CDC Kronos

Kronos

Developer	Control Data Corporation
Working state	Historic
Initial release	1971; 53 years ago (1971)
Latest release	Kronos level 439
Marketing target	Mainframe computers
Platforms	CDC 6000 series and successors
Influenced by	Chippewa Operating System
License	Proprietary

Kronos is an operating system with time-sharing capabilities, written by Control Data Corporation in 1971.^[1] 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.^[2][3]

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.

See also

• CDC SCOPE

References

1. "CDC Operating System History Mar76" (PDF). Control Data Corporation. Retrieved 7 March 2023.
2. "Kronos 2.1 Time-Sharing User's Reference Manual" (PDF). Control Data Corporation. Retrieved 25 July 2011.
3. Lindsay, David S. (1976-03-29). "A hardware monitor study of a CDC KRONOS system". Proceedings of the 1976 ACM SIGMETRICS conference on Computer performance modeling measurement and evaluation - SIGMETRICS '76. New York, NY, USA: Association for Computing Machinery. pp. 136–144. doi:10.1145/800200.806190. ISBN 978-1-4503-7497-2. S2CID 18828764.