KeyKOS

KeyKOS is a persistent, pure capability-based operating system for the IBM S/370 mainframe computers. It allows emulating the VM, MVS, and POSIX environments. It is a predecessor of the Extremely Reliable Operating System (EROS), and its successors, the CapROS and Coyotos operating systems. KeyKOS is a nanokernel-based operating system.^[1]

The development of KeyKOS started under the name GNOSIS in Tymshare, Inc. during the 1970s and continued under the name KeyKOS after being bought by Key Logic.^[2]

References

External links

KeyKOS Home Page
GNOSIS: A Prototype Operating System for the 1990s, a 1979 paper, Tymshare Inc.
KeyKOS - A Secure, High-Performance Environment for S/370, a 1988 paper, Key Logic, Inc.

Object-capability security

Concepts	Principle of least authority (POLA) Confused deputy problem Ambient authority File descriptor C-list Object-capability model Capability-based security Capability-based addressing Zooko's triangle Petnames

OS kernels	Hydra NLTSS KeyKOS EROS CapROS Coyotos Midori Fuchsia

Programming languages	Joule E Joe-E Cajita BitC

Filesystems	Tahoe-LAFS

Specialised hardware	Plessey System 250 Cambridge CAP IBM System/38 Intel iAPX 432

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