AAR: Association of American Railroads
ACF: American Car and Foundry
ACI: Allied Continental Intermodal
ACTO: Association of Charter Train Operators
AHB: Automatic Half Barriers
ALARP: As Low As Reasonably Practical
ANY: Athabasca Northern Railway
APT: Advanced Passenger Train
APTIS: All Purpose Ticket Issuing System
ARES: Advanced Railroad Electronic System
ARISE: Automatic Railway Information Systems for Europe
ARN: Alberta RailNet
ARND: Chemin de fer Arnaud
ATB: Automatic Ticket Barrier
ATC: Angel Train Contacts
ATOC: Association of Train Operating Companies
ATP: Automatic Train Protection
ATT: Advanced Tilting Train
AWS: Automatic Warning System
BCRY: Barrie-Collingwood Railway
BNS: Birmingham New Street
BRB: British Railways Board
BRBS: British Rail Business Systems
BRT: British Rail Telecommunications
BRUTE: British Railways Universal Trolley Equipment
BTP: British Transport Police
CBC: Chemin de fer Baie des Chaleurs
CBNS: Cape Breton and Central Nova Scotia Railway
CCFG: Chemin de fer Gaspésie
CDR: Cheap Day Return
CEMR: Central Manitoba Railway
CFC: Chemin de fer Charlevoix
CFL: Chemin de fer Lanaudière
CFMG: Chemin de fer de la Matapédia et du Golfe
CFQC: Quebec Central railway
CFQG: Quebec Gatineau railway
CFRR: Romaine River railway
CIP: Core Investment Program
COBA: Cost Benefit Analysis
CPR: Canadian Pacific Railway