What is operating system?

What is Operating System:

An operating system is an interface between the user and the computer hardware. It controls the execution of all the programs. It provides users an environment in which a user can execute programs conveniently and efficiently

Without a brain, we are not able to do anything at all. An operating system is the brain of a computer.

In technical terms, it is system software that manages hardware. An operating system controls the allocation of resources and services such as memory, processors, devices, and information.

Components of Computer System:

A computer system can be divided mainly into four components:

  1. Hardware
  2. Operating System
  3. Application
  4. Users as shown in figure
Components of Computer System


The user is the one who gives instructions to the computer system. They can be categorized as:

  1. Programmers
  2. Operational users
  3. End users.

Hardware: It includes physical parts such as CPU, motherboard, Monitor, etc.

Operating system: An os is a software program that enables the computer hardware to communicate and operate with the computer software. Without the computer os, a computer system and software programs would be useless.

Application programs: Spreadsheets, Word processors, compilers, web browsers, etc.

Types of operating system:

  1. Batch operating system: It is one of the oldest operating system. In the batch operating system, programs and data are collected together in a batch before processing starts.
  2. Multitasking operating system: Task means a process. A process means a program in execution. In a multatsking operating system a CPU performs multiple tasks at a time.
  3. Time-Sharing System: The main idea of timesharing systems is to allow a large number of users to interact with a single computer concurrently.
  4. Multiprocessor systems: Multiprocessing is the use of two or more central processing units within a single computer system. The term multiprocessing also refers to the ability of a system to support more than one processor or the ability to allocate tasks between them.
  5. Distributed Systems: A distributed system consists of a collection of autonomous computers, connected through a network and distributed middleware, which enables computers to coordinate their activities and to share the resources of the system so that users perceive the system as a single, integrated computing facility.
  6. Real-time systems: A real-time OS  is defined as one that controls an environment by receiving data, processing them, and taking action or returning results very quickly to affect the functioning of the environment.
  7. Clustered Systems: A cluster is a collection of computers in which any member of the cluster is capable of supporting the processing functions of any other member.
  8. Mobile operating systems: A mobile OS is the one that controls smartphones, personal digital assistants, tablets, and information appliances.

Functions of an Operating System

  • Processor Management
  • Memory Management
  • Device Management
  • File Management
  • Security : Preventing unauthorized access to programs and data
  • Error Detecting
  • Application that allows standered commnication between software and your computer.
  • User Interface : This allows user to communicate with your computer.

Kalpesh Khairnar

Hello Everyone, I'm Kalpesh. Energetic and passionate college student with the ability to work with open-source technologies. I spend most of my time in programming, blogging and helping other programming geeks.

Leave a Reply

Your email address will not be published. Required fields are marked *