Question

short note on track ball​

Answer 1

Answer:

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—like an upside-down mouse with an exposed protruding ball

Answer 2

Track ball is similar to a mouse and can be used in its place. It has a ball on its top. You roll the ball with your fingers to move the pointer on the screen.