This book constitutes the refereed proceedings of the 5th International Conference on Practical Aspects of Knowledge Management, PAKM 2004, held in Vienna, Austria in December 2004. The 48 revised full papers presented were carefully reviewed and selected from 163 submissions. All current issues in knowledge management are addressed, in perspective to topics like business process modeling, mobile computing, knowledge management systems, peer-to-peer networks, user interfaces, enterprise information systems, computer supported collaborative work, web information systems, web communities, ontologies, multimedia, semantic web, fuzzy logic.