POSIX

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

Portable Operating System Interface (IEEE 1003)
AbbreviationPOSIX
StatusPublished
Year started1988; 36 years ago (1988)
Latest versionIEEE Std 1003.1-2024
2024; 0 years ago (2024)
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

The Portable Operating System Interface (POSIX; IPA: /ˈpɒz.ɪks/[1]) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems.[1] POSIX defines 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.[1][2] POSIX is also a trademark of the IEEE.[1] POSIX is intended to be used by both application and system developers.[3]

  1. ^ a b c d "POSIX.1 FAQ". The Open Group. 13 June 2020. Retrieved 20 February 2023.
  2. ^ "IEEE 1003.1-2024". IEEE Standards Association.
  3. ^ "Introduction". The Open Group Base Specifications Issue 7, 2018 edition. Retrieved 22 July 2021.