Welcome to the proceedings of the 1st International Conference on Network- Based Information Systems (NBiS-2007), in conjunction with the 18th Inter- tional Conference on Database and Expert Systems Applications DEXA-2007, which was held in Regensburg, Germany, September 3-4, 2007. The main objective of NBiS-2007 was to bring together scientists, engineers, and researchers from both network systems and information systems with the aimofencouragingtheexchangeofideas, opinions, andexperiencebetweenthese two communities. NBiS started as a workshop and for 9 years it was held together with DEXA...