Deborah A. Levinson has worked for more than 20 years providing expert user experience design and consultation, usability testing, and content assessment to software companies, higher education, and nonprofit institutions, including MIT, Furman University, the American Academy of Arts & Sciences, and the Mind and Life Institute. She has also taught introductory responsive web coding and jQuery to design students at Northeastern University. Debby is an MIT graduate and the co-author of Visual Usability: Principles and Practices for Designing Digital Applications (Morgan Kaufmann) and The MIT Guide to Teaching Web Site Design (MIT Press). Todd Belton started programming computers in elementary school. Today, he primarily writes middleware to glue large databases to web applications. In his spare time he writes things that are not code, and plays more computer games than he cares to admit.