Prof. Reto Wettach, stonemason, book author and designer. Since 2004 heand his colleagues have been building up a course in Interface Design at the Fachhochschule Potsdam, the only such course on this subject in Germany. Prior to that he worked as a designer and researcher for Sonyin Tokyo and for IDEO in San Francisco. Reto Wettach also heads up the IDL, the Interaction Design Lab., at the Fachhochschule Potsdam, a research unit which explores the future of the way we handle computer technology.