What are different Input Devices in Computer?

Input System 

An input device is a peripheral or piece of computer hardware equipment, which is used for providing data and controlling signals to an information processing system (Computer).

TYPES OF INPUT DEVICES 

1. Keyboard: It is human interface device, which is represented as a layout of buttons. Each button or key could be used to input linguistic character to a computer for particular functions. 

2. Pointing Devices (Mouse & Trackball): These are any human interface devices that allow users to input spatial data to a computer. Eg: mouse, trackball, Glidepad

3. Game Devices: The motion of cursor is controlled by joystick or arrow buttons (Game Pad)

4. Pen Input: It is especially used in Personal Digital Assistant (PDA). It is used for Data input, Pointing Device, and Command Gesture etc.

5. Touch Screen: The touchscreen enables the selection by just touching the screen.

6. Digitizers and Graphic Tablet: The Tablets have Special Command for the conversion of drawing and photos.

7. Page Scanner: It works like copy machine and captures whole image for converting to the digital image.

8. Hand Scanner: It can move across document or picture. It can capture only a section of a page or a large image.

9. Bar Codes: It is used at the retail shops to track inventory and calculate the sale at the checkout counter.

10. Optical Character: It uses letters or special characters that are especially shaped t be easy for the machines to read.