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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    • imogen_underscore [it/its, she/her]@hexbear.netEnglish
      4·
      11 days ago

      glad i could share comrade. it’s something i’d be happy to potentially effortpost more about, it’s one of the things that really stuck with me from my one round of DBT (therapy that actually works for people like me? :o) and i think even a passing (hehe) understanding of it can rly benefit a lot of folks

      • MusicOwl [comrade/them, sie/hir]@hexbear.netMEnglish
        4·
        11 days ago

        Wholeheartedly agree. Would love to see an effortpost if you feel the call. I do emdr, and that has really helped me with a positive sense of self in many ways. Still have a long way to go though. Might just be my neurodivergence, but passing never made any sense to me.

        Yes, I experience dysphoria, not that this is a part of what makes me trans. This dysphoria is not due to any conception of comparing myself to cisfolk, really.