CDC Kronos
| Developer | Control Data Corporation |
|---|---|
| Working state | Historic |
| Initial release | 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. 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.
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.