tracker ball
<hardware> A pointing device consisting of a ball housed in a socket
containing sensors to detect rotation of the ball about two axes - like an
upside-down mouse. The user rolls the ball with his thumb or the palm of his
hand to move a cursor. Tracker balls are common on CAD workstations for ease of
use and on modern portable computers, where there may be no desk space on which
to use a mouse. Some clip onto the side of the keyboard and have integral
buttons which have the same function as mouse buttons.
(1996-08-04)
Nearby terms:
trace scheduling « track « track ball « tracker
ball
» tracking » trackpad » TrackPoint
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