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THE COMPUTER— AN OVERVIEW
01
Your Aim
to learn about:
l Working of a Computer l Input Devices
l Processing Device l Output Devices
As you know that a computer system is made up of two types of parts— Hardware
and Software.
The parts of a computer that we can see and touch are called Hardware.
A computer needs instructions to do anything. The instructions and programs
that enable a computer to perform tasks are called Software.
WORKING OF A COMPUTER
A computer works on the IPO (Input-Process-Output) cycle. It receives input from
the user through input devices, processes the input using the CPU and gives back
the output using output devices. This process is known as IPO cycle.
Input devices Processing device Output devices
IPO Cycle
INPUT DEVICES
Input devices allow a computer to receive data and instructions from the user. Data
can be in the form of numbers, text, sound or graphics.
The Computer— An Overview 7

