Cooperative Information Agents IV The Future of Information Agents in Cyberspace : 4th International Workshop CIA 2000 Boston MA USA July 7 9 2000. Proceedings This book constitutes the refereed proceedings of the 4th International Workshop on Cooperative Information Agents CIA 2000 held in Boston MA USA in July 2000 in association with ICMAS 2000. The 15 revised full papers presented together with seven invited contributions were carefully reviewed and selected from 44 submissions. The book is divided into sections on personal information agents on the Internet agent based information gathering and mediation rational information agents for e commerce societies of information agents communication and collaboration and future inspirations and design