POSIX. This is the Single UNIX Specification, Version 4 (SUSv4).

This SUS consists of:
* Base Specifications, Issue 7
** Base Definitions, Issue 7
** System Interfaces, Issue 7
** Shell and Utilities, Issue 7
** Rationale, Issue 7, (Informative)
* X/Open Curses, Issue 7

The Base Specifications are technically identical to POSIX.1-2008, which is IEEE Std 1003.1-2008.

This version had 1833 interfaces, of which 1191 were in the System Interfaces section.

2013 Edition

Technical

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