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ICT Class 4 - About Computers Notes

Comprehensive study notes for Class 4 - About Computers olympiad preparation

About Computers

Welcome to the chapter on About Computers for Class 4. In this chapter, you will learn what computers are, how they work, and why they are important in our daily life. By the end of this chapter, you will know the main parts of a computer and how computers help us at home, school, and work!

Introduction

Computers are smart machines that help us do many things quickly and easily. They can solve sums, store information, play games, and much more. Computers are used everywhere!

What is a Computer?

A computer is an electronic machine that takes instructions, processes information, and gives us results. It works very fast and does not make mistakes.

Main Parts of a Computer

  • Monitor: The screen that shows pictures and words.
  • Keyboard: Used to type letters, numbers, and symbols.
  • Mouse: Used to point, click, and select things on the screen.
  • CPU (Central Processing Unit): The brain of the computer that does all the work.
  • Speakers: Used to listen to sounds and music.
  • Printer: Used to print pictures and documents on paper.

How Do Computers Work?

  • We give instructions to the computer using the keyboard and mouse.
  • The CPU processes the instructions.
  • The monitor shows the results.
  • We can save our work and print it if needed.

Uses of Computers

  • Learning and studying
  • Playing games
  • Watching videos and listening to music
  • Drawing and painting
  • Sending emails and messages
  • Storing information
  • Printing documents

Fun Activity: Label the Computer Parts!

Draw a computer and label its parts: monitor, keyboard, mouse, CPU, speakers, and printer.

Summary

  • A computer is an electronic machine that helps us in many ways.
  • The main parts of a computer are monitor, keyboard, mouse, CPU, speakers, and printer.
  • Computers are used at home, school, and work.

Practice Questions

  1. Name three main parts of a computer.
  2. What does the CPU do?
  3. How do you give instructions to a computer?
  4. Where do you see pictures and words on a computer?
  5. List two uses of a computer at home.

Challenge Yourself

  • Draw and color a computer. Label all its parts.
  • Write five sentences about how computers help you in school.

Did You Know?

  • The first computers were very big and filled whole rooms!
  • Today, computers can fit in your pocket as smartphones and tablets.

Glossary

  • Monitor: The screen of the computer.
  • Keyboard: Used to type on the computer.
  • Mouse: Used to point and click.
  • CPU: The brain of the computer.
  • Printer: Used to print on paper.

Answers to Practice Questions

  1. Monitor, keyboard, mouse (any three: CPU, speakers, printer).
  2. It is the brain of the computer and does all the work.
  3. By using the keyboard and mouse.
  4. On the monitor.
  5. Playing games, watching videos, drawing, sending emails (any two).

Computers are amazing machines! Learn more about them and use them wisely.

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