A Pengelly & CoEdwardstownAB Arlövs Mekaniska Verkstad och WaggonfabrikSwedenABBSweden
ABBSwitzerland
AdamovaCzech RepublicAddington Railway WorkshopsNew Zealand
AdtranzGermany
AEGGermanyAG Vulcan StettinGerman Empire
AITOPeople's Republic of China
Alexander DennisUnited KingdomAlexandrovsky Machine Building PlantRussia
Alfa RomeoItaly
Alna SharyoJapanAlsthomFrance
AlstomFrance
Alstom Sifang (Qingdao) Transportation Ltd.People's Republic of ChinaAlstom TransportFrance
ALSTOM Transportation GermanyFrance
Altoona WorksUnited StatesAmeco HamarNorwayAmerican Car CompanyUnited States
American Locomotive CompanyUnited States
American Motors CorporationUnited States
AnsaldoItaly
AnsaldoBredaItaly
Arnold Jung LokomotivfabrikGermany
ArrivalUnited Kingdom
ASEASweden
Ashford WorksUnited KingdomAssociated Electrical IndustriesUnited Kingdom
Aston MartinUnited KingdomAston MartinUnited KingdomAstra BusRomaniaAstra Vagoane CălătoriRomania
Ateliers de Constructions Electriques de CharleroiBelgium
Ateliers de Constructions Mécaniques de VeveySwitzerland
Ather EnergyIndiaATMItaly
AudiGermany
Automobile DaciaRomania
Autosan SAPolandAvtotorRussia
AZLKRussia