List of Unix systems explained

Each version of the UNIX Time-Sharing System evolved from the version before, with version one evolving from the prototypal Unix. Not all variants and descendants are displayed.

  • "Ken's new system" (Unics → Unix) (1969)
  • UNIX Time-Sharing System v1 (1971)
  • UNIX Time-Sharing System v2 (1972)
  • UNIX Time-Sharing System v3 (1973)
  • UNIX Time-Sharing System v4 (1973)
  • UNIX Time-Sharing System v5 (1974)
    • UNSW 01 (1978)
  • UNIX Time-Sharing System v6 (1975)
    • 1BSD (1978)
    • AUSAM (1978)
    • IS/1 (1977)
    • LSI-UNIX (1977)
    • Mini-UNIX (1977)
    • PWB/UNIX 1.0 (1977)
    • Wollongong Unix (1977)

The versions leading to v7 are also sometimes called Ancient UNIX. After the release of Version 10, the Unix research team at Bell Labs turned its focus to Plan 9 from Bell Labs, a distinct operating system that was first released to the public in 1993. All versions of BSD from its inception up to 4.3BSD-Reno are based on Research Unix, with versions starting with 4.4 BSD and Net/2 instead becoming Unix-like. Furthermore, 8th Edition Research Unix and on-wards had a close relationship to BSD. This began by using 4.1cBSD as the basis for the 8th Edition. In a Usenet post from 2000, Dennis Ritchie described these later versions of Research Unix as being closer to BSD than they were to UNIX System V,[1] which also included some BSD code:[2]

Commercial AT&T UNIX Systems and descendants

Each of the systems in this list is evolved from the version before, with Unix System III evolving from both the UNIX Time-Sharing System v7 and the descendants of the UNIX Time-Sharing System v6.

  • UNIX System III (1981)
  • UNIX System IV (1982)
  • UNIX System V (1983)
    • UNIX System V Release 2 (1984)
    • UNIX System V Release 3.0 (1986)
    • UNIX System V Release 3.2 (1987)
    • UNIX System V Release 4 (1988)
    • UNIX System V Release 4.2 (1992)
  • UnixWare 1.1 (1993)
    • UnixWare 1.1.1 (1994)
  • UnixWare 2.0 (1995)
    • UnixWare 2.1 (1996)
      • UnixWare 2.1.2 (1996)
  • UnixWare 7 (System V Release 5) (1998)
    • UnixWare 7.0.1 (1998)
  • UnixWare 7.1 (1999)
    • UnixWare 7.1.1 (1999)
    • UnixWare NSC 7.1+IP (2000)
    • UnixWare NSC 7.1+LKP (2000)
    • UnixWare NSC 7.1DCFS (2000)
  • Open Unix 8 (UnixWare 7.1.2) (2001)
    • Open Unix 8MP1 (2001)
    • Open Unix 8MP2 (2001)
    • Open Unix 8MP3 (2002)
    • Open Unix 8MP4 (2002)
  • SCO UnixWare 7.1.3 (2002)
    • SCO UnixWare 7.1.3 Update Pack 1 (2003)
    • SCO UnixWare 7.1.4 (2004)

Forks and ports

Other Unix operating systems

Below are other certified Unix operating systems.[4]

macOS

See main article: macOS. Heavily based on BSD, macOS is registered as certified Unix 03 brand on both versions (Intel and Apple silicon-based).

SCO OpenServer

See main article: OpenServer. Another operating system by SCO. Registered as Unix 93 “single and Multi-processor Industry Standard Intel architecture platform”.

z/OS

See main article: z/OS. z/OS by IBM is listed as two different operating systems, z/OS and z/OS V2R1. Both are Unix 95.

Unix-like operating systems

See also

Notes and References

  1. Web site: alt.folklore.computers: BSD (Dennis Ritchie). Dennis. Ritchie. 26 October 2000. 3 July 2014.
  2. News: The Unix Tutorial / Part 3: Unix in the Microcomputer Marketplace . BYTE . October 1983 . 30 January 2015 . Fiedler, Ryan . 132.
  3. Web site: SunSoft introduces first shrink-wrapped distributed computing solution: Solaris . sun.com . 13 April 2024 . https://web.archive.org/web/20071012124322/http://www.sun.com/aboutsun/media/presskits/25years/pr.html#solaris . 2007-10-12 . 1991-09-04.
  4. Web site: The Register of UNIX® Certified Products . 2024-04-26 . www.opengroup.org.

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