With more than 4,000 developing technologies that enable persons with disabilities to live more productive, independent and fulfilling lives, this academic discipline has emerged to provide human services professionals with a variety of skills and theoretical knowledge to ensure that assistive technology (AT) users are able to access and benefit fully from advances in the field. Physical disabilities affect every sector of the population - school-age children, young adults, seniors, veterans and more. In addition, because lifespans are lengthening, and disability often accompanies increasing age, the U.S. Department of Labor predicts substantial long-term growth in all health-service sectors, including the areas of assistive, adaptive and access technologies.