POSIX3

POSIX3 refers to a family of standards developed by the IEEE Computer Society's Portable Operating System Interface (POSIX) group. These standards define a common application programming interface (API) for operating systems. The primary goal of POSIX is to promote portability of applications across different Unix-like operating systems. It provides a set of system calls and library functions that developers can use to write programs that are independent of the underlying hardware and specific operating system implementation.

The POSIX standards are organized into several parts, addressing different aspects of operating system interfaces. Key areas covered include process management, memory management, file system operations, input/output, and inter-process communication. Adherence to POSIX standards helps ensure that software developed for one POSIX-compliant system can be compiled and run on another with minimal or no modification. This significantly reduces development costs and increases the reach of software applications.

While the term POSIX3 is not a formal designation for a specific standard version, it is sometimes used informally to refer to the evolution of POSIX standards beyond their initial iterations. The POSIX standards have undergone continuous development and revision to incorporate new features and address changing technological landscapes. Various versions and extensions exist, such as POSIX.1, POSIX.2, and extensions for real-time systems. The ongoing effort aims to provide a stable and comprehensive interface for a wide range of computing environments.