Working of a Computer

There are thee basic operations of a computer. They are;

1. Input
2. Processing
3. Output

To get our tasks done, we use input devices, processing devices and output devices.

What are Input Devices?

Input devices allow te user to give the command to the computer. There are commonly used input devices. Some of them are Keyboard, Mouse, Joysticks, Light pen, trackball, Microphones and Scanners. Keyboard is the main input device of a computer.

Keyboard

The keyboard is the most popular input device of a computer. Without a keyboard we cannot type letters. There are many special keys of a computer keyboard.

Mouse

Mouse is a pointing device and an input device. There are two buttons of a mouse. They are the Left mouse button and the Right mouse button. Some mice have a scroll wheel.

Joy stick

A joystick is also a pointing device which is used to move an object on the computer screen. We can turn it to 360⁰.

Scanner

Scanner is used for scanning text; images etc. there are two types of scanners. They are;

1. Graphical scanners
2. Text scanners

Web cameras

Web cameras are used to see images from the computer and these days they are used for video conferencing over the internet.

Digital camera

These are used to take photos. We can connect digital cameras directly to a computer and we can get the photos from it to the computer.

Created By:

Imasha Parindi

Hilburn International College – Avissawella