POSIX

acronym

programming

Stands for: Portable Operating System Interface

A standard defining a portable interface for Unix-like operating systems.

Portable Operating System Interface (IEEE 1003.1) specifies APIs, shells, and utilities so software written to it runs across Unix-like systems. Its definition of a day as exactly 86,400 seconds is why POSIX time ignores leap seconds.

Also known as: posix

Sources

IEEE Std 1003.1 (POSIX)

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