The 3rd IEEE International Conference on Distributed Computing in Sensor Systems (DCOSS ‘07) will take place in the city of Santa Fe, New Mexico, USA during Monday, June 18 - Wednesday, June 20, 2007.DCOSS 2005 (Marina del Rey, California) and DCOSS 2006 (San Francisco, California) featured high quality research papers and interesting invited and contributed posters. DCOSS ‘07 is intended to cover several aspects of distributed computing in sensor systems such as high level abstractions, computational models, systematic design methodologies, algorithms, analysis and applications.The conference will be co-located with several closely related workshops, and will provide a forum for researchers and practitioners to present their contributions related to the above high-level aspects of distributed sensor systems. In addition to contributed papers, the meeting will also include keynote addresses by leading researchers, a panel discussion, and a poster session.