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Practical No 2

The document provides an overview of input and output devices in computers, defining input devices as hardware used to enter data and output devices as hardware that displays processed results. It lists common input devices such as keyboards, mice, and scanners, along with their functions, and mentions output devices like monitors and printers. The document serves as a foundational guide for understanding these essential components of information and communication technology.

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24 views4 pages

Practical No 2

The document provides an overview of input and output devices in computers, defining input devices as hardware used to enter data and output devices as hardware that displays processed results. It lists common input devices such as keyboards, mice, and scanners, along with their functions, and mentions output devices like monitors and printers. The document serves as a foundational guide for understanding these essential components of information and communication technology.

Uploaded by

technovision22co
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Fundamental of ICT

Chapter No – 1
Input and output devices

Input Device Definition: A piece of equipment/hardware which helps us enter data into a
computer is called an input device. For example keyboard, mouse, etc.

Output Device Definition: A piece of equipment/hardware which gives out the result of the
entered input, once it is processed (i.e. converts data from machine language to a human-
understandable language), is called an output device. For example printer, monitor, etc.

List of Input Devices


1. Keyboard
2. Mouse
3. Scanner
4. Joystick
5. Web Camera
6. Digitizer
7. Lightpen

Department of Computer Engineering Page 1


Fundamental of ICT

8. Output Devices
A. Monitor
B. Printer
C. Projector

Department of Computer Engineering Page 2


Fundamental of ICT

Given below is the list of the most common input devices along with brief information about each
of them.

1. Keyboard

 A simple device comprising keys and each key denotes either an alphabet, number or number
commands which can be given to a computer for various actions to be performed
 It has a modified version of typewriter keys
 The keyboard is an essential input device and computer and laptops both use keyboards to give
commands to the computer

2. Mouse

 It is also known as a pointing device


 Using mouse we can directly click on the various icons present on the system and open up various
files and programs
 A mouse comprises 3 buttons on the top and one trackball at the bottom which helps in selecting and
moving the mouse around, respectively
 In case of laptops, the touchpad is given as a replacement of the mouse which helps in the movement
of the mouse pointer

3. Joy Stick

 It is a device which comprises a stick which is attached at an angle to the base so that it can be moved
and controlled
 Mostly used to control the movement in video games
 Apart from a computer system, a joystick is also used in the cockpit of an aeroplane, wheelchairs,
cranes, trucks, etc. to operate them well

4. Light Pen

 It is a wand-like looking device which can directly be moved over the device’s screen
 It is light-sensitive
 Used in conjunction with computer’s cathode ray tube

5. Microphone

 Using a microphone, sound can be stored in a device in its digital form


 It converts sound into an electrical signal
 To record or reproduce a sound created using a microphone, it needs to be connected with an
amplifier
Department of Computer Engineering Page 3
Fundamental of ICT

6. Scanner

 This device can scan images or text and convert it into a digital signal
 When we place any piece of a document on a scanner, it converts it into a digital signal and displays it
on the computer screen

7. Barcode Reader

 It is a kind of an optical scanner


 It can read bar codes
 A source of light is passed through a bar code, and its aspects and details are displayed on the screen

Department of Computer Engineering Page 4

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