A
AB - Alberta (Canadian province)
AC - Algoma Central
ALCO - American Locomotive Company
ALCO-B - American Locomotive Company, Brooks Works; Dunkirk, NY
ALCO-C - American Locomotive Company, Cooke Works; Dunkirk, NY
ALCO-P - American Locomotive Company, Pittsburgh Works; Allegheny, PA
ALCO-R - American Locomotive Company, Rogers Works; Patterson, NJ
ALCO-S - American Locomotive Company, Schenectady Works; Schenectady, NY
AMF - Atelier Montreal Facilities Technotransport; Montreal, QC
ANY - Athasbasca Northern Railway
B
BC - British Columbia (Canadian province)
BLC - Boise Locomotive Company
BLW - Baldwin Locomotive Works; Eddystone, PA
Brooks - Brooks Locomotive Works; Dunkirk, NY
BNSF - Burlington Northern Santa Fe Railway
BUGX - Bruggere & Monson
B&LE - Bessemer & Lake Erie
B-W - Baldwin-Westinghouse
C
C&GT - Chicago & Grand Trunk Railroad; Fort Gratiot, MI
CA - California (American state)
CAC - Canadian Allis-Chalmers; Toronto, ON
CC&P - Chicago, Central & Pacific
CF - Canada Foundry Company; Toronto, ON
CFMG - Chemin de Fer de Matapedia et du Golfe
CGE - Canadian General Electric
CGR - Canadian Government Railway
CLC - Canadian Locomotive Company; Kingston, ON
CN - Canadian National
CNR - Canadian National Railways
CNR-M - Canadian National Railways, Moncton Shops; Moncton, NB
CNR-P - Canadian National Railways, Pointe St.Charles Shops; Montreal, QC
CNR-T - Canadian National Railways, Transcona Shops; Winnipeg, MB
CNoR - Canadian Northern Railway
CNW - Chicago North Western
Cooke - Cooke Locomotive and Machine Works; Paterson, NJ
CP - Canadian Pacific
CPR-D - Canadian Pacific Railway; De Lorimer Shops, Montreal, QC
CRI&P - Chicago, Rock Island & Pacific
CV - Central Vermont
CV-S - Central Vermont, St.Albans Shops; St.Albans, VT
D
D&H-G - Delaware & Hudson, Green Island Shops; Green Island, NY
D&TSL - Detroit & Toledo Shore Line
Danforth - Danforth Locomotive and Machine Company; Paterson, NJ
Davenport - Davenport Locomotive Works; Davenport, IA
Dickson - Dickson Manufacturing Company; Scranton, PA
DM&IR - Duluth, Missabe & Iron Range
DT&I - Detroit, Toledo & Ironton
DW&P - Duluth, Winnipeg & Pacific
Dübs - Dübs & Company; Glasgow, Scotland, UK
E
EE - English Electric
EMC - Electro Motive Corporation
EMCC - Electro Motive Corporation Canada; London, ON
EMD - Electro Motive Division; La Grange, IL
EJ&E - Elgin, Joliet & Eastern
ESL - East St.Louis Locomotive Works; East St.Louis, IL
F
Fleming - Fleming & Humbert Foundry; St.John, NB
G
GE - General Electric; Erie, PA or Fort Worth, TX
GMD - General Motors Diesel; London, ON
GO - GO Transit
Grant - Grant Locomotive Works; Paterson, NJ
GRYR - Grenada Railway
GT - Grand Trunk (New England)
GTP - Grand Trunk Pacific
GTR - Grand Trunk Railway
GTR-B - Grand Trunk Railway, Battle Creek Shops; Battle Creek, MI
GTR-P - Grand Trunk Railway, Pointe St.Charles Shops; Montreal, QC
GTW - Grand Trunk Western
H
Hinkley - Hinkley Locomotive Company; Boston, MA
I
IA - Iowa (American state)
IC - Illinois Central
ICR - Intercolonial Railway
ICR-M - Intercolonial Railway, Moncton Shops; Moncton, NB
L
Lima - Lima Locomotive Works; Lima, OH
LIRR - Long Island Rail Road
M
MA - Massachusetts (American state)
MaK - Maschinenbau Kiel GmbH
MB - Manitoba (Canadian province)
MI - Michigan (American state)
Manchester - Manchester Locomotive Company; Manchester, NH
ME - Maine (American state)
MLW - Montreal Locomotive Works; Montreal, QC
N
NAR - Northern Alberta Railway
NB - New Brunswick (Canadian province)
NBL - North British Locomotive; Glasgow, UK
NBEC - New Brunswick East Coast
NL - Newfoundland (Canadian province)
NH - New Hampshire (American state)
NJ - New Jersey (American state)
NS - Nova Scotia (Canadian province)
NY - New York (American state)
O
OCR - Ottawa Central Railway
OCC - Ottawa Car Company
OH - Ohio (American state)
ON - Ontario (Canadian province)
OR - Oshawa Railway
P
PA - Pennsylvania (American state)
PC - Penn Central
Pittsburgh - Pittsburgh Locomotive and Car Works; Allegheny, PA
Portland - Portland Company; Portland, ME
PR - Progress Rail
PRR-A - Pennsylvania Railroad, Altoona Shops; Altoona, PA
P&LE - Pittsburgh & Lake Erie
Q
QC - Quebec (Canadian province)
QRC - Quebec Railway Corporation
QR&LP - Quebec Railway, Light & Power
R
Rathbun - Rathbun Company; Deseronto, ON
Rhode Island - Rhode Island Locomotive Works; Provedence, RI
RI - Rhode Island (American state)
Richmond - Richmond Locomotive Works; Richmond, VA
RNC - Reid Newfoundland Company; St.John's, NL
Rogers - Rogers Locomotive & Machine Works; Patterson, NJ
S
SAR - Savage Alberta Railway
Schenectedy - Schenectedy Locomotive Works; Schenectedy, NY
SCFG - Societe de Chemins de Fer de Gaspesie
SK - Saskatchewan (Canadian province)
SSW - St.Louis Southwestern Railway (1891-1992)
SP - Southern Pacific Railroad (1865-1996)
T
TRRY - Trillium Railway
TT - Terra Transport (1979-1988)
U
UK - United Kingdom
Union - Union Iron Works; San Francisco, CA
UP - Union Pacific
V
VA - Virginia (American state)
VIA - VIA Rail Canada (1978-present)
VIA-CN - VIA Rail-Canadian National (1976-1978)
VMV - VMV Enterprises
VT - Vermont (American state)
W
WC - Wisconsin Central
WI - Wisconsin (American state)