POSIX
POSIX, or Portable Operating System Interface, is a set of standards designed to ensure compatibility between different operating systems. It defines how software applications should interact with the operating system, including system calls, command-line utilities, and programming interfaces. By adhering to POSIX standards, developers can create applications that run on various systems without needing significant modifications.
The POSIX standards are widely used in Unix-like operating systems, such as Linux and macOS. They help maintain consistency across different platforms, making it easier for developers to write portable code. This compatibility is crucial for software development, as it reduces the time and effort needed to adapt applications for different environments.