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The Portable Operating System Interface[edit]



POSIX is family of open system standards based on Unix. For example Bash is concerned with POSIX 1003.2, the Shell and Tools Standard.

A set of software standards being developed by the IEEE POSIX Working Group, to allow applications to be written to a single target environment in which they can run unchanged on a variety of systems. The POSIX specifications define characteristics for operating systems, DBMS, data interchange, network services, user interface, and programming interfaces. Several vendors plan to make their operating systems POSIX-compliant.
