My gratitude to Bob Elliott of John Wiley & Sons, Inc., for steering this book through three editions. I would also like to thank my development editor, Ed Connor, and my copy editor, Mildred Sanchez, for guidance and support throughout the writing and production processes.
My gratitude is also extended to the multitude of user interface researchers and designers without whose work this book would not have been possible.
I would also like to acknowledge and thank for their contributions several people who have been instrumental in the shaping of my long career. They are: Ralph Notto, Gaithersburg, Maryland, who many, many years ago gave me my first job in the not-then-widely-practiced field of user interface design; Jack Endicott, Chicago, Illinois, who provided me with the opportunity to write my first book; Ed Kerr and Larry Grodman, Wellesley, Massachusetts, who made it feasible for me to establish my own company; and Bob Bailey, Salt Lake City, Utah, and Michael Patkin, Adelaide, SA, Australia, colleagues who have provided me with many useful insights over the years. Thanks also to Rob and Trish Barnett, Canberra, ACT, Australia, who provided important logistical, and technical support when it was needed.
Finally, I would like to thank the many organizations and individuals who have used my services over the past years. Without your support, this book, and others, would not have been possible.