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Kronos is an operating system with time-sharing capabilities, written by Control Data Corporation in the 1970s. Kronos ran on the 60-bit CDC 6000 series mainframe computers and their successors. CDC replaced Kronos with the NOS operating system in the late 1970s, which were succeeded by the NOS/VE operating system in the mid-1980s.[1]

Kronos
DeveloperControl Data Corporation
Working stateHistoric
Initial release1970s
Latest releaseKronos level 439
Marketing targetMainframe computers
PlatformsCDC 6000 series and successors
LicenseProprietary

The MACE operating system and APEX were forerunners to KRONOS. It was written by Control Data systems programmer Greg Mansfield, Dave Cahlander, Bob Tate and three others.

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