tracker ball

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(hardware)

tracker ball - 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.

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No references found			Most modern PDAs feature a combination of input devices, including touch sensitive screens, tracker balls, and small QWERTY keyboards. The History of the Personal Digital Assistant by Neo Nashville / Biological sciences community Just like previous Blackberry phones, the 8900 holds a tracker ball that allows you to scroll through your emails, web sites and other areas of the phone with ease and in the long run proves very handy as a navigational tool. BlackBerry Curve 8900 by Tape4backup / Communications, general community The Nucleus3 radar system was launched in 2001 and offers a range of flexible operating modes, with features that include automatic tracking of up to 50 targets and the patented Kelvin Hughes tracker ball and push control. Kelvin Hughes and Nucleus3. (Digest) by Armada International			track hopper track in range Track Indicator Track Jack track lighting Track Machine Track Machine Station track made good track pitch Track Shifter track shoe Track Superstructure Track System track telling Track-assembly Machine track-at-once Track-dismantling Machine track-laying vehicle Track-Maintenance Machine track-return power system track-to-track access time track-while-scan TrackBack trackball tracker tracker ball tracker dog Tracking Tracking and Data Relay Satellite System tracking beam tracking cookie tracking cross tracking cursor tracking error tracking filter tracking jitter tracking network tracking problem tracking radar tracking station tracking system tracking telescope Tracklayer trackless mine Trackless Transport trackless tunneling trackpad TrackPoint Trackshifter trackstick TrackWrite			Tracked Aggression Tracked Air Cushion Vehicle Tracked Armored Fighting Vehicle Tracked Combat Vehicle tracked down tracked down tracked down tracked down tracked down Tracked Suspension System Tracked Transit System tracked up tracked up tracked up tracked up tracked up tracked vehicle tracked vehicle tracked vehicle Tracked Vehicle Maneuver Area Tracked Vehicle Maneuvering Area Tracked Vehicle SICPS Shelter Tracked vehicles Tracked vehicles tracker tracker tracker tracker tracker tracker tracker ball tracker balls tracker balls tracker balls tracker balls Tracker Bias Supply Tracker Boat Center tracker dog tracker dog tracker dog disease Tracker Extensible Markup Language tracker fund tracker fund Tracker Fund of Hong Kong Tracker Funds Tracker Funds Tracker Illuminator Console Tracker Illuminator Process Tracker Mortgage Tracker music Tracker music Tracker One-Man Control Tracker Thermal Backplane Trackers Trackers Trackhoe Trackhoe Trackhoe Trackhoe Trackhoes Trackhoes

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