Question

What is an operating system? what is purpose of different operating systems?

Answer 1

An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs.
An operating system has three main functions: (1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers, (2) establish a user interface, and (3) execute and provide services for applications software.

Answer 2

Operating system :

Operating system is also called system software. Most people also speak OS by its short name. It is also called the heart of the computer. Operating system is a system software, which works like Interface between user means you and Computer Hardware.

The computer, this OS gives you the means to use the computer. As you listen to the song, double click on the word document, sit down with three four windows, write something in the keyboard, and save some file in the computer, you can never do all this without operating system.

So this OS is the software with which you run your computer. So whenever you buy a new computer, first of all you have to load Window 8 or Windows10 in it from the shopkeeper and after that you take the computer to your home. Otherwise without operating system, you can never turn on your computer.