List of Unix systems

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) This article is missing information about many Unix systems; the term is not limited to just one strain and it is inappropriate and even POV to list it as such.. Please expand the article to include this information. Further details may exist on the talk page. (October 2020) This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "List of Unix systems" – news · newspapers · books · scholar · JSTOR (April 2024) (Learn how and when to remove this message) (Learn how and when to remove this message)

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.