The design space of information services evolved from seminal works through a set of prototypical hypermedia systems and matured in open and widely accessible web-based systems. The original concepts of hypermedia systems are now expressed in different forms and shapes. The first works on hypertext invented the term itself, laid out the foundational concept of association or link, and highlighted navigation as the core paradigm for the future information systems. The first engineered systems demonstrated architectural requirements and models and fostered the emergence of the conceptual model related with the information systems and the information design. The artifacts for interaction, navigation, and search, grew from the pioneering systems. Multimedia added a new dimension to hypertext, and mutated the term into hypermedia. The adaptation of the primitive models and mechanisms to the space of continuous media led to a further conceptual level and to the reinvention of information design methods. Hypermedia systems also became an ideal space for collaboration and cooperative work. Information access and sharing, and group work were enabled and empowered by distributed hypermedia systems. As with many technologies, a winning technical paradigm, in our case the World Wide Web, concentrated the design options, the architectural choices and the interaction and navigation styles. Since the late nineties, the Web became the standard framework for hypermedia systems, and integrated a large number of the initial concepts and techniques. Yet, other paths are still open. This lecture maps a simple "genome" of hypermedia systems, based on an initial survey of primitive systems that established architectural and functional characteristics, or traits. These are analyzed and consolidated using phylogenetic analysis tools, to infer families of systems and evolution opportunities. This method may prove to be inspiring for more systematic perspectives of technological landscapes. Table of Contents: Introduction / Original Visions and Concepts / Steps in the Evolution / Information and Structured Documents / Web-Based Environments / Some Research Trends / A Framework of Traits / A Phylogenetic Analysis / Conclusion

This volume presents the proceedings of the 15th International Workshop of Groupware (CRIWG 2009). The conference was previously held in USA, (- aha)in 2008, Argentina (Bariloche)in 2007, Spain (Medina del Campo) in 2006, Brazil (Porto de Galinhas) in 2005, Costa Rica (San Carlos) in 2004, France (Autrans) in 2003, Chile (La Serena) in 2002, Germany (Darmstadt) in 2001, Portugal (Madeira Island) in 2000, Mexico (Cancun) in 1999, Brazil (Buzios) in 1998, Spain (El Escorial) in 1997, Chile (Puerto Varas) in 1996, and Portugal (Lisbon) in 1995. The CRIWG workshops seek to advance theoretical, experimental, and - plied technical knowledge of computer supported collaboration. In the CRIWG workshops, researchers and professionals report ?ndings, exchange experiences, and explore concepts for improving the success of people making a joint e?ort toward a group goal. Topics of discussion are wide ranging, encompassing all aspects of design development, deployment, and use of groupware. CRIWG embraces both mature works that are nearly ready for publication in peer review journals, and new, cutting-edge works in progress. A total of 30 papers were accepted for presentation this year-16 full papers and 14 works in progress.Papersweresubjectedtodouble-blindreviewbyatleastthreemembers of the Program Committee. The papers are organized into nine sessions, on eight di?erent themes: Mobile Collaboration, Social Aspects of Collaboration I & II, Technologies for CSCW, Groupware Evaluation, CSCW Design, Geo Collaboration, Collaborative Learning and Modeling CSCW.

Mobile devices are rapidly taking over the digital and interactive world. Their role within our lives is growing in diversity and importance. As their importance within society continues to grow, features, functionalities and usage opportunities accompany such growth, turning mobile devices into essential tools. As mobile interactive technology assumes this role, issues of usability and interaction become paramount. Consequently, mobile usability evaluation needs to re-invent itself to keep pace with this new phenomenon. Designing and Evaluating Mobile Interaction: Challenges and Trends reviews the current approaches and recent advances in the design and evaluation of mobile interaction and mobile user interfaces. In particular, it focuses on the two stages that present the biggest challenges, but are also the most important for the design and validation of mobile interaction, namely the prototyping and evaluation stages. It presents an overview of the current state-of-the-art, addressing recent and emerging work on these two stages of the design process. Designing and Evaluating Mobile Interaction: Challenges and Trends is an invaluable reference for developers, engineers, designers and researchers with an interest in mobile usability and interaction. It addresses the challenges, the most significant results and the upcoming research directions.