trackball
Sign in to savethumb|Logitech Cordless TrackMan Wheel trackball mouse thumb|250px|The original version of the Kensington Computer Products Group|Kensington Expert Mouse can use a US-size billiard ball as a trackball.
Article
8 sectionsContents
- History
- Special applications
- Ergonomics
- Mobile devices
- On mice
- See also
- References
- External links
thumb|Logitech Cordless TrackMan Wheel trackball mouse thumb|250px|The original version of the Kensington Computer Products Group|Kensington Expert Mouse can use a US-size billiard ball as a trackball.
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 ball mouse with an exposed protruding ball. Users roll the ball to position the on-screen pointer, using their thumb, fingers, or the palm of the hand, while using the fingertips to press the buttons.