DEMOS

For other uses, seeDEMOS (disambiguation).

DEMOS

DEMOS-DVK3.0, 2011
Developer	Kurchatov Institute of Atomic Energy,DEMOS Co-operative
OS family	Unix-like(BSD)
Working state	Discontinued
Initial release	1982(1982)
Final release	2.x / 1991(1991)
Available in	Russian
Platforms	SM-4,Elektronika-1082,Elektronika-85,BESM,ES EVM,VAX-11,PC/XT,Motorola 68020
Kerneltype	Monolithic
Default user interface	Command-line interface
Preceded by	MNOS

DEMOS(Dialogovaya Edinaya Mobilnaya Operatsionnaya Sistema:Russian:Диалоговая Единая Мобильная Операционная Система, ДЕМОС,lit. 'Interactive Unified Portable Operating System') is aUnix-likeoperating systemdeveloped in theSoviet Union.It is derived fromBerkeley Software Distribution(BSD) Unix.

Development

DEMOS's development was initiated in theKurchatov Institute of Atomic EnergyinMoscowin 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 ofVersion 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 differentCyrillic scriptcharacter encoding(charsets) (KOI-8andU-code,used in DEMOS 1 and MNOS, respectively).

Initially it was developed forSM-4(aPDP-11/40clone) and SM-1600. Later it was ported toElektronika-1082,BESM,ES EVM,clones ofVAX-11(SM-1700), and several other platforms, includingPC/XT,Elektronika-85(a clone ofDEC Professional), and severalMotorola 68020-based microcomputers.

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

See also

• MOS (operating system)

References

• Mapping Russian Cyberspace— Rafal Rohozinski,United Nations Research Institute for Social Development,1999
• https://astr0baby.wordpress /2016/10/17/soviet-unix-clone-demos/
• https:// opendemocracy.net/en/odr/usenet-coup/