Not to be confused with Unix, Unix-like, or Linux.
POSIX (pron.: /ˈpɒzɪks/ poz-iks), an acronym for "Portable Operating System Interface", is a family of standards specified by the IEEE for maintaining compatibility between operating systems...
http://en.wikipedia.org/wiki/Posix
The old MS POSIX subsystem was replaced by the amusingly named SFU (Services for UNIX). Then that got replaced by the bought-in Interix.
Mac OS X is UNIX because it's certified under the Single UNIX Specification: http://en.wikipedia.org/wiki/Single_UNIX_Specification
Windows is not in any way UNIX. There aren't even any certified Linux distros (AFAIK). Mac OS X is UNIX.
Not to be confused with Unix, Unix-like, or Linux.
POSIX (pron.: /ˈpɒzɪks/ poz-iks), an acronym for "Portable Operating System Interface", is a family of standards specified by the IEEE for maintaining compatibility between operating systems...
http://en.wikipedia.org/wiki/Posix
The old MS POSIX subsystem was replaced by the amusingly named SFU (Services for UNIX). Then that got replaced by the bought-in Interix.
Mac OS X is UNIX because it's certified under the Single UNIX Specification: http://en.wikipedia.org/wiki/Single_UNIX_Specification
Windows is not in any way UNIX. There aren't even any certified Linux distros (AFAIK). Mac OS X is UNIX.