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ISO/IEC/IEEE 9945:2009(E) - International Standard - Information technology Portable Operating System Interface (POSIX®) Base Specifications, Issue 7

Description: Revision and Adoption of IEEE Std 1003.1-2008, this standard defines a standard operating system interface and environment, including a command interpreter (or ‘‘shell’’), and common utility programs to support applications portability at the source code level. It is intended to be used by both application developers and system implementers.
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