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Chapter Profile
Chapter Profile
Joystick
A joystick is a pointing device used to control the movement of a
pointer on your computer screen. It is mostly used to play games on the
computer.
Joystick
Microphone
A microphone is an input device that is used to record voice, music and
sound into the computer system.
Microphone
Touchscreen
A touchscreen is a screen sensitive to touch. We can interact with
a computer by touching areas on the screen. Tablets, smartphones,
ATMs have touchscreen in them.
Touchscreen
PROCESSING DEVICE
Processing is done on the data entered into the computer, to convert it into meaningful
information through a processor.
CPU
CPU (Central Processing Unit) is a processor, Memory Unit
sometimes called a microprocessor. It is
the brain of the computer that does all the
calculations, and runs all the programs. Control Unit
It manages all the operations and carries
out the basic instructions which operate a ALU
computer. The three main components of
CPU are: CPU box CPU Functioning of CPU
ALU (Arithmetic Logic Unit): Performs mathematical and logical operations.
CU (Control Unit): Directs all the operations of a processor.
MU (Memory Unit): Stores data and instructions.
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The Computer—An Overview 9 9

