Unix-like: Difference between revisions

Revision as of 19:53, 24 July 2004

Revision as of 03:37, 6 August 2004

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==The term "Unix-like" and the UNIX trademark==

[[The Open Group]], which owns the UNIX trademark and administers the Single UNIX Specification, considers "UNIX-like" to be a usage problem, and believes that a better alternative term would be the term "[[POSIX]]-conforming system". However, the term "POSIX-conforming" has its own problems. For example, there are systems which conform to at least the key POSIX standards (e.g., [[Microsoft Windows]]) and can claim to be POSIX-conforming, but that are nevertheless not Unix-like and many applications written to compile and run on Unix will not work on them.

==Early Unix-like systems==

The first "Unix-like" operating systems were developed because of [[AT&T]]'s licensing of Unix, which prevented the sale of Unix to commercial organisations. The Unix-like operating systems that were available in the [[1980s]] and early [[1990s]] included Idris, [[Coherent (operating system)|Coherent]], [[UniFlex]] and [[Minix]] (a [[computer science]] teaching system).

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== Unix-like open source operating systems ==

The term is most often used as a simple way of referring to the Unix-like [[open source]] operating systems:

* [[Apple Darwin|Darwin]]

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==See also==

*[[Berkeley Software Distribution]]

*[[Linux distribution]]s

*[[Listlist of Unix programs]]

[[Category:Unix(like) operating systems]]

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