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Chapter Profile
Chapter Profile
1 Hardware
Software
How does a Computer Work?
A Computer
System
A computer is an electronic machine. It is made up of various devices like keyboard, mouse,
monitor and CPU. These devices help you to enter the data (input) through keyboard or
mouse, process the data using CPU and display the results (output) on the monitor or
printer.
HARDWARE
All the physical components of a computer system are called hardware. These are the
parts which we can see or touch. Hardware devices are further classified as shown:
Hardware
Input Processing Output Storage
devices device devices devices
Input Devices
A computer accepts data and instructions through input devices. Some of the input devices
are keyboard, mouse, scanner, joystick, microphone, etc.
Keyboard
A keyboard is used to enter words, numbers and special
characters.
Mouse
A mouse is a pointing device that inputs data by pointing, clicking and
dragging.
A Computer System 7

