| KeyKOS | |
|---|---|
| Developer | Tymshare (Norm Hardy, Bill Frantz, Charlie Landau) McDonnell Douglas Key Logic |
| Written in | C |
| OS family | Capability-based |
| Working state | Discontinued |
| Initial release | 1977; 49 years ago (1977) |
| Latest release | Final / 1988; 38 years ago (1988) |
| Marketing target | Research |
| Available in | English |
| Update method | Compile fromsource code |
| Supported platforms | S/370mainframe |
| Kernel type | Microkernel |
| Default user interface | Command-line interface |
| Preceded by | GNOSIS |
| Succeeded by | Extremely Reliable Operating System (EROS), CapROS, Coyotos |
| Official website | cap-lore |
KeyKOS is apersistent, purecapability-basedoperating system for theIBMS/370mainframecomputers. It allowsemulating the environments ofVM,MVS, and Portable Operating System Interface (POSIX). It is a predecessor of theExtremely Reliable Operating System (EROS), and its successoroperating systems, CapROS, and Coyotos. KeyKOS is ananokernel-based operating system.[1]
In the mid-1970s, development of KeyKOS began atTymshare, Inc., under the nameGNOSIS. In 1984,McDonnell Douglas (MD) bought Tymshare. A year later MD spun off Key Logic, which bought GNOSIS and renamed itKeyKOS.[2]
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