Stefano Federici is a professor in general psychology and psychology of disability at the University of Perugia, Italy. He has been a very active researcher in assistive technology for the disabled over the past 15 years and has published extensively in this area. In addition to the first edition, he has also published several additional reference works in the field.

Marcia Scherer is a rehabilitation psychologist and founding President of the Institute for Matching Person & Technology She is also Professor of Physical Medicine and Rehabilitation, University of Rochester Medical Center where she received both her Ph.D. and MPH degrees. She is a past member of the National Advisory Board on Medical Rehabilitation Research, National Institutes of Health, and is Editor of the journal Disability and Rehabilitation: Assistive Technology. Dr. Scherer is Fellow of the American Psychological Association, American Congress of Rehabilitation Medicine, and the Rehabilitation Engineering and Assistive Technology Society of North America (RESNA). Dr. Scherer has authored, edited, or co-edited nine books and has published over seventy-five articles in peer-reviewed journals as well as thirty book chapters on disability and technology. Her research has been cited more than 4500 times by others.