Operating System Interface (POSIX)

POSIX (Portable Operating System Interface) is a standard that defines how different operating systems, like Linux or macOS, should communicate with applications and hardware. It creates a common language so software can run across multiple systems without needing major changes. Essentially, POSIX ensures different operating systems handle files, processes, and user commands in similar ways, making software development and interoperability more efficient. It helps developers write programs compatible with various systems, improving compatibility and consistency across different computing environments.