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POSIX terminal interface
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<p>The POSIX terminal interface is the generalized abstraction, comprising both an <a href="/facts/Application_programming_interface/GMlN4vUr">application programming interface</a> for programs, and a set of behavioural expectations for users of a <a href="/facts/Terminal_(telecommunication)/GTHNGWI5">terminal</a>, as defined by the <a href="/facts/POSIX/mQkSt234">POSIX</a> standard and the <a href="/facts/Single_Unix_Specification/w1ba5bDt">Single Unix Specification</a>. It is a historical development from the terminal interfaces of BSD version 4 and <a href="/facts/Seventh_Edition_Unix/ju5nRs7k">Seventh Edition Unix</a>. </p>