Abstract
When the targets of an argument are mixed, as a product model in computer made with CAD and that's prototype, there are often difficult situations to understand what object is pointed and disucussed. Then, in our study, we aim at the development of the system which an opinion of a participant in an argument is positively reflected by making the target clear using three demension pointing device. We called this system "Universal Pointing System (UPS)". UPS is capable of pointing the object regardless of entities or representations using three demension pointing devices. Furthermore it is possible to add easily devices and applications because the entire system is going to be designed with the client-server model.
