What is the importance of an OS ?

An Operating System is a program which acts as an interface between a user and the hardware. For example, Microsoft Windows 10, Linux etc.

The primary goal of an operating system is to make the computer system convenient to use and secondary goal is to use computer hardware in an efficient manner. It performs the following functions:

1. It controls all other components of the computer system.
2. It coordinates the use of the hardware among the various application programs for the various users.
3. It manages the CPU time.
4. It manages the main memory of the computer.
5. It executes all the programs.