Trackballs are similar to the basic computer mouse. The trackball is a device for pointing and consists of a ball, held in place by a socket that contains a sensor.
How to use a Trackball
Roll the ball using your thumb, finger or the palm of your hand to position the pointer on your screen. You can use your fingertips to press the buttons on the mouse.
Benefits of using a Trackball
Less arm and wrist movement
Less workspace needed
Minimal cleaning needed
Some can be programmed for a specific user
Common places where you may use a trackball are on CAD workstations for easy precision, from air-traffic controlling to operating equipment to drafting and design work.