Jeffrey Shallit is Professor of the David R. Cheriton School of Computer Science at the University of Waterloo. He is the author of Algorithmic Number Theory (co-authored with Eric Bach) and Automatic Sequences: Theory, Applications, Generalizations (co-authored with Jean-Paul Allouche). He has published approximately 90 articles on number theory, algebra, automata theory, complexity theory, and the history of mathematics and computing.