The Portable Operating System Interface (POSIX)

The Portable Operating System Interface (POSIX) is a set of standardized rules that ensure different operating systems, like Linux, macOS, and Unix, can work together smoothly. It defines how software communicates with the operating system, allowing programs to run consistently across various systems without needing major modifications. Think of POSIX as a common language or interface that promotes compatibility and ease of development, making it easier for developers to create software that works on multiple platforms.