General Comprehensive Operating System

General Comprehensive Operating System (GCOS, /ˈks/; originally GECOS, General Electric Comprehensive Operating Supervisor) is a family of operating systems oriented toward the 36-bit GE-600 series and Honeywell 6000 series mainframe computers.

General Comprehensive Operating System (GECOS)
DeveloperGeneral Electric, Honeywell, Groupe Bull, Atos
Working stateCurrent
Initial release1962 (1962)
Latest releaseGCOS 8
PlatformsGE-600 series, Honeywell 6000 series
Licenseproprietary
Official websiteatos.net/en/products/enterprise-servers/bullsequana-m

The original version of GCOS was developed by General Electric beginning in 1962. The operating system is still used today in its most recent versions (GCOS 7 and GCOS 8) on servers and mainframes produced by Groupe Bull, primarily through emulation, to provide continuity with legacy mainframe environments. GCOS 7 and GCOS 8 are separate branches of the operating system and continue to be developed alongside each other.

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