Student Content

Chapter 1: Introduction
What is a Computer

A computer is a device that accepts information (in the form of digitalized) and manipulates it for some result based on a program, software, or sequence of instructions on how the data is to be processed.


Some examples of Computers

  • Calculator
  • Smartphone
  • Laptop
  • Desktop computer and more

What Is Using Windows All About?

Created and sold by a company called Microsoft, Windows isn’t like your usual software that lets you calculate income taxes or send angry e‐mails to politicians. No, Windows is an operating system, meaning it controls the way you work with your computer. It’s been around for 30 years, and the latest incarnation is called Windows 10.

The name Windows comes from all the little windows it places on your computer screen. Each window shows information, such as a picture, a program, or a baffling technical reprimand. You can place several windows onscreen simultaneously and jump from window to window, visiting different programs. Or, you can enlarge one window to fill the entire screen.

When you turn on your computer, Windows jumps onto the screen and begins supervising any running programs. When everything goes well, you don’t really notice Windows; you simply see your programs or your work. When things don’t go well, though, Windows often leaves you scratching your head over a perplexing error message.

In addition to controlling your computer and bossing around your programs, Windows comes with a bunch of free programs and apps — mini‐programs. These programs and apps let you do different things, such as write and print letters, browse the Internet, play music, and send your friends dimly lit photos of your latest meal.


Below are some of the Versions of Windows though they are more than this.

  • Windows XP
  • Windows 7
  • Windows 8
  • Windows 10

Parts of a Computer

These parts of the Computer and some other devices are connected together with the help of wires and cables.

The basic parts of a computer system are:

  1. Monitor
  2. CPU (Central Processing Unit)
  3. Keyboard
  4. Mouse
  5. Speakers
  6. Printer

Let us look into these computer parts in more details



The keyboard is used for entering data into the computer system. It can type words, numbers and symbols.  More information of computer keyboard.


The mouse is a pointing device. You can give input to the computer with the help of the mouse. More information of computer mouse


A microphone is the mike that can be attached to a computer. It allows you to input sounds like speech and songs into the computer. You can record your voice with the help of a microphone.

The processing device in a computer is known as Central Processing Unit (CPU).

Monitor: A monitor looks like a TV screen. It shows whatever you type on the keyboard or draw with the mouse.