Jakob Nielsen is co-founder of Nielsen Norman Group. His latest book, Designing Web Usability: The Practice of Simplicity, has sold a quarter million copies in 13 languages and was called "the most important book of the year" by NewMedia magazine. Dr. Nielsen has been called: "the world's leading expert on Web usability" (U. S. News & World Report) , "the best-known design and usability guru on the Internet" (Financial Times) , "the reigning guru of Web usability" (FORTUNE), "the world's leading expert on Web usability" (CNet), "the smartest person on the Web" (ZDNet), "eminent Web usability guru" (CNN), "the usability Pope" (Wirtschaftswoche Magazine in Germany), "the patron saint of ordinary computer users" (Dr. Dobb's Journal), and "the hand that cracks the usability whip" (Darwin Magazine).

Richard Buchanan, Ph. D., is Professor of Design and Head of the School of Design at Carnegie Mellon University. He teaches in the areas of Interaction Design, Communication Planning, and New Product Development. Among his numerous publications are Discovering Design: Explorations in Design Studies (University of Chicago Press) and The Idea of Design (MIT Press). Buchanan is President of the Design Research Society, an international learned society with offices in London, and he is editor of Design Issues: History, Theory, Criticism, an international journal published by MIT. Press. He received his A. B. and Ph. D. from the University of Chicago.