Introduction.- VIRTUAL ENVIRONMENTS: A Review - John Vince. The Role of Virtual Humans in Virtual. Environment Technology and Interfaces - Daniel Thalmann. Perceptual User Interfaces - Matthew Turk. Guidelines for Telepresence and Shared Virtual Environments - Rae Earnshaw.- AUGMENTED REALITY AND MOBILE COMPUTING: Mobile Augmented Reality as an Example of a Complex and Demanding Human-Centred System - Simon Julier, Steven Feiner and Larry Rosenblum. Toward Tightly-Coupled Human Interfaces - Thomas Furness. Situation-Aware Mobile Assistance - Thomas Kirste.- DEVICES FOR DISPLAY AND INTERACTION: Devices for Display and Interaction - Turner Wittted. Technologies for Virtual Reality/Tele-Immersion Applications: Issues of Research in Image Display and Global Networking - Tom DeFanti, Dan Sandin, Maxine Brown, Dave Pape, Josephine Anstey, Mike Bogucki et al.- FUTURE INTERFACES: Post-Wimp User Interfaces: The Human Connection - Andries van Dam. Supporting Creativity with Advanced Information-Abundant User Interfaces - Ben Shneiderman. Virtual Spaces Revive Real World Interaction - Luc Julia, Jehan Bing and Adam Cheyer. An HCI Agenda for the Next Millennium: Emergent Global Intelligence - John Thomas.- APPLICATIONS AND TOOLS: The Impossible 'Killer App': Catalyst for Change - David Arnold. 3D Data Visualization Components on the Web - Results from AVS'involvement in several EC ESPRIT Research Projects - Mikael Jern. Creating a Shared Reality for Research and Education through Networked Virtual Reality - Judith Brown.- ONLINE COMMUNITIES: Usability, Sociability, Theory and Methods - Jenny Preece. Collaboration and Shared Virtual Environments - From Metaphor to Reality - David Leevers. On the Need for Cultural Representation in Interactive Systems - Sudhir Mudur. Internet Security from Diverse Viewpoints - Christoph Busch.- FOUNDATIONS FOR INTERACTION: Why Performance Always Comes Last in Interactive Systems Design and What to do about it - William Newman. Virtual Environments for Human-Centred Computing - Tosiyasu Kunii. Some Aspects of the Human Communication Process: Preliminary Steps Towards a Conceptual Framework - Richard Guedj. Society and Human Action: Technology Revisited - Veronique Havelange. Natural Human-Human-System Interaction - Neils Ole Bernsen.- BUSINESS/ACADEMIC/RESEARCH/GOVERNMENT: Challenges and Frontiers of Computer Graphics - A Vision for an Applied Research Agenda - Jos Encarnao. Business, Academia, Government: Toward Symbiotic Collaboration in a Networked Society - Kozo Akiyoshi, Nobuo Akiyoshi, Tosiyasu Kunii and Sakaki Morishita. A Research Agenda for Visualization and Human Interfaces: A Position Paper - Chuck Koelbel. Publishing Technologies: Towards a Wider Concepts of Documents and Related Issues - Jurgen Schoenhut. The Future and its Enemies - Bertram Herzog.- INVITED LECTURES: New Industrial Temporal Objects - Bernard Stiegler. Cognition and Computers: The Context of the Matter, the Matter of Context - Daniel Andler. Universal Usability: Pushing Interface Research to Address the Needs of Every Citizen - Ben Shneiderman.