Information Systems Development (ISD) progresses rapidly, continually creating new challenges for the professionals involved. New concepts, approaches and techniques of systems development emerge constantly in this field. Progress in ISD comes from research as well as from practice. The aim of the Conference is to provide an international forum for the exchange of ideas and experiences between academia and industry, and to stimulate exploration of new solutions. The 18th International Conference on Information Systems Development (ISD2009) will be hosted by Jiangxi University of Finance and Economics, Nanchang in China. The theme of the conference is “Challenge of Practice and Theory in Web-based Information Services”. The conference features a number of tracks covering a wide spectrum of topics in the area of Information Systems Development.