Book excerpt: This resource focuses on the principles, modeling, standards, devices, and technologies of rehabilitation engineering and assistive technology. It describes numerous design models and processes, including participatory action design and service delivery models. The book also discusses the components of devices such as cushions, wheelchairs, prostheses, orthoses, hearing aids, and TTYs. The contributors assess industry standards and explore innovative technology aids, such as sensors, robot-assisted therapy, and speech recognition software. The text contains a set of learning objectives and study questions in each chapter as well as a list of definitions at the end of the book.