Opening Keynote -- Groups, Group Cognition and Groupware -- Groupware Development -- A Framework for Prototyping Collaborative Virtual Environments -- Adaptive Distribution Support for Co-authored Documents on the Web -- Agilo: A Highly Flexible Groupware Framework -- Autonomous and Self-sufficient Groups: Ad Hoc Collaborative Environments -- Empowering End-Users: A Pattern-Centered Groupware Development Process -- Integrating Synchronous and Asynchronous Interactions in Groupware Applications -- Collaborative Applications -- An Architectural Model for Component Groupware -- An Architecture for Collaborative Geomodeling -- Remote Control Point Motion Prediction in Internet-Based Real-Time Collaborative Graphics Editing Systems -- Synchronization Contexts as a Means to Support Collaborative Modeling -- Tailoring Infrastructures: Supporting Cooperative Work with Configurable Email Filters -- Workflow Management -- A Collaborative Framework for Unexpected Exception Handling -- A Workflow Mining Method Through Model Rewriting -- Design of an Object-Oriented Workflow Management System with Reusable and Fine-Grained Components -- Modeling the Behavior of Dispatching Rules in Workflow Systems: A Statistical Approach -- Knowledge Management -- Collective Knowledge Recall: Benefits and Drawbacks -- Developing Shared Context Within Group Stories -- Patterns of Collaboration and Non-collaboration Among Physicians -- Shared Knowledge: The Result of Negotiation in Non-hierarchical Environments -- Computer Supported Collaborative Learning -- A Mediation Model for Large Group Collaborative Teaching -- Analyzing the Organization of Collaborative Math Problem-Solving in Online Chats Using Statistics and Conversation Analysis -- Collaboration for Learning Language Skills -- Group Decision Support Systems -- Collaborative IS Decision-Making: Analyzing Decision Process Characteristics and Technology Support -- Software Requirements Negotiation Using the Software Quality Function Deployment -- The Design and Field Evaluation of a Repeatable Collaborative Software Code Inspection Process -- Mobile Collaborative Work -- Handheld-Based Electronic Meeting Support -- Sharing Information Resources in Mobile Ad-hoc Networks -- Work Modeling in CSCW -- Towards a Model of Cooperation -- Towards an Ontology for Context Representation in Groupware.