DEMOS
{{Short description|Unix-like operating system from the Soviet era}}
{{Other uses}}
{{Use dmy dates|date=May 2021}}
{{Infobox OS
| name = DEMOS
| logo =
| screenshot =ДЕМОС-ДВК-3.0.jpg
| caption =DEMOS-DVK 3.0, 2011
| developer = Kurchatov Institute of Atomic Energy, DEMOS Co-operative
| source model =
| kernel type = Monolithic
| supported platforms = SM-4, Elektronika-1082, Elektronika-85, BESM, ES EVM, VAX-11, PC/XT, Motorola 68020
| ui = Command-line interface
| released = {{Start date and age|1982}}
| latest release version = 2.x
| latest release date = {{Start date and age|1991}}
| discontinued = Yes
| marketing target =
| language = Russian
| update model =
| package manager =
| working state = Discontinued
| license =
| website =
| preceded by = MNOS
| succeeded by =
}}
DEMOS (Dialogovaya Edinaya Mobilnaya Operatsionnaya Sistema: {{langx|ru|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,{{Cite web |url= https://web.archive.org/web/20161021142113/http://ache.vniz.net/demos.html |title= THE WHOLE TRUTH ABOUT DEMOS
|last= |first= |date= December 1998 |website= web.archive.org|publisher= |access-date= 2 January 2025 |quote= "[DEMOS 2.x] could work in two encodings KOI-8 and YUKOD" |language=russian}} 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.
{{expand Russian|ДЕМОС|date=December 2016}}
See also
References
{{Reflist}}
- [https://www.unrisd.org/80256B3C005BCCF9/(httpAuxPages)/879B8965BF0AE0ED80256B67005B738A/$file/dp115.pdf Mapping Russian Cyberspace] — Rafal Rohozinski, United Nations Research Institute for Social Development, 1999
- https://astr0baby.wordpress.com/2016/10/17/soviet-unix-clone-demos/
- https://www.opendemocracy.net/en/odr/usenet-coup/
{{no footnotes|date=November 2008}}
{{Unix}}
{{Russian operating systems}}