What is an os(Operating System)? In 2 Topics You’ll Learn What is an os?

I am excited to teach you this course and I am sure you will enjoy it too so let’s start the first section with the first lecture.

What is an OS(operating system)?

Now this is the starting point for anyone who needs to study operating systems this is the most basic question that will come to your mind so let’s deal with this question first in this article we will discuss two topics to understand what is an os( operating system) first you will have a look at the definition of an operating system and we will try to understand its meaning as well.

In the second topic we will see where exactly an OS(operating system) fits in the overall computer system this will help us understand the role played by an operating system in the functioning of a computer so let’s start.

Whenever you switch on your laptop/desktop/tablet or even a mobile phone you might have observed that it takes some time to load your home screen here your device is starting a software in the background and this software will help you control your computer or mobile device.

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Operating System
Source: Google

Let you run other applications on top of it this software will be running as long as your device is running and it stops only when your device shuts down if you are even remotely a tech-savvy person you will know what this software is an operating system.

To define it formally an operating system is an important piece of program that manages the computer hardware and other software applications using an operating system you can utilize the hardware components like CPU memory input and output devices like keyboard mouse etc…

So therefore an operating system also acts as an intermediate between the computer hardware and you the computer user you can say it acts as a middleman this is because the user cannot give commands directly to the CPU in machine language nor can the CPU interact with the user directly.

So there needs to be a middleman who communicates and translates all interactions between the user and the CPU now let’s see where exactly the operating system fits in the overall computer system structure.

A computer can be divided into four components at the core we have the hardware which comprises CPU memory and other i/o devices on top of this there is an operating system that controls and coordinates the use of hardware by various applications application programs are the software tools or utilities which the users run to carry out their tasks these programs can utilize the hardware resources through the help of operating systems.

Some examples of application programs are the word processors spreadsheets compilers and even the browser you have opened right now to read this article and finally on the other end.

operating system

We have real computer users who interact with the computer in order to get some tasks performed so based on this figure here you can see that the operating system occupies a crucial spot in the architecture of a computer system and without operating systems, it would be very difficult to utilize the computer effectively.

So that should give you a basic idea about what is an os(operating system) if you still have any queries comment below and I shall answer them for you as soon as the exercise for this article is concerned.


It is very simple to create a definition of what is an os(operating system) in your own words and post it on the comment below this will help you to put your understanding in words and it will also help others to get a different perspective of the same definition so please do that and I will see you in the next article.

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