General Comprehensive Operating System (GCOS, /ˈdʒiːkoʊs/) is a family of operating systems oriented toward mainframe computers.
The original version of GCOS was developed by General Electric from 1962; originally called GECOS (the General Electric Comprehensive Operating Supervisor). The operating system is still used today in its most recent version (GCOS 8) on servers and mainframes produced by Honeywell and Groupe Bull, primarily through emulation, to provide continuity with legacy mainframe environments.
Read more about General Comprehensive Operating System: System Architecture and Concepts, Distributed Systems Architecture, History, GCOS8 Storage Units
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