A collaboration between leading scientists, practitioners, and researchers at Carnegie-Mellon University and the University of Pittsburgh, this book is a comprehensive resource describing Quality of Life technologies and their development, evaluation, adoption, and commercialization. It takes an interdisciplinary team approach to the process of technology development for disabled and older persons and discusses the state of the art and future directions of technologies. This work provides direction on how to identify user needs and preferences, engage end-users in the design and development process, and evaluate and commercialize the technologies.