Honeywell 6000 series

The Honeywell 6000 series is a family of mainframe computers that Honeywell manufactured from 1970 to 1989 after acquiring General Electric's computer division that year; the machines were an integrated circuit development of GE's earlier 600 series mainframes. They were 36 bit word machines with 18 bit addressing and a memory oriented design in which a system controller in each memory module arbitrated requests from processors and other components, and the fastest models, the Level 66 and 68 systems, reached about 1.2 million instructions per second. Most ran Honeywell's GCOS operating system, inherited from GE's GECOS, with some models supporting Multics or, after Honeywell's 1974 acquisition of Xerox Data Systems, CP-6; Honeywell sold the line to France's Groupe Bull in 1989, which continued building compatible machines, and an open source DPS8M emulator now lets the systems run on modern hardware.