studied mathematics, sociology and business administration. Between 1991 and 2000 he worked as a researcher at the Research Group for HCI and CSCW (ProSEC) at the University of Bonn. He then worked at project managing agency for “New Media in Education” of the Federal Ministry of Education and Research (BMBF) and as an associate professor at the Technical Univerity Chemnitz in the summer semester 2002. Since August 2002 Helge Kahler works at the BMBF. He received a Ph.D. degree from the University of Roskilde/Denmark with his thesis “Supporting Collaborative Tailoring” and is one of the founders of the International Institute for Socio-Informatics (IISI). From the 15th of June 2006 his membership is suspended at his own request.