John M. Carroll is Distinguished Professor of Information Sciences and Technology at the Pennsylvania State University. His research is in methods and theory in human-computer interaction, particularly as applied to networking tools for collaborative learning and problem solving, and design of interactive information systems. Books include Making Use (MIT, 2000), HCI in the New Millennium (Addison-Wesley, 2001), Usability Engineering (Morgan-Kaufmann, 2002, with M.B. Rosson) and HCI Models, Theories, and Frameworks (Morgan-Kaufmann, 2003), Rationale-Based Software Engineering (Springer, 2008, with J. Burge, R. McCall and I. Mistrik), and Learning in Communities (Springer, 2009). Carroll serves on several editorial boards for journals, handbooks, and series. He is Editor of the Synthesis Lectures on Human-Centered Informatics. Carroll has received the Rigo Award and the CHI Lifetime Achievement Award from ACM, the Silver Core Award from IFIP, the Goldsmith Award from IEEE. He is a fellow of AAAS, ACM, IEEE, and the Human Factors and Ergonomics Society.