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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  • Luna [she/her, sae/saer]M
    ·
    edit-2
    4 days ago

    The fact that I've had an account on this website for approx. 7 months is baffling to me. I remember having too much anxiety to even create an account on here. I remember thinking I was cis. It feels so long ago, yet so recent, at the same time.

    Here's another appreciation post for you all. I genuinely have no idea where I would be or what I would think without you all. I love my trans comrades :trans-heart:

      • AernaLingus [any]
        ·
        3 days ago

        Touch screens are revisionist, we must revive the immortal science of T9

    • yewler [she/her]
      ·
      4 days ago

      I 100% would still be calling myself cis if it wasn't for this place. I love the people here sooooo much

    • MusicOwl [comrade/them, sie/hir]M
      ·
      3 days ago

      I found this place very early into my transition and am grateful for the bear creating a space that allowed me to embrace and love my transness.

      Love all of my trans comrades, trans-heart and, as always, down with cis. leslie-shining