<A HREF="http://www.unix-systems.org/">UNIX </A> is the worldwide Single UNIX
Specification for *(OS)es, integrating X/Open Company's XPG4, IEEE's _(POSIX) Standards and ISO _(C language).

Unix-like is used also to refer to a large family of _(OS)es inspired from the original Unix from _(Bell Labs) (_(Unix histories)).

/("Unix" :attribute :topic :match :substring)