Operating system

An operating system is a program that manages the computer hardware and software resources and provides common services for computer programs.

For hardware functions such as input and output and memory location, the operating system acts as an intermediary between programs and the computer hardware,^] although the application code is usually executed directly by the hardware and frequently makes system calls to an OS function or is interrupted by it. Operating systems are found on many devices that contain a computer – from cellular phones and video game consoles to web servers and supercomputers.