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List of Unix systems#Unix-like operating systems

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{{incomplete|many Unix systems; the term is not limited to just one strain and it is inappropriate and even POV to list it as such.|date=October 2020}}

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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.

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[[Research Unix]]

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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,{{cite web|url=http://yarchive.net/comp/bsd.html|title=alt.folklore.computers: BSD (Dennis Ritchie)|first=Dennis|last=Ritchie|date=26 October 2000|access-date=3 July 2014}} which also included some BSD code:{{cite news | url=https://archive.org/stream/byte-magazine-1983-10/1983_10_BYTE_08-10_UNIX#page/n133/mode/2up | title=The Unix Tutorial / Part 3: Unix in the Microcomputer Marketplace | work=BYTE | date=October 1983 | access-date=30 January 2015 | author=Fiedler, Ryan | pages=132}}

{{blockquote|Research Unix 8th Edition started from (I think) BSD 4.1c, but with enormous amounts scooped out and replaced by our own stuff. This continued with 9th and 10th. The ordinary user command-set was, I guess, a bit more BSD-flavored than SysVish, but it was pretty eclectic.}}

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.

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  • 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 =

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Other Unix operating systems

Below are other certified Unix operating systems:{{Cite web |title=The Register of UNIX® Certified Products |url=https://www.opengroup.org/openbrand/register/ |access-date=2024-04-26 |website=www.opengroup.org}}

  • macOS: Heavily based on BSD, macOS is registered as certified Unix 03 brand on both versions (Intel and Apple silicon-based).
  • SCO OpenServer: Another operating system by SCO. Registered as Unix 93 “single and Multi-processor Industry Standard Intel architecture platform”.
  • 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

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See also

Notes

{{Notelist}}

References

{{Reflist}}

{{Unix-like}}

Unix systems