The IBM 9020 refers to IBMSystem/360-family computers adapted for use by the U.S. FAA for enroute Air Traffic Control in its 20 Air Route Traffic Control Centers beginning in the late 1960s. The IBM 9020E, for example, was based on the System 360/65.
The 9020s were in service until 1989 when they were finally replaced by IBM 3083 BX1 mainframes as part of the FAA's HOST upgrade. The 3083s in turn were replaced with IBM 9672 RA4 parallel processing servers during the FAA's Host and Oceanic Computer System Replacement (HOCSR) completed in 1999. At least during the first phase of the upgrade, the 9672's were running the FAA's original assembly language code in System/360 emulation mode.
Being somewhat uncertain of the reliability and availability of the then new monolithic integrated circuits, IBM chose instead to design custom hybrid integrated circuits using discrete flip chip mounted glass encapsulated transistors and diodes with silk screened resistors on a ceramic substrate, then either encapsulated in plastic or covered with a metal lid.
The IBM 1130 was a low cost computer system based on the System/360 SLT approach, which was sometimes used as a remote job entry system for the System/360.
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