Chapter 1 - INTRODUCTION TO COMPUTERS

COMPUTER SCIENCE

Chapter 1 : Introduction to Computers

Class : III

Session : 1

OBJECTIVES

❑ COMPUTER AND ITS DIFFERENT PARTS
❑ ABOUT HARDWARE
❑ ABOUT SOFTWARE

C- COMMON
O- O P E R AT I N G
M- MACHINE
P- P U R P O S E LY
U- USED FOR
T- TECHNOLOGICAL and
E- E D U C AT I O N A L
R- RESEARCH

DEFINITION

❖ Computer is defined as an
Electronic machine.

❖ The computer gets data as an
input, works on the data and
gives the information as
output.

DIFFERENT PARTS OF A
COMPUTER

Computer consists of two major
elements. They are

1.Hardware
2.Software
Hardware:

Computer hardware refers to the

parts of a computer that you can

touch and feel.(E.g.) Keyboard.

EXAMPLES OF HARDWARE:

CATEGORIES OF HARDWARE

1. Input Devices:
⮚ The input devices are used to give input to the

computer.
⮚ Example : keyboard

2.Processing Devices:
⮚ Processing devices are used to process the

input data.
⮚ Example : CPU(Central Processing Unit)

INTERNAL VIEW OF CPU BOX

3. Output devices:
➢ The output devices are used to show the result.
⮚ Example : Monitor

REAL TIME EXAMPLE

SOFTWARE

⮚ Computer software is a set of program
(instructions) for a computer to perform specific
work.

➢ Example : Games , WINDOWS OS , MS WORD

Difference between

HARDWARE SOFTWARE

• All the electronic and • Set of programs that tell a
mechanical parts of a computer what to do.
computer system.

Headphone is an output device.

TRUE FALSE

WINDOWS is an example of ______

a) HARDWARE b) SOFTWARE

Given pictures are example of _____

a) INPUT DEVICES b)OUTPUT DEVICES

RECAP

1.Computer
2.Computer system
3.Parts of a computer system
4.Hardware
5.Categories of hardware