Q14658
Sign in to saveAlso known as IEEE 1003, ISO/IEC 9945, Portable Operating System Interface
The Portable Operating System Interface (POSIX; ) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. In order to define a level of compatibility, POSIX specifies many aspects of functionality that can be classified as application programming interface (API), command-line shell, and shell commands. Originally derived from commonly-found Unix APIs, shells, and commands (partly because Unix was considered manufacturer-neutral), today many systems conform to the standard including branded Unix systems, Unix-like systems, and man
POSIX is a set of standards created by the IEEE Computer Society that helps different operating systems work together by defining common programming interfaces, command shells, and commands. It matters because it allows software and systems to be more compatible across different platforms, whether they're traditional Unix systems or Unix-like systems.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Technology standard.title
- Portable Operating System Interface (IEEE 1003)
- Technology standard.status
- Published
- Technology standard.version
- IEEE Std 1003.1-2024
- Technology standard.organization
- Austin Group (IEEE Computer Society, The Open Group, ISO/IEC JTC 1/SC 22/WG 15)
- Technology standard.related_standards
- ISO/IEC 9945
- Technology standard.abbreviation
- POSIX
- Technology standard.domain
- Application programming interfaces
via Wikipedia infobox
Wikidata facts
- Official website
- pubs.opengroup.org/onlinepubs/9699919799
Show 1 more fact
- Commons category
- POSIX
via Wikidata · CC0
~12 min read
Article
25 sectionsContents
- Name
- Versions
- Before 1997
- POSIX.1
- POSIX.1b
- POSIX.1c
- POSIX.2
- POSIX.1-2001
- POSIX.1-2008
- POSIX.1-2017
- POSIX.1-2024
- Controversies
- 512- vs 1024-byte blocks
- Conformance
- Certified
- Formerly certified
- Partially conformant
- Partially conformant via compatibility layer {{Anchor |Compliant via compatibility feature}}
- Conformance via subsystem
- For Windows
- For OS/2
- For DOS
- See also
- References
- External links
The Portable Operating System Interface (POSIX; ) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. In order to define a level of compatibility, POSIX specifies many aspects of functionality that can be classified as application programming interface (API), command-line shell, and shell commands. Originally derived from commonly-found Unix APIs, shells, and commands (partly because Unix was considered manufacturer-neutral), today many systems conform to the standard including branded Unix systems, Unix-like systems, and many systems that were historically unrelated to Unix.
The standardized user command line and scripting interface were based on the UNIX System V Bourne shell. Many user-level programs, services, and utilities (including awk, echo, ed) were also standardized, based on UNIX System V versions of them, along with required program-level services (including basic I/O: file, terminal, and network). POSIX also defines a standard threading library API which is supported by most modern operating systems.