TOPS-20

Later Operating system for PDP10. Started by BBN as Tenex. DEC changed it to be TOPS-20.

  • Version 1.

    Currently nothing available. Released around 1976.

  • Version 2.

    System tape available. Released around 1977.

  • Version 3.

    Sources available. Tree structured directory, Account validation. Released around 1978.

  • Version 3A.

    System and sources available. 2060 and 2020 support, DECNET Phase II. Released around 1978. Build system and tapes available here

  • Version 4.0

    System and sources available. 4.0 does not run on 2060. Released around 1978.

  • Version 4.1

    System and sources available. Fixed 2060 support on 4.0. Released around 1978. Build system and tapes available here

  • Version 5.0

    System and sources available. 2020 no longer supported. Extended addressing. Released around 1982.

  • Version 5.1

    System and sources available. Released around 1982. Build system and tapes available here

  • Version 6.1

    System and sources available. Released around 1985. Build system and tapes available here

  • Version 7.1

    System and sources available. Released around 1988.

    Build system and tapes available here