There are currently 2 styles of mouse that are used on modern PC’s they are:
· A mechanical mouse, which uses a ball on the bottom of the mouse, which is in contact with the surface the mouse, is used on. The movement of the ball determines how the mouse cursor moves on the screen
· An optical mouse, which uses a light, which reflects down and back off the surface the mouse, is being used on. This is converted to an electrical pulse and determines how far the cursor moves on screen.