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Printer

A printer is used to print the result of the work done by the computer on paper.
We can print documents, drawings, images, etc., in black & white as well as in
colour using a printer.
Printer

Factbot

The result we get on the monitor screen is called soft copy and the result we get on paper is called hard copy.

Speakers

Speakers are used to hear music, voice and sound on a computer.

Multimedia Projector
Speakers
A multimedia projector projects or displays data of computer screen on a large
screen or surface for audience. The image shown by the projector is larger in size

Multimedia Projector than shown on the monitor.

HOW COMPUTER WORKS?

A computer works on the IPO cycle (Input-Process-Output).

Input: The data and instructions we give to a computer are called Input.

Process: A computer takes action on the data entered by the user. It converts the data into meaningful
information with the help of the processor which is the CPU. This conversion of data into information
is called processing.

Output: The result which we get after processing the data and instructions is called output.
For example,

5, 10, add 5 + 10 15

INPUT PROCESS OUTPUT
Given through an input device Done by the processing device Displayed on the output device

IPO Devices

A computer uses its input devices (such as keyboard
and mouse), processing device (CPU) and output Memory Unit
devices (such as monitor and printer) to follow each
stage of the IPO cycle. Control Unit

Input Device

A computer accepts data and instructions from you ALU
through input devices. Data can be in the form of
numbers, text, sound or graphics. CPU box /cabinet CPU Functioning of CPU

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