what are pointing device ?explain any two?
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A pointing device is a type of input devices that allows a user to interact with a computer by moving a cursor on a monitor to select icons and trigger desired actions. The de facto pointing device for desktop computers is a mouse, which was invented by Douglas England in 1967 .
Example:1) A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes.
2) A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube display. It allow
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