ADBF
| Adrian and Blissfield Rail Road Company | 2 |
ATSF
| Atchison Topeka & Santa Fe | 6 |
ATW
| Atlantic and Western | 1 |
BBCX
| ABB Power Generation Incorporated | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 3 |
BSCX
| Bethlehem Steel Corporation | 1 |
BTCX
| Browner Turnout Company | 46 |
CANX
| CANAC International | 3 |
CIGX
| THE CIT GROUP/CAPITAL FINANCE, INC. | 1 |
CO
| Chesapeake & Ohio | 1 |
CP
| Canadian Pacific Railway | 5 |
CR
| Conrail | 7 |
CSS
| Chicago South Shore And South Bend | 1 |
CSX
| CSX Railroad | 9 |
CTTX
| TTX Company - Autoracks | 1 |
CW
| Colorado and Wyoming | 1 |
DAKR
| Dakota Rail Incorporated | 2 |
DH
| Delaware & Hudson | 3 |
DODX
| Department Of Defense | 25 |
DRGW
| Denver & Rio Grande Western | 2 |
FEC
| Florida East Coast | 2 |
FTTX
| TTX Company | 17 |
FURX
| First Union Rail | 1 |
GEX
| General Electric Company | 1 |
HKRX
| HKRX | 2 |
HTTX
| TTX Company | 2 |
IC
| Illinois Central | 1 |
ICE
| Iowa Chicago and Eastern | 3 |
IHXX
| IHXX | 1 |
ITC
| Illinois Terminal Railroad | 3 |
ITTX
| TTX Company | 7 |
JTLX
| CIT Group/Capital Finance, Inc | 1 |
JTTX
| TTX Company | 2 |
KR;
| KR; | 1 |
KRL
| Kasgro Rail Lines | 7 |
LBFX
| L B Foster Co | 1 |
LBR
| Lowville and Beaver River Railroad Compa | 1 |
LMIC
| Lake Michigan & Indiana Railroad | 5 |
LNAL
| Louisville New Albany and Corydon Railroad | 2 |
LTTX
| TTX Company | 3 |
MTTX
| TTX Company | 7 |
NRPX
| Northrop Corporation | 1 |
NS
| Norfolk Southern | 4 |
NW
| Norfolk & Western | 4 |
OTTC
| OTTC | 1 |
OTTX
| TTX Company | 7 |
PC
| Penn Central | 4 |
PRR
| Pennsylvania Railroad | 5 |
PRSX
| Progress Rail Service | 1 |
PTDX
| ABB Power T and D Company Incorporated | 1 |
PTTX
| TTX Company | 15 |
QTTX
| TTX Company | 16 |
QUAX
| Redstreak, LLC | 2 |
RDG
| Reading Railroad | 2 |
REGX
| Regus Industries LLC | 1 |
RTTX
| TTX Company | 4 |
SOU
| Southern | 8 |
SP
| Southern Pacific | 6 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TDIX
| Transdynamic Leasing | 1 |
TPAX
| TPAX | 3 |
TTJX
| TTX Company-Bulkhead Flats | 2 |
TTOX
| TTX Company | 1 |
TTUX
| TTX Company | 1 |
TTWX
| TTX Company | 1 |
TTX
| TTX Company | 4 |
TZPR
| Tazewell & Peoria Railroad | 3 |
UP
| Union Pacific Railroad Company | 1 |
VTTX
| TTX Company | 1 |
WC
| Wisconsin Central | 3 |
WP
| Western Pacific | 1 |
XTTX
| TTX Company | 3 |