Trackball

Features	Uses	Advantages	Disadvantages
-It is similar to mouse but the ball is on the top -It has buttons for selection and opening menus -Ball is used to control pointer	-opening, closing, deleting, maximizing, minimizing and moving files -controlling pointer -editing images	-people with wrist pain problem can still use it -More accurate than mice -Does not need flat surface -No limits on ball move	-More difficult to learn it’s use