Prof. Dr.-Ing. Matthias Hemmje is responsible for the field of Multimedia and Internet Applications at the FernUniversität in Hagen. His primary research interests include user interfaces, multimedia database systems, information visualization, and multimedia technologies.Prof. Dr.-Ing. Stefan Wagenpfeil holds a professorship in Software Engineering and IT Management at PFH Göttingen and works as an IT consultant and expert. Thanks to his many years of experience in the media sector and his research focus on multimedia, the content is presented in a highly practice-oriented manner.