He conducts research related to knowledge acquisition for intelligent systems, knowledge-system architecture, and medical-sdecision support. He has directed the Protégé project since its inception in 1986, emphasizing the use of explicit ontologies and reusable problem-solving methods to build robust knowledge-based systems. He has an MD from Brown University and a PhD from Stanford. Contact him at Stanford Medical Informatics, 251 Campus Dr., Stanford Univ., Stanford, CA 94305; musen@smi.stanford.edu; http://smi-web.stanford.edu/people/musen.