Prof. David Harel has been at the Weizmann Institute since 1980, and is currently President of the Israel Academy of Sciences and Humanities. He has worked in several areas of theoretical computer science, including computability theory, logics of programs, database theory, and automata theory. Over the years, he became involved in software and systems engineering, visual languages, graph layout, modeling and analysis of biological systems, odor synthesis and communication, and prosody analysis. He invented Statecharts, co-invented Live Sequence Charts, and was part of the team that designed Statemate, Rhapsody, the Play-Engine and PlayGo. Among his many awards are the ACM Karlstrom Outstanding Educator Award, the Israel Prize, the ACM Software System Award, the Emet Prize, the IEEE Harlan Mills Award, and six honorary degrees. He is a Fellow of ACM, IEEE, EATCS and AAAS, an international member of Academia Europaea, the US National Academy of Sciences, the US National Academy of Engineering, the American Academy of Arts and Sciences, and the Chinese Academy of Sciences, and is a Fellow of the Royal Society (FRS).