Mary Beth Rosson has been an associate professor of computer science at Virginia Tech since 1994. Prior to that, she worked at the IBM T.J. Watson Research Center as a research staff member and as manager of tools and architectures. She is the author of many contributed chapters, journal articles, and conference presentations and papers.John M. Carroll is Professor of Computer Science, Education, and Psychology, and Director of the Center for Human-Computer Interaction, at Virginia Tech. He has written more than 250 technical papers, more than 25 conference plenary addresses, and 12 books. He serves on 10 editorial boards for journals and handbooks, has won the Rigo Career Achievement Award from ACM, received the Silver Core Award from IFIP, and is a member of the CHI Academy.