High Quality Content by WIKIPEDIA articles! The IBM 9020 refers to IBM System/360-family computers adapted into a multiprocessor system for use by the U.S. FAA for en route Air Traffic Control in its 20 Air Route Traffic Control Centers beginning in the late 1960s. The IBM 9020A, for example, was based on the System 360/50 and the 9020D used 2 out of 3 360/65 processors for flight and radar data processing with 2 out of 3 360/50 processors providing input/output capability.