KeyKOS is a
persistent, pure
capability-based
operating system
An operating system (OS) is system software that manages computer hardware and software resources, and provides common daemon (computing), services for computer programs.
Time-sharing operating systems scheduler (computing), schedule tasks for ...
for the
IBM
International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue, is an American Multinational corporation, multinational technology company headquartered in Armonk, New York, and present in over 175 countries. It is ...
S/370 mainframe computer
A computer is a machine that can be Computer programming, programmed to automatically Execution (computing), carry out sequences of arithmetic or logical operations (''computation''). Modern digital electronic computers can perform generic set ...
s. It allows
emulating the environments of
VM,
MVS, and Portable Operating System Interface (
POSIX
The Portable Operating System Interface (POSIX; ) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. POSIX defines application programming interfaces (APIs), along with comm ...
). It is a predecessor of the
Extremely Reliable Operating System
Extremely Reliable Operating System (EROS) is an operating system developed starting in 1991 at the University of Pennsylvania, and then Johns Hopkins University, and The EROS Group, LLC. Features include automatic data and process persistence, s ...
(EROS), and its successor
operating system
An operating system (OS) is system software that manages computer hardware and software resources, and provides common daemon (computing), services for computer programs.
Time-sharing operating systems scheduler (computing), schedule tasks for ...
s, CapROS, and Coyotos. KeyKOS is a
nanokernel-based operating system.
In the mid-1970s, development of KeyKOS began at
Tymshare, Inc., under the name
GNOSIS. In 1984,
McDonnell Douglas (MD) bought Tymshare. A year later MD spun off Key Logic, which bought GNOSIS and renamed it ''KeyKOS''.
References
External links
* , Norman Hardy
GNOSIS: A Prototype Operating System for the 1990s a 1979 paper, Tymshare Inc.
a 1988 paper, Key Logic, Inc.
{{Operating-system-stub
Nanokernels
Capability systems
Microkernel-based operating systems