Section 1. Artifacts and their Development 1. The Birth of an Organizational Resource: The Surprising Life of a Cheat Sheet. Christine Halverson and Mark Ackerman 2.The Zephyr Help Instance as a CSCW Resource. Mark Ackerman and Leysia Palen 3. Co-realisation: Towards a Principled Synthesis of Ethnomethodology and Participatory Design. Mark Hartswood, Rob Procter, Roger Slack, Alex Voss, Monika Buscher, Mark Rouncefiled, Philippe Rouchy 4. Figuring Out How to Figure Out: Supporting Expertise Sharing in Online Systems. Thomas Erickson, Christine Halverson, Wendy Kellogg Section 2 - Contextualizing Influences: Language, Trust and Time 5. Representational Gestures as Cognitive Artifacts for Developing Theories in a Scientific Laboratory. L. Amaya Becvar, James Hollan, Edwin Hutchins 6. Distributed Cognition and Joint activity in Computer-System Administration. Paul Maglio, Eser Kandogan, Eben Haber 7. Representation, Coordination, and Information Artifacts in Medical Work. Madhu Reddy and Paul Dourish Section 3 - Theorizing: Coordination, Co-realization and Structuration 8. Reach, Bracket, and the Limits of Rationalized Coordination: Some Challenges for CSCW. Elihu Gerson 9. Down in the (Data)base(ment): Supporting Configuration in Organisational Information Systems. Stuart Anderson, Gillian Hardstone, Rob Procter, Robin Williams 10. Using Technology and Constituting Structures: A Practice Lens for Studying Technology in Organisations. Wanda Orlikowski 11. Reflections andConclusions.