http://www.macnn.com/articles/03/07/01/touchstar.for/
TouchSTAR for 20", 23" Cinema displays
updated 12:05 pm EDT, Tue July 1, 2003
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Troll Touch recently announced the immediate availability of its TouchSTAR touch-screen enhancement for Apple's HD Cinema flat panel displays. TouchSTAR enhancements are elegantly mounted internally so that the only modification visible to the user is the short USB cable that exits the back and plugs into one of the USB ports. The TouchSTAR enables users to interact with the computers GUI by touching anywhere on the display, via 4096 x 4096 points of touch).
