operating system :an operating system is a program that manages the computer hardware . It provides a basis for application programs and acts as an intermediary between the computer user and the computer hardware. For the operating system goals, it divides into two parts. Firstly , Executing user programs and make solving user problems easier. Secondly , Make the computer system convenient to use. When using  the operating system , we could use  the computer hardware in an efficient manner.

 

example :windows: windows operating system is the most common OS over the world , and it is developed by Microsoft Corporation

Linux: Linux is a free-to-use Unix operating system.

MacOS:Mac OS is an operating system that runs on Apple's Macintosh family of computers. And it is the first successful graphical user interface operating system in the commercial sector