CTS 2011 preface

Welcome to the 2011 International Conference on Collaboration Technologies and Systems (CTS 2011). During the conference, attendees will see and interact with a broad spectrum of methodologies and technologies that relate to cooperation, coordination, communication, and collaboration at both the client and backend (cloud) levels. This year´s conference presents a wide array of papers, posters, workshops, panels, demonstrations, exhibits, presentations, and tutorials addressing a broad range of topics including sensor, people, robot and social networks, e-learning, e-business, e-health, emergency response, knowledge management, decision making using clouds, global grids, P2P, multi-agent systems, trust and security, mobile clients, Web 2.0, virtual environments, user interfaces and related human and socio-technical collaboration issues.