Software that controls the system software and system hardware resources and thus enables the proper functioning of computer programs is known to us as an Operating System (OS).
It handles all of the hardware, software, memory and process of the computer.
It is a very critical part of the system software. It allows the user to interact with the computer system without knowing the language of the computer. Mostly the computer systems come preloaded with the Operating System but it can be modified or replaced by some other version.
The commonly used Operating Systems on PC are :
- Windows by Microsoft
- Apple Mac OS X
Latest versions of Operating System use a Graphical User Interface (GUI). This helps to display everything on a screen in form of text and graphics and lets the user control the functions by using just a click of a mouse.
Every Operating System has a different look to its GUI and thus switching from one OS to the other may give a strange feeling and a little difficulty to understand and use. However, all the latest Operating System is designed in such a way that most of the features are similar and easy to use.
Without the Operating System no Application program can be executed and the computer system becomes useless.