What is Operating System

What is Operating System

In this article, we will discuss about Operating System. What is an Operating System, what are the functions of Operating System

What is Operating System

An Operating System is a program that manages the computer hardware. It also provides a basis for application programs and acts as an intermediary between the computer user and the computer hardware.

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.

A computer system can be divided roughly into four components: the hardware, the operating system, the application programs and the users.

  • The hardware-the central processing unit(CPU), the memory, and the input/output(I/O)device-provides the basic computing resources for the system.
  • The application programs- such as word processors, spreadsheets, compilers, and Web browsers-define the ways in which these resources are used to solve users’ computing problems.
  • The operating system controls the hardware and coordinates its use among the various application programs for the various users.

What is Operating System : An operating system is similar to a government. Like a government, it performs no useful function by itself. It simply provides an environment within which other programs can do useful work.

An operating system has three main functions

  • manage the computer’s resources, such as the central processing unit, memory, disk drives, and printers,
  • establish a user interface, and
  • execute and provide services for applications software.

What does an Operating system do?

  • Process Management
  • Process Synchronization
  • Memory Management
  • CPU Scheduling
  • File Management
  • Security



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