Full Papers -- FOCSE: An OWA-based Evaluation Framework for OS Adoption in Critical Environments -- Open Source Collaboration for Fostering Off-The-Shelf Components Selection -- From the Cathedral to the Bazaar: An Empirical Study of the Lifecycle of Volunteer Community Projects -- Project Entity Matching across FLOSS Repositories -- Can Knowledge Management be Open Source? -- Emergent Decision-Making Practices in Free/Libre Open Source Software (Floss) Development Teams -- Experiences on Product Development with Open Source Software -- Exploring the Effects of Coordination and Communication Tools on the Efficiency of Open Source Projects using Data Envelopment Analysis -- Innovation in Open Source Software Development: A Tale of Two Features -- Corporate Involvement of Libre Software: Study of Presence in Debian Code over Time -- Sprint-driven development: working, learning and the process of enculturation in the PyPy community -- Using Repository of Repositories (RoRs) to Study the Growth of F/OSS Projects: A Meta-Analysis Research Approach -- Community Structure, Individual Participation and the Social Construction of Merit -- OpenBQR: a framework for the assessment of OSS -- Network Analysis of the SourceForge.net Community -- Short Papers -- Influence in the Linux Kernel Community -- EDOS Distribution System: a P2P architecture for open-source content dissemination -- Reusing an open source application - practical experiences with a mobile CRM pilot -- The role of trust in OSS communities - Case Linux Kernel community -- Authenticating from multiple authentication sources in a collaborative platform -- Learning and the imperative of production in Free/Open Source development -- Open source technologies for visually impaired people -- Different Bug Fixing Regimes? A Preliminary Case for Superbugs -- Free/Open Services: Conceptualization, Classification, and Commercialization -- Surveying Industrial Roles in Open Source Software Development -- Guiding the Discovery of Open Source Software Processes with a Reference Model -- Effect of Coupling on Defect Proneness in Evolutionary Open-Source Software Development -- The Use of Open Source Software in Enterprise Distributed Computing Environments -- Shared Assumption Concerning Technical Determination in Apache Web Server Developer Community -- Learning Through Practical Involvement in the OSS Ecosystem: Experiences from a Masters Assignment -- Release Management in Free Software Projects: Practices and Problems -- Context-Dependent Evaluation Methodology for Open Source Software -- Benefits and Drawbacks of Open Source Software: An Exploratory Study of Secondary Software Firms -- Introducing Usability Practices to OSS: The Insiders' Experience -- Perceptions on F/OSS Adoption -- Open Source Software and Open Data Standards as a form of Technology Adoption: a Case Study -- Free/Open Source Software Adoption, Public Policies and Development Indicators: An International Comparison -- Levels of Formality in FOSS Communities -- Stakeholder value, usage, needs and obligations from differnet types of F/LOSS licenses -- Panels -- to Panel Discussions at the Third International Conference on Open Source Systems - OSS 2007 -- Legal issues for free and open source software in government -- Data and analyses sharing to support research on free/libre open source software -- Tutorials -- to OSS 2007 Tutorial Program -- How to Gather FLOSS Metrics -- EDOS-Tools Tutorial: EDOS Tools for Linux Distributions Dependencies Management and Quality Assurance -- Quality Specification, Testing and Certification of Bespoken, Open Source and Commercial Off-The-Shelf Systems -- Workshops -- to Workshops at the Third International Conference on Open Source Systems - OSS 2007 -- 1st International Workshop on Trust in Open Source Software (TOSS) -- Open Source Software and Product Lines 2007 -- Toward a New Industrial Organization? OSS in Economic and Managerial Perspective -- 2nd International Workshop on Public Data about Software Development (WoPDaSD 2007) -- FOSLET 07 - Workshop on Free and Open Source Learning Environments and Tools.