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Line 1: {{library}}'''POSIX''' or "Portable Operating System Interface" is ~~the collective name of~~ a ~~family~~standard offor ~~related~~systems ~~standards~~that ~~specified~~resemble by[[Unix]]. ~~the~~The ~~IEEE~~current toversion, ~~define~~[http://pubs.opengroup.org/onlinepubs/9699919799/toc.htm ~~the~~POSIX.1-2008], ~~application~~is ~~programming~~a ~~interface~~project ~~(API)~~of ~~for~~both ~~software compatible with variants of~~the [[~~UNIX~~IEEE]] and the Open Group. More information ~~found~~is onat [~~http~~[wp:~~//en.wikipedia.org/wiki/Posix~~POSIX\|POSIX ~~the~~at ~~wiki~~Wikipedia]]. * POSIX defines an [[API]] for [[C]] programs, with functions such as <tt>fork()</tt>, <tt>opendir()</tt>, <tt>regcomp()</tt>, <tt>wait()</tt> and <tt>unlink()</tt>. * POSIX also defines commands such as <tt>[[AWK\|awk]]</tt>, <tt>[[bc]]</tt>, <tt>grep</tt>, <tt>ls</tt>, <tt>[[m4]]</tt>, <tt>rm</tt>, <tt>[[sed]]</tt> and <tt>[[UNIX Shell\|sh]]</tt>. The pages in this category have examples marked <nowiki>{{libheader\|POSIX}}</nowiki>. These examples require some of the POSIX functions; a [[C]] or [[C++]] example that calls <tt>fork()</tt> would be in this category. Some languages, like [[Ada]] or [[Perl]], have a POSIX library. POSIX threads go in [[:Category:pthread]]. [[Category:Encyclopedia]]