I Introduction to Online Studies and Usenet.- 1 Studying Social Information Spaces.- 1.1 Social Spaces: Online and Offline Conversations.- 1.2 Asynchronous Online Social Information Spaces.- 1.3 Important Attributes of Spaces.- 1.4 Conclusion.- Acknowledgements.- References.- 2 “A Standing Wave in the Web of Our Communications”: Usenet and the Socio-Technical Construction of Cyberspace Values.- 2.1 Introduction.- 2.2 Usenet Origins.- 2.3 The Poor Man’s ARPANET.- 2.4 “Usenet Is Dying”.- 2.5 The “Backbone Cabal”.- 2.6 The “Great Renaming”.- 2.7 “Usenet Is Not a Democracy”.- 2.8 A Democratic Network.- 2.9 Rise of the Cancelbots.- 2.10 The Scientology War.- 2.11 “The First Internet War”.- 2.12 “Usenet Cannot Be Regulated”.- 2.13 The Breidbart Index.- 2.14 Conclusion: Assessing Usenet.- References.- II Studying Spaces.- 3 Measures and Maps of Usenet.- 3.1 Introduction.- 3.2 Usenet Has Many Dimensions and Can Be Seen at Multiple Scales.- 3.3 Web Interfaces for Social Cyberspaces.- 3.4 Network Analysis of Usenet Cross-posting Patterns.- 3.5 Conclusion: The Benefits of Awareness of Social Context and History.- Acknowledgements.- References.- 4 The Dynamics of Mass Interaction.- 4.1 Introduction.- 4.2 Usenet Organization, Distribution, and Interaction.- 4.3 Data Collection and Sampling.- 4.4 Descriptive Results.- 4.5 Testing the Common Ground Model.- 4.6 Conclusions.- Acknowledgements.- References.- 5 Conversation Map: A Content-based Usenet Newsgroup Browser.- 5.1 Introduction.- 5.2 The Graphical Interface.- 5.3 The Text Analysis Procedure.- 5.4 Related Work.- 5.5 Conclusions.- References.- 6 Silent Participants: Getting to Know Lurkers Better.- 6.1 Introduction.- 6.2 Rethinking Lurking.- 6.3 Lurkers in Discussion Lists.- 6.4 Interviews and Initial Discoveries.- 6.5 Why Lurkers Lurk.- 6.6 What Lurkers Do.- 6.7 Lurkers as Participants.- 6.8 Lurkers with a Sense of Community.- 6.9 Summary.- References.- III Enhancing Spaces.- 7 Computer Mediated Communication Among Teams: What are “Teams” and How are They “Virtual”?.- 7.1 Introduction.- 7.2 Small-group Research: History and Definitions.- 7.3 Cohesion in Groups.- 7.4 Computer-mediated Communication and Virtual Teams.- 7.5 Summary.- References.- 8 Co Web — Experiences with Collaborative Web Spaces.- 8.1 Introduction.- 8.2 History of the Swiki and the Co Web.- 8.3 Content Creation on the Co Web.- 8.4 Typical Uses of Co Webs.- 8.5 Emerging Roles in CoWebs.- 8.6 The Future of the Co Web.- 8.7 Summary.- References.- 9 From PHOAKS to TopicShop: Experiments in Social Data Mining.- 9.1 Introduction.- 9.2 Previous and Related Work.- 9.3 PHOAKS.- 9.4 TopicShop.- 9.5 Research Question I: Can We Predict Human Quality Judgements?.- 9.6 Research Question II: Can We Improve User Task Performance?.- 9.7 Future Work.- 9.8 Summary.- References.- 10 GroupLens for Usenet: Experiences in Applying Collaborative Filtering to a Social Information System.- 10.1 Introduction.- 10.2 The Evolution of Usenet.- 10.3 Filtering on Usenet.- 10.4 GroupLens Architecture.- 10.5 User Behaviour.- 10.6 Experimental Design.- 10.7 Algorithmic Performance.- 10.8 What Did We Learn? Where Has the Research Gone?.- 10.9 Conclusion.- References.- 11 Exploring Interaction and Participation to Support Information Seeking in a Social Information Space.- 11.1 Introduction.- 11.2 A Situated Perspective on Information Seeking.- 11.3 Related Work on Information-seeking Support.- 11.4 Specific Characteristics of Usenet.- 11.5 Exploring Situated Aspects of Information Seeking in Usenet Newsgroups.- 11.6 Summary and Conclusions.- Acknowledgements.- References.- Appendix: Studying Online Newsgroups.- A.1 Introduction.- A.2 Posting to Usenet.- A.3 Usenet Propagation.- A.4 The Birth and Death of Newsgroups.- A.5 How Messages Look.- A.6 How Usenet Is Accessed.- A.7 Invisible Layers of Usenet.- A.8 Dealing with Usenet Data.- A.9 Conclusion.