Why Operating System Is Also Called Main Software of a Computer?

Irene Olsen

An operating system (OS) is a crucial piece of software that runs on every computer. It acts as a bridge between the hardware and the software, allowing the computer to operate smoothly. In many ways, an operating system can be considered the main software of a computer.

What is an Operating System?

An operating system is a set of instructions that manages computer hardware resources and provides common services for computer programs. Without an OS, it would be impossible to run any applications or programs on a computer. The OS performs various tasks such as managing memory, input/output devices, and file systems.

Why is an Operating System Important?

The importance of an operating system cannot be overstated. It provides a platform for running different types of applications, from word processing to video editing. The OS allows multiple applications to run simultaneously while ensuring that each application has access to the necessary resources without interfering with other applications.

The OS also provides security and protection for the computer system. It prevents unauthorized access and protects against viruses and malware attacks.

How Does an Operating System Work?

An operating system works by controlling various hardware components such as processors, memory, storage devices, and input/output devices like keyboards and mice. It manages the flow of data between these components and ensures that they work together seamlessly.

The OS also provides users with interfaces for accessing various functions such as file management, network connectivity, and software installation. These interfaces can take many forms such as graphical user interfaces (GUIs) or command-line interfaces (CLIs).

Types of Operating Systems

There are several types of operating systems available today, each with its own strengths and weaknesses. Some common types include:

  • Windows – This is one of the most popular operating systems used worldwide.
  • MacOS – This is the default operating system used in Apple computers.
  • Linux – This is an open-source operating system that is highly customizable.
  • Android – This is a mobile operating system used in smartphones and tablets.


In conclusion, an operating system is the main software of a computer because it provides a platform for running applications, manages hardware resources, and provides security and protection for the computer system. It is an essential component of any computer system and plays a critical role in ensuring that the computer operates smoothly.