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Input device
Output device
Input-Output device
Storage device



Input Device : Any hardware component that allows users to enter data and instructions into a computer.

INPUT DEVICE
 DEFINITION (D) and FUNCTION (F)
KEYBOARD


key
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D- an input device that contains keys users press to enter data & instructions into a computer.
F-used to enter  characters (letters,nyumbers and other symbols) at the location on the screen marked by the insertion point or cursor
POINTING DEVICE
mouse
 D-input device that allows a user to control a pointer on the screen.
F-used to move the insertion point,select text,graphics & other object & click buttons,icons & menu commands.
TOUCH SCREEN
touch
 D-a touch-sensitive display device
F-users can interact with touch screen by touching area of the screens
PEN INPUT
stylus
 D-an input device that is input by writing,drawing or tapping on the screen with a pen-like device called a stylus
F-users can touch a stylus or digital pen on a flat surface to write,draw or make selections
VOICE INPUT
mic
 D-an input device that putting spoken words and converting them to digital form
F-the process of entering any sound into the computer