SUTC 2006 is an international forum for researchers to exchange information regarding advancements in the state of the art and practice of sensor networks, ubiquitous and trustworthy computing, as well as to identify the emerging research topics and define the future of sensor networks, ubiquitous and trustworthy computing. The proceedings also contains the four SUTC 2006 Workshops. CAUL 2006 covers context aware ubiquitous learning the computer supported learning paradigm for identifying learners¿ surrounding contextual environment and social presence to provide integrated, interoperable, pervasive, and seamless learning experiences. The objective of context aware ubiquitous learning is to move Web and mobile learning a step further from learning at anytime anywhere to be at the right time and right place with right learning resources and right learning peers. MTUC 2006 discusses ideas, results, work in progress and experience of research in the area of multimedia services. WCDSN 2006 provides a unique opportunity to obtain an insight on technical challenges and latest developments in wireless communication and distributed sensor network technology. This workshop will provide the participants the opportunity of sharing the latest developments of research ideas, results and experience in wireless communication and sensor network technology.