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.

It’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.

An archive of the DEMOS source code can found here: https://github.com/bpr97050/DEMOS There’s some interesting comments and mailing list archives in that repository as well. :)


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  • WalrusDragonOnABike [they/them]
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    10 days ago

    It’s true. I always just sort home/subscribed by most recent comments to find the mega. It gets harder when people aren’t commenting.

      • WalrusDragonOnABike [they/them]
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        9 days ago

        i’m interested in how high up the trans mega is on other instances

        home/subscribed depends on what you subscribe to rather than your instance. For me, its currently number 1, but its basically always in the top 10 for me.

        If I sort by local and newest comment, the most recent activity was 3 days ago.

        If I go to All and sort by most comments of all time: 1&2: Trans Mega 3: News Mega 4-7: Trans Mega 8-9: News Mega 10: Trans Mega Have to go to the 16th most comments of all time to get one that isn’t one of those two, which is “What’s some really unpopular opinion you have?” to Asklemmy@lemmy.mlEnglish 1 year ago.