Most common pointing device - used to move a pointer around the screen and select options by clicking.
Connected to computer via a cable or wirelessly
Two types of mouse - Mechanical OR Optical
Mechanical mouse - rolling ball and the computer senses its position on a flat surface. (Work best on a mouse mat)
Optical mouse - uses a light sensor to detect motion and does not need a mouse mat.
Both types of mouse - two or three buttons can be clicked and have a scroll wheel to make dragging and scrolling easier.
Trackball - same job as a mouse (has a ball on the surface)
Ball is rolled unsing fingers or the palm of hand. Used sometimes with laptop computers because they are easier in confined spaces.
Laptops have trackpads, user moves finger over sensitive plate controlling cursor.
Trackpoint (small button) that works like a joystick and sometimes seen on mobile phones, PDA's and laptops.
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