Defining Assistive Technology and the Target Populations -- Use of Microswitches in Habilitation Programs -- Speech-Generating Devices for Communication and Social Development -- Instructional Technology for Promoting Writing, Work, and Leisure Skills -- Orientation Systems for Promoting Indoor Travel -- Technology-Based Approaches for Promoting Ambulation -- Assistive Technology for Reducing Problem Behavior -- Giulio E. Lancioni, Jeff Sigafoos, Mark F. O'Reilly and Nirbhay N. Singh.