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COMPUTER SYSTEM
A computer system is made up of many parts. Each part of
the computer performs a different task. The computer system
is made up of two types of parts—Hardware and Software. The
parts of a computer that we use to work with the computer are
called devices.
COMPUTER HARDWARE
The parts of a computer that we can see and touch are called Hardware. All input, processing,
output and storage devices form the hardware components of a computer system. For example,
keyboard, mouse, etc.
The hardware components are divided into four groups.
Hardware
Processing Output Storage
Input Devices
Device Devices Devices
Input Devices
The devices that are used to enter data into the computer and give orders are called input devices.
Let us study about some of the commonly used input devices.
Keyboard
A keyboard is used to give input to the computer by typing
numbers, letters and special characters.
Mouse
A mouse is used to send instructions to the computer with the click of a
button. It is also used to draw pictures and select objects in the computer.
It is also called a pointing device.
Scanner
A scanner is used to read paper documents, images or pictures and send
them as input into the computer.
Computer System Organization - I/O devices, Storage devices 37

