POSIX

The Portable Operating System Interface (POSIX; IPA: /ˈpɒz.ɪks/) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. POSIX defines both the system and user-level application programming interfaces (APIs), along with command line shells and utility interfaces, for software compatibility (portability) with variants of Unix and other operating systems. POSIX is also a trademark of the IEEE. POSIX is intended to be used by both application and system developers.

Not to be confused with Unix, Unix-like, or Linux.

Portable Operating System Interface (IEEE 1003)
AbbreviationPOSIX
StatusPublished
Year started1988 (1988)
Latest versionIEEE Std 1003.1-2017
2017 (2017)
OrganizationAustin Group (IEEE Computer Society, The Open Group, ISO/IEC JTC 1/SC 22/WG 15)
Related standardsISO/IEC 9945
DomainApplication programming interfaces
Websiteposix.opengroup.org
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