Category : 1st Class
Devices which are used for entering data into a computer are called input devices. Some devices are used for both inputs as well as outputs are called input output devices.
The following are the common input devices:
Mouse is a pointing device that is used to control the movement of the cursor or pointer on a display screen. When mouse is rolled on a flat surface, the mouse pointer on the screen also moves in the corresponding direction. The movement of the mouse ball is translated into signals that tell the computer how and where to move the screen pointer.
Keyboard is a typewriter like input device. It allows you to passing your data or instruction into the computer.
Joystick is a control device that enables a user to move an object on the screen.
A scanner is a device that is similar to a Photocopier. The scanner copies pictures and photographs into the computer. Just as a photocopier prints the given printed image/page on a paper, a scanner creates an electronic form of the printed image which can then be manipulated, changed and modified according to the requirement.
Light Pen is a small pen shaped light sensitive wand. The light sensor senses the light emitted from a limited of view when it comes in front of a graphic element or object of the screen.
Bar code reader is an input device used for scanning the information which is printed in the form of barcode. It is widely used at the shops for scanning the price.
We can take pictures or create a video using a computer through a Web camera.
Microphone is used to record your voice into the computer.
Imagine!! Without using your keyboard can you type letters to your computer? Yes it is possible through a Touch screen. Next time you visit any bank with your parents, ask them to show the touch screen which is installed at the ATM counter.
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