AMTK
| Amtrak | 2 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BNSF
| BNSF Railway | 1 |
CEFX
| CIT Group/Capital Finance, Inc | 1 |
CEI
| Chicago & Eastern Illinois | 2 |
CMHX
| CarMath Incorporated | 1 |
CNW
| Chicago & Northwestern | 1 |
CO
| Chesapeake & Ohio | 2 |
CR
| Conrail | 1 |
CRDX
| Chicago Freight Car Leasing Company | 1 |
CSX
| CSX Railroad | 6 |
DODX
| Department Of Defense | 1 |
DUPX
| Du Pont De Nemours and Company Incorporated | 3 |
DWC
| Canadian National Railways | 1 |
EBT
| East Broad Top | 2 |
FGLK
| Finger Lakes Railway | 1 |
GMRC
| Green Mountain RR | 1 |
GSMR
| Great Smoky Mountains | 1 |
IATR
| Iowa Traction Railroad Company | 1 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 1 |
IFRX
| Infinity Rail LLC | 1 |
MRS
| Manufacturers Railway | 4 |
NS
| Norfolk Southern | 4 |
NW
| Norfolk & Western | 2 |
NYC
| New York Central | 3 |
PALX
| Paducah & Louisville | 1 |
PBRX
| TYSON FRESH MEATS | 1 |
PRR
| Pennsylvania Railroad | 1 |
QOCX
| Quaker Oats Company | 1 |
REX
| Railway Express Agency, Inc. | 1 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 3 |
SCL
| Seaboard Coast Line | 1 |
SM
| St. Marys Railroad | 1 |
SOO
| Soo Line | 1 |
SOU
| Southern | 2 |
VGN
| Virginian Railway | 1 |
WAB
| Wabash | 2 |
WM
| Western Maryland | 1 |