DEMOS

For other uses, see DEMOS (disambiguation).

DEMOS
DEMOS-DVK 3.0, 2011
DeveloperKurchatov Institute of Atomic Energy, DEMOS Co-operative
OS familyUnix-like (BSD)
Working stateDiscontinued
Initial release1982; 43 years ago (1982)
Final release2.x / 1991; 34 years ago (1991)
Available inRussian
PlatformsSM-4, Elektronika-1082, Elektronika-85, BESM, ES EVM, VAX-11, PC/XT, Motorola 68020
Kernel typeMonolithic
Default
user interface		Command-line interface
Preceded byMNOS

DEMOS (Dialogovaya Edinaya Mobilnaya Operatsionnaya Sistema: Russian: Диалоговая Единая Мобильная Операционная Система, ДЕМОС, lit. 'Interactive Unified Portable Operating System') is a Unix-like operating system developed in the Soviet Union. It is derived from Berkeley Software Distribution (BSD) Unix.

Development

DEMOS's development was initiated in the Kurchatov Institute of Atomic Energy in Moscow in 1982, and development continued in cooperation from other institutes, and commercialized by DEMOS Co-operative which employed most key contributors to DEMOS and to its earlier alternative, MNOS (a clone of Version 6 Unix). MNOS and DEMOS version 1.x were gradually merged from 1986 until 1990, leaving the joint OS, DEMOS version 2.x, with support for different Cyrillic script character encoding (charsets) (KOI-8 and U-code, used in DEMOS 1 and MNOS, respectively).

Initially it was developed for SM-4 (a PDP-11/40 clone) and SM-1600. Later it was ported to Elektronika-1082, BESM, ES EVM, clones of VAX-11 (SM-1700), and several other platforms, including PC/XT, Elektronika-85 (a clone of DEC Professional), and several Motorola 68020-based microcomputers.

The development of DEMOS effectively ceased in 1991, when the second project of the DEMOS team, RELCOM, took priority.

See also

References

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