These proceedings contain a collection of papers that encompass activities in the field. These include papers addressing new interaction technologies for CSCW systems, new models and architectures for groupware systems, studies of communication and coordination among mobile actors, studies of groupware systems in use in real-world settings, and theories and techniques to support the development of cooperative applications. The papers present emerging technologies alongside new methods and approaches to the development of this important class of applications. The work in this volume represents the best of the current research and practice within CSCW. The collection of papers presented here will appeal to both researchers and practitioners alike as they combine an understanding of the nature of work with the possibilities offered by new technologies.