Advanced Comprehensive Operating System
Advanced Comprehensive Operating System is a family of mainframe computer operating systems developed by NEC for the Japanese market. It consists of three systems, based on the General Comprehensive Operating System family developed by General Electric, Honeywell, and Bull. Two of these systems, ACOS-2 (based on GCOS 4) and ACOS-4 (based on GCOS 7) are still sold, although only ACOS-4 is under active development. ACOS-6 (based on GCOS 8) is an obsolete high-end mainframe platform, which ceased active development in the early 2000s.
In late September 2012, NEC announced a return from IA64 to the previous NOAH line of proprietary mainframe processors for ACOS-4, now produced in a quad-core variant on 40 nm, called NOAH-6.[1]
References
External links
- A history of GE/Honeywell/NEC/Bull operating systems
- The ACOS-4 home page
- The ACOS-2 home page
- The ACOS home page, including some information on ACOS-6
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