PETER FRITZSON, PhD, is a professor and Director of the Programming Environment Laboratory (PELAB) at the Department of Computer and Information Science, Linköping University, Sweden. He currently holds the positions of president of MathCore Engineering AB; chairman of the Scandinavian Simulation Society; secretary of the European simulation organization, EuroSim; and vice chairman of the Modelica Association, an organization he helped to establish. Professor Fritzson has published ten books and over a hundred scientific papers.