Rex Hartson is Professor Emeritus of Computer Science at Virginia Tech, Blacksburg, VA, where he is the founding faculty member in HCI. For 30 years, as a pioneer in HCI as a field and in usability engineering as a discipline and practice, he helped develop many of the techniques described in this book and which are now considered an integral part of good practice.
He is author of over 70 refereed journal articles, conference papers, and book chapters, editor or co-editor for Advances in Human-Computer Interaction, Volumes 1-4, Ablex Publishing Co., Norwood, NJ, and co-author of first book to emphasize the usability engineering process (Hix, D., & Hartson, H. R. Developing user interfaces: Ensuring usability through product & process, 1993, John Wiley & Sons, Inc.). Hartson also has extensive practical experience in consulting and training for business, industry, and government.
Pardha Pyla is a Senior Interaction Designer at Bloomberg L. P., New York, NY. He is one of the pioneering researchers in the area of connecting software engineering and usability engineering lifecycles. He has consulting experience in integrating user experience processes into industrial software development practices. Pyla has a bachelors degree in Electronics and Communications Engineering from Nagarjuna University (India), masters degrees in both Computer Engineering and Computer Science from Virginia Tech, and a Ph.D. in Computer Science from Virginia Tech.