Operating System (OS)
An operating system (OS) is a piece of software that serves as a user interface for computer hardware. To run other programs, every computer system needs at least one operating system. Applications such as browsers, Microsoft Office, Notepad games, etc. require an environment in order to execute and carry out their functions.
Without knowing computer language, the OS enables you to communicate with the computer. Without an operating system, a user is unable to operate any computer or mobile device.