAN CARBON CO., MAGNETIC PIGMENT DIV. | 1 |
PB
| PB | 1 |
PPC
| PPC | 1 |
PSS
| PSS | 1 |
RLL
| RLL | 1 |
RLP
| RLP | 1 |
RLPI
| RLPI | 1 |
RPL
| RPL | 1 |
RTI
| Rail Tours | 1 |
SDAG
| SDAG | 3 |
SDAQ
| SDAQ | 1 |
SDSG
| SDSG | 1 |
SPD
| SPD | 1 |
SPMW
| Southern Pacific Maintenance of Way | 3 |
SWIN
| SWIN | 1 |
TBSR
| TBSR | 2 |
THC
| THC | 8 |
THCM
| THCM | 1 |
TIE
| TIE | 2 |
TM
| Texas-Mexican | 2 |
TMT
| Trailer Marine Transport Corporation | 1 |
TPIT
| TPIT | 1 |
TRIO
| TRIO | 1 |
TRIP
| TRIP | 6 |
UP
| Union Pacific Railroad Company | 39 |
UPX
| UPX | 2 |
WT
| Wrightsville & Tennille | 1 |