INPUT DEVICE
INPUT DEVICES An input device is an electromechanical device that accepts data from outside world and translates them into a form a computer can interpret. Several input devices are available today. we classify them broadlly into following categories: 1. Keyboard 2. Point-and-draw devices 3.Data scanning devices 4. Digitizer 5. Electronic cards based devices 6.Speech recognition devices 7. Vision based devices 1. Keyboard Keyboard device are the most commonly used input device today. They allow data entry into a computer system by pressing a set of keys(labeled buttons) neatly mounted on a keyboard connected to a computer system. The most popular keyboard used today is the 101 -keys QWERTY keyboard. 2. Point-and-Draw-Devices The point and draw device is an input system that helps to point and select an icon to be shown on the screen quickly . Some of the most common point and draw devices are. Trackball, Mouse, Joystick, Expl