Dimitris Spiliotopoulos received his B.Sc., M.A., and M.Phil. degrees from the University of Manchester, UK, and his Ph.D. from the Department of Informatics and Telecommunications of the University of Athens, Greece, in 2009. He is an Associate Professor in the Department of Management Science and Technology of the University of Peloponnese, Greece, in the area of Intelligent Information Systems. His research interests include human-computer interaction, social media analysis, usability, accessibility, and recommender systems. Dr. Spiliotopoulos has served as a Technical Programme Committee member for many international journals and conferences, while he has also participated in more than 10 international projects.