The present invention provides a highly scalable architecture for a three-dimensional graphical, multi-user, interactive virtual world system. A plurality of users can interact in the three-dimensional, computer-generated graphical space where each user executes a client process to view a virtual world...http://www.google.com/patents/US6219045?utm_source=gb-gplus-sharePatent US6219045 - Scalable virtual world chat client-server system
