PolandAntonio Carraro, ItalyARDCO, USAArgyle, ScotlandARIS, ItalyArmscor, South AfricaArmstrong-Saurer, United KingdomArmstrong-Siddeley, United KingdomArrival, United KingdomArrow, USAAshok Leyland, IndiaAsia, South KoreaAsiaWing, South AfricaAskam, TurkeyAssomption, FranceAstra, ItalyATC, USAAtkinson,...