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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 on the
computer monitor. 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.
Joystick
A joystick is used to play games on a computer. It helps to control
the different movements in the game.
Touchscreen
A touchscreen is used to enter data by simply touching the screen.
While using a touchscreen, a finger acts as a pointing device and
the object on the screen is selected using a finger. The result is also
shown on the screen. So, it is both an input device and an output
device.
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