Welcome to the 6th International Conference on Open Source Systems of the IFIP Working Group 2. 13. This year was the ?rst time this international conf- ence was held in North America. We had a large number of high-quality papers, highlyrelevantpanelsandworkshops,acontinuationofthepopulardoctoralc- sortium, and multiple distinguished invited speakers. The success of OSS 2010 was only possible because an Organizing Committee, a Program Committee, Workshop and Doctoral Committees, and authors of research manuscripts from over 25 countries contributed their time and interest to OSS 2010. In the spirit of the communities we study, you self-organized, volunteered, and contributed to this important research forum studying free, libre, open source software and systems. We thank you! Despite our modest success, we have room to improve and grow our conf- ence and community. At OSS 2010 we saw little or no participation from large portions of the world, including Latin America, Africa, China, and India. But opportunitiestoexpandarepossible. InJapan,weseeahotspotofparticipation led by Tetsuo Noda and his colleagues, both with full-paper submissions and a workshopon OpenSourcePolicyandPromotionofITIndustries inEastAsia. The location of OSS 2011 in Salvador, Brazil, will hopefully result in signi?cant participation from researchers in Brazil already a strong user of OSS and otherSouthAmericancountries. UndertheleadershipofMeganSquire,Publicity Chair, we recruited RegionalPublicity Co-chairscovering Japan (Tetsuo Noda), Africa(SulaymanSowe),the MiddleEastandSouthAsia(FaheenAhmed),R- sia and Eastern Europe (Alexey Khoroshilov), Western Europe (Yeliz Eseryel), UK and Ireland (Andrea Capiluppi), and the Nordic countries (Bj orn Lundell).

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Full Papers.- Spago4Q and the QEST nD Model: An Open Source Solution for Software Performance Measurement.- An Investigation of the Users' Perception of OSS Quality.- Engaging without Over-Powering: A Case Study of a FLOSS Project.- The Meso-level Structure of F/OSS Collaboration Network: Local Communities and Their Innovativeness.- To Patent or Not to Patent: A Pilot Experiment on Incentives to Copyright in a Sequential Innovation Setting.- Voting for Bugs in Firefox: A Voice for Mom and Dad?.- The Nagios Community: An Extended Quantitative Analysis.- Collaborative Development for the XO Laptop: CODEX 2.- Risks and Risk Mitigation in Open Source Software Adoption: Bridging the Gap between Literature and Practice.- Usability Innovations in OSS Development Examining User Innovations in an OSS Usability Discussion Forum.- Governance in Open Source Software Development Projects: A Comparative Multi-level Analysis.- Evaluating the Readiness of Proprietary Software for Open Source Development.- Where and When Can Open Source Thrive? Towards a Theory of Robust Performance.- How Open Are Local Government Documents in Sweden? A Case for Open Standards.- Bug Localization Using Revision Log Analysis and Open Bug Repository Text Categorization.- T-DOC: A Tool for the Automatic Generation of Testing Documentation for OSS Products.- Open Source Introducing Policy and Promotion of Regional Industries in Japan.- Comparing OpenBRR, QSOS, and OMM Assessment Models.- Joining and Socialization in Open Source Women's Groups: An Exploratory Study of KDE-Women.- Download Patterns and Releases in Open Source Software Projects: A Perfect Symbiosis?.- Modelling Failures Occurrences of Open Source Software with Reliability Growth.- A Field Study on the Barriers in the Assimilation ofOpen Source Server Software.- Reclassifying Success and Tragedy in FLOSS Projects.- Short Papers.- Three Strategies for Open Source Deployment: Substitution, Innovation, and Knowledge Reuse.- Coordination Implications of Software Coupling in Open Source Projects.- Industry Regulation through Open Source Software: A Strategic Ownership Proposal.- Proposal for Solving Incompatibility Problems between Open-Source and Proprietary Web Browsers.- FLOSS Communities: Analyzing Evolvability and Robustness from an Industrial Perspective.- BULB: Onion-Based Measuring of OSS Communities.- A Network of FLOSS Competence Centres.- Profiling F/OSS Adoption Modes: An Interpretive Approach.- Introducing Automated Unit Testing into Open Source Projects.- A Case Study on the Transformation from Proprietary to Open Source Software.- High-Level Debugging Facilities and Interfaces: Design and Developement of a Debug-Oriented I.D.E..- To Rule and Be Ruled: Governance and Participation in FOSS Projects.- A Comparison Framework for Open Source Software Evaluation Methods.- An Exploratory Long-Term Open Source Activity Analysis: Implications from Empirical Findings on Activity Statistics.- Challenges for Mobile Middleware Platform: Issues for Embedded Open Source Software Integration.- Open Source Software Developer and Project Networks.- Warehousing and Studying Open Source Versioning Metadata.- Workshops.- Workshop Open Source Software for Computer Games and Virtual Worlds: Practice and Future.- WoPDaSD 2010: 5th Workshop on Public Data about Software Development.- Second International Workshop on Building Sustainable Open Source Communities OSCOMM 2010.- Open Source Policy and Promotion of IT Industries in East Asia.- OSS 2010 Doctoral Consortium (OSS2010DC).- Panels.- StudentParticipation in OSS Projects.- Open Source Software/Systems in Humanitarian Applications (H-FOSS).- The FOSS 2010 Community Report.- The Present and Future of FLOSS Data Archives.