Prof David Harel is a computer scientist at the Weizmann Institute of Science in Israel. He was Department Head from 1989 to 1995, and was Dean of the Faculty of Mathematics and Computer Science between 1998 and 2004. He was also co-founder of I-Logix, Inc., now part of IBM. He received his PhD from MIT in 1978, and has spent time at IBM research, and sabbaticals at Carnegie-Mellon, Cornell, and Edinburgh Universities. In the past he worked mainly in theoretical computer science (logic, computability, automata, database theory), and he now works mainly on software and systems engineering and on modeling biological systems. He is the inventor of Statecharts and co-inventor of Live Sequence Charts (LSCs), and co-designed Statemate, Rhapsody, the Play-Engine and PlayGo. Among his expository books are “Algorithmics: The Spirit of Computing” and “Computers Ltd.: What They Really Can’t Do”, and his awards include the ACM Karlstrom Outstanding Educator Award (1992), the Israel Prize (2004), the ACM Software System Award (2007), the Emet Prize (2010), and four honorary degrees. He is a Fellow of the ACM, the IEEE and the AAAS, and a member of the Academia Europaea and Israel Academy of Sciences.