1.3.2 Keyboard, Mouse and VDU

To solve a problem it is necessary to give data and instructions to the Computer. This can be done through input device. The keyboard is an example of an input device that accepts data and translates it into electronic signals. Both program (instructions) and data can be keyed in through it. In addition, certain commands to software can be given from the keyboard.

Keyboard

keyboardTo solve a problem it is necessary to give data and instructions to the Computer. This can be done through input device. The keyboard is an example of an input device that accepts data and translates it into electronic signals. Both program (instructions) and data can be keyed in through it. In addition, certain commands to software can be given from the keyboard.

Mouse

mouse Mouse is a pointing device which can be moved on a smooth surface to simulate the movement of cursor that is desired on the display screen. Mouse could be o ptical; offering quite and reliable operation, or mechanical which is cheaper. User can move the mouse; stop it at a point where the pointer is to be located and, with the help of buttons, and make selection of choices. The mouse is not an alternative to t he keyboard for entering data. Text and numbers still have to be keyed in, but selection from menus and drawings are easier with a mouse. There are 2 keys, 3 keys and scrolling facilities available in mouse.

VDU

VDUA VDU is a Visual Display Unit. It is another term for monitor or screen, but may also refer to a projector or other type of display. VDUs may be peripheral devices or may be integrated into a computer system. While early VDUs were mainly CRT displays, today most monitors are flat panel displays that use LCD or LED technology.