Jakob Nielsen is a principal of the Nielsen Norman Group and has been called "the world's leading expert on Web usability" by U.S. News and World Report. His Alertbox column has been published on the Internet since 1995 (www.useit.com). A previous Sun Microsystems Distinguished Engineer, Nielsen is the author of numerous books, including the worldwide best-seller Designing Web Usability (New Riders, 2000).
Hoa Loranger is a User Experience Specialist at Nielsen Norman Group. Loranger consults with well-known companies in various industries including finance, customer support, and entertainment. She conducts international usability research worldwide and gives keynote presentations and tutorials on a variety of Web usability topics. She has also co-authored numerous reports on topics ranging from teenagers' use of the Web to the design of Flash-based applications.