involves writing RS232 drivers for several interaction devices and developing software that uses
     them in an augmented reality application. The user wears a see-through head-mounted display,
     which will present graphical instructions that explain how to assemble the structural support
     system for a building. The instructions are overlaid on the user's view of the actual physical parts
     being assembled. The drivers will be written as application threads that read the serial ports of
     UNIX and Windows NT machines. Devices to be supported include: 
         Dynasight: A 3D optical radar position/orientation tracker. 
         The Cricket: A hand-held device with a 3D position/orientation tracker. 
         Ringmouse: A finger-worn ultrasonic 3D position tracker.