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Joystick
Joystick is a pointing device which is used to control the movement
of a pointer on your computer screen. It is mostly used to play
games on the computer.
Microphone Joystick
It 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, sometimes called a Memory Unit
microprocessor. It is the brain
of the computer that does all the
Control Unit
calculations, and runs all the programs.
It manages all the operations and
carries out the basic instructions ALU
which operate a computer. The three
CPU box CPU Functioning of CPU
main components of CPU are:
ALU (Arithmetic Logic Unit): Performs mathematical and logical operations.
CU (Control Unit): Directs all the operations of a processor.
Memory Unit: Stores data and instructions.
The Computer— An Overview 9

