Mouse

Computer mouse are in four types they are mechanical, optical, laser and trackball. Mechanical mouse are the o oldest one which has the ball to roll. It should require cleaning time to time. Dust particles can get stuck the ball we should clean by using the solution. Optical mouse and laser mouse are related to each other which does not have ball. It has a laser light instead of LED. Track ball mouse is the newest. It reduces the movement of the hand.
Connection for the mouse is in wire or wireless. Wire mouse are in 9-pin serial port, 25-pin serial port and game port.