Input Devices

An input device is device which sends data to the computer. There are different types of input devices such as keyboard, mouse, microphones, digital cameras, jotsticks, canners and more...

Different types of input devices: 1.Keyboard

Keyboard is the most common and very popular input device which helps in inputting data to the computer.The layout of the keyboard is like that of traditional typewriter, although there are some additional keys provided for performing additional functions.

2.Mouse

Mouse is most popular pointing device.

Advantages 3.Joystick
 * Easy to use
 * Not very expensive
 * Moves the cursor faster than the arrow keys of keyboard

Joystick is also a pointing device which is used to move cursor position on a monitor screen. The function of joystick is similar to that of a mouse. It is mainly used in Computer Aided Designing(CAD) and playing computer games.

4. Scanner

Scanner is an input device which works more like a photocopy machine.Scanner captures images from the source which are then converted into the digital form that can be stored on the disc. These images can be edited before they are printed.

5.Digital camera

A digital camera takes pictures and can usually record video too. The pictures it takes and the videos it records are stored in files. These files can be copied to a computer and later edited.

6.Graphic Tablet

A graphics tablet consists of a flat pad (the tablet) on which the user draws with a special pen. As the user draws on the pad the image is created on the screen. Using a graphics tablet a designer can produce very accurate on-screen drawings as if they were drawing on paper.

7.Microphone

Microphones are used to input sound. In computing they can be used with voice recognition software and a word processing application to enter text.

8.Bar code Reader

Bar Code Reader is a device used for reading bar coded data (data in form of light and dark lines). Bar coded data is generally used in labelling goods, numbering the books etc.

9.Optical Mark Reader (OMR)

OMR is a special type of optical scanner used to recognize the type of mark made by pen or pencil.It is specially used for checking the answer sheets of examinations having multiple choice questions.

10.Optical Character Reader (OCR)

OCR is an input device used to read a printed text. OCR scans text optically character by character, converts them into a machine readable code and stores the text on the system memory.

by KIM YEJIN