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POSIX defines both the system and user-level application programming interfaces (APIs), along with command line shells and utility interfaces.
POSIX.1-2017 defines a standard operating system interface and environment, including a command interpreter (or “shell”), and common utility programs.
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POSIX (Portable Operating System Interface) is a set of standard operating system interfaces based on the Unix operating system.

POSIX

Operating system
The Portable Operating System Interface is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. Wikipedia
Abbreviation: POSIX
Domain: Application programming interfaces
Latest version: IEEE Std 1003.1-2024; 2024; 0 years ago
Related standards: ISO/IEC 9945
Status: Published

Nov 9, 2021 · POSIX stands for Portable Operating System Interface. It's a family of standards specified by IEEE for maintaining compatibility among operating systems.
Jun 14, 2024 · POSIX.1-2024 defines a standard operating system interface and environment, including a command interpreter (or “shell”), and common utility programs.
Jun 29, 2023 · POSIX is a standard specified by the IEEE developed in the 1980s for maintaining its compatibility among the operating systems.
POSIX.1-2024 defines a standard operating system interface and environment, including a command interpreter (or "shell"), and common utility programs.
Jun 20, 2024 · POSIX stands for Portable Operating System Interface, a standard developed by the IEEE (Institute of Electrical and Electronics Engineers) that ...