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Light Pen

               Light pen is input device that utilizes a light-sensitive detector to select objects
               on a display screen. A light pen is similar to a mouse, except that with a light pen
               you can move the pointer and select objects on the display screen by directly
               pointing to the objects with the pen.












                                                          Light Pen
                          Function: It is used to select objects on a display screen.

               Stylus

               Stylus pens are devices designed for use with touch resistive and capacitive
               screens.











                                                     Examples of Stylus

                          Function: These pens allow users to "write" on the touch screen much
                          as they would a pad of paper, allowing input of handwriting, drawings
                          and other gestures.

               Joystick

               Mostly used for computer games, a joystick is lever that moves in all directions
               and usually controls some type of movement on the computer. It consists of a
               stick on a base with various buttons that have different functions.
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