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    				| 1. | 
                                    What is a trackball? How does it differ from Mouse and joystick? | 
                            
| Answer» Difference between Trackball and Mouse is that trackball is a stationary pointing device with a ball on its top or side. To move the pointer using atrack ball, you rotate the ball with your thumb, fingers, or the palm of your hand. ... With a mouse, users control the movement of the pointer. | |