Portable Operating System Interface (POSIX) standard

The Portable Operating System Interface (POSIX) is a set of technical standards that ensure different operating systems, like Linux and UNIX, can work together smoothly. It defines common rules for tasks such as managing files, running programs, and communicating with hardware. Think of POSIX as a shared language that allows software to run consistently across various systems, making it easier for developers to create software that is compatible and portable, regardless of the underlying operating system. This standardization helps improve software reliability and streamline development processes.