ATSF = Atchison, Topeka & Santa Fe Railway. (US Railroad)

BN = Burlington & Northern. (US Railroad)

BNSF = Burlington, Northern & Santa Fe. (US Railroad)

B&O = Baltimore & Ohio. (US Railroad)

BR = British Railways. (British Natonal Railway)

CB&Q = Chicago, Burlington and Quincy Railroad. (US Railroad)

CIL = Chicago, Indianapolis, and Louisville Railway. (US Railroad)

CN = Canadian National Railway. (Canadian Railroad)

CNW = Chicago & North Western Transport Company. (US Railroad)

CP = Canadian Pacific Railway. (Canadian Railroad)

CSXT = CSX Transportation. (US Railroad)

DB = Deutsche Bahn. (German National Railway)

DLMX = Daylight Locomotives and Machine Works Incorporated

EJ&E = Elgin, Joliet and Eastern Railway. (US Railroad)

H&H = Delaware and Hudson Railway. (US Railroad)

D&RGW = Denver & Rio Grande Western. (US Railroad)

GN = Great Northern. (US Railroad)

GTR = Grand Trunk Railroad. (US Railroad)

GWR = Great Western Railway. (British Railway)

KCS  = Kansas City Southern Railway. (US Railroad)

LMS = London, Midland, Scottish. (British Railway)

LNER = London & North Eastern Railway. (British Railway)

MON = Monon Railroad (US Railroad)

MP = Missouri Pacific Railroad. (US Railroad)

NP = Northern Pacific. (US Railroad)

NS = Norfolk Southern Railway. (US Railroad)

N&W = Norfolk and Western Railroad. (US Railroad)

NYC = New York Central Railroad. (US Railroad)

SP = Southern Pacific. (US Railroad)

SP&S = Spokane, Portland and Seattle Railway. (US Railroad)

PNW = Prescott & Northwestern. (US Railroad)

PRR = Pennsylvania Railroad. (US Railroad)

RGS = Rio Grand Southern. (US Railroad)

UP = Union Pacific. (US Railroad)

USRA = United States Railroad Administration (US Railroad)

VIA = Via Rail. (Canadian Railroad)

WP = Western Pacific. (US Railroad)