CDC Kronos

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Kronos
Developer Control Data Corporation
Working stateHistoric
Initial release1971;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

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Control Data Corporation (CDC) was a mainframe and supercomputer company that in the 1960s was one of the nine major U.S. computer companies, which group included IBM, the Burroughs Corporation, and the Digital Equipment Corporation (DEC), the NCR Corporation (NCR), General Electric, and Honeywell, RCA and UNIVAC. For most of the 1960s, the strength of CDC was the work of the electrical engineer Seymour Cray who developed a series of fast computers, then considered the fastest computing machines in the world; in the 1970s, Cray left the Control Data Corporation and founded Cray Research (CRI) to design and make supercomputers. In 1988, after much financial loss, the Control Data Corporation began withdrawing from making computers and sold the affiliated companies of CDC; in 1992, Cray established Control Data Systems, Inc. The remaining affiliate companies of CDC currently do business as the software company Dayforce.

<span class="mw-page-title-main">CDC 6600</span> Mainframe computer by Control Data

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Kronos can refer to:

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<span class="mw-page-title-main">CDC 6000 series</span> Family of 1960s mainframe computers

The CDC 6000 series is a discontinued family of mainframe computers manufactured by Control Data Corporation in the 1960s. It consisted of the CDC 6200, CDC 6300, CDC 6400, CDC 6500, CDC 6600 and CDC 6700 computers, which were all extremely rapid and efficient for their time. Each is a large, solid-state, general-purpose, digital computer that performs scientific and business data processing as well as multiprogramming, multiprocessing, Remote Job Entry, time-sharing, and data management tasks under the control of the operating system called SCOPE. By 1970 there also was a time-sharing oriented operating system named KRONOS. They were part of the first generation of supercomputers. The 6600 was the flagship of Control Data's 6000 series.

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<span class="mw-page-title-main">Chippewa Operating System</span> Computer operating system for 1960s-era mainframes

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NOS/VE is a discontinued operating system with time-sharing capabilities, written by Control Data Corporation in the 1980s. It is a virtual memory operating system, employing the 64-bit virtual mode of the CDC Cyber 180 series computers. NOS/VE replaced the earlier NOS and NOS/BE operating systems of the 1970s.

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.