Bendix sold its computer division to Control Data Corporation in 1963, effectively terminating the G-20.
[1] The G-20 system was a general-purpose mainframe computer, constructed of transistorized modules and magnetic-core memory.
Single- and double-precision floating-point arithmetic were allowed, as well as a custom scaled format, called Pick-a-Point.
[3] A special configuration of the G-20, a dual-processor G-21, was used to support campus computing at Carnegie Institute of Technology in the 1960s.
A true dual-processor operating system was developed late in the life of the G-21, but never reached production status.
The 1-inch magnetic tapes were block addressable, allowing AND to manage a directory file system interchangeably on any available magnetic storage (tape, disk, or RACE cards).
MONITOR was the supervisory program, and the special set of routines was called THEM THINGS.