PARALLEL AND MULTIPROCESSOR SYSTEMS

This section lists operating systems designed to control multiprocessors and other parallel and specialized architectures. OSs for architectures designed for high reliability were listed in a previous section.

AMOK

A Modular Operating Kernel for the CRAY-1 at the Institute for Defense Analysis. A modular timesharing system providing files, directories, processes, and pipes. Early 1980s [Huskamp 1985].

COS

Cray Operating System. OS for the Cray-1 Pipelined Supercomputer. Late 1970s [Larson 1984].

CTSS

Cray Timesharing System at Lawrence Livermore Labs. Early 1980s. Based on LTSS. [Fong 1985].

DEMOS

Message-based OS for the CRAY-1, developed at Los Alamos. Late 1970s [Baskett & Montague 1977, Powell 1977].

EMBOS

Message-based OS for the ELXSI multiprocessor. Mid 1980s [Olson 1985].

HEP

Parallel OS for the HEP MIMD Computer. Late 1970s [Schmidt 1980].

HYDRA

OS for C.mmp Research Multiprocessor. Carnegie-Mellon U. Early 1970's [Wulf et al 1974, 1975, 1980].

iMAX

Multiprocessor OS for the Intel iAPX 432 object-based computer. Intel Corp., Early 1980s [Kahn et al 1981].

Mach

Multiprocessor version of UNIX developed at Carnegie-Mellon University. Late 1980s.

Medusa

OS for Cm* Research Multiprocessor. Carnegie-Mellon U. Late 1970's [Ousterhout et al 1980].

Meglos

OS for a multiprocessor supercomputer, built from multiple 68000s and a VAX. Provides virtual circuits for two-way and broadcast messages. Mid 1980s [Gaglianello & Katseff 1985].

StarOS

One of two major operating systems developed for the Cm* multiprocessor. Based on concept of task forces. Carnegie-Mellon U. Late 1970s [Jones et al 1979].

TWOS

Time Warp Operating System. An OS developed at the Caltech Jet Propulsion Laboratory for the Mark III Hypercube multiprocessor, primarily to support asynchronous discrete event simulation. Synchronizes events by unlimited process rollback. Late 1980s [Jefferson et al 1987].

VSOS

Operating system for the Cyber 205 pipelined processor. Mid 1970s.

XOS

Operating System for the experimental X-Tree Computer Architecture at the Univ. of Calif. at Berkelely. Early 1980s [Miller & Presotto 1981].

XYLEM

OS for the Cedar Multiprocessor, a high-speed, floating point, shared memory, UNIX-like system at the U. of Illinois. Mid 1980s [Emrath 1985].