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An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. These are the best most commonly used operating systems are Microsoft Windows, Apple macOS, Linux, Android, and Apple's iOS.

An Operating System can be defined as an interface between user and hardware. It is responsible for the execution of all the processes, Resource Allocation, CPU management, File Management, and many other tasks.

In the Computer System, Hardware can only understand machine code in the form of 0 and 1 which doesn't make any sense to a naive user. We need a system that can act as an intermediary and manage all the processes and resources present in the system. The purpose of an operating system is to provide an environment in which a user can execute programs in a convenient and efficient manner.

What does an Operating system do?

  1. Process Management
  2. Process Synchronization
  3. Memory Management
  4. CPU Scheduling
  5. File Management
  6. Security

Every computer system must have at least one operating system to run other programs. Applications software like Google Chrome, Firefox, Safari Browsers, Microsoft Office, Notepad, etc., need some environment to run and perform its tasks.

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