ACL
| Atlantic Coast Line | 16 |
ACWR
| Aberdeen, Carolina & Western | 7 |
AR
| Aberdeen and Rockfish | 17 |
BB
| Buckingham Branch | 6 |
BBCX
| ABB Power Generation Incorporated | 5 |
BK
| BK | 1 |
BO
| Baltimore & Ohio | 14 |
CBQ
| Chicago Burlington & Quincy | 1 |
CNJ
| Central Rail Road of New Jersey | 6 |
CO
| Chesapeake & Ohio | 9 |
CR
| Conrail | 5 |
CRIP
| Chicago Rock Island & Pacific | 9 |
CSX
| CSX Railroad | 1 |
DUPX
| Du Pont De Nemours and Company Incorporated | 1 |
EV
| Everett Railroad | 1 |
IC
| Illinois Central | 6 |
ICG
| Illinois Central Gulf | 3 |
LN
| Louisville & Nashville | 3 |
MCVX
| Massuchusetts Call/Volunteer Firefighters Assoc. | 1 |
MILW
| Milwaukee Road | 2 |
NS
| Norfolk Southern | 37 |
NW
| Norfolk & Western | 42 |
RFP
| Richmond Fredericksburg & Potomac | 2 |
SAL
| Seaboard Air Line | 15 |
SBD
| Seaboard System | 6 |
SCL
| Seaboard Coast Line | 4 |
SOO
| Soo Line | 4 |
SOU
| Southern | 13 |
SP
| Southern Pacific | 1 |
TC
| Temple & Central Texas | 1 |
TC1
| Tennessee Central | 1 |
TCRX
| Tennessee Central Railway Musem | 17 |
VGNX
| VGNX | 1 |
WM
| Western Maryland | 11 |
WSSB
| WSSB | 2 |