This document provides an introduction and overview of assistive and adaptive technology (AAT). It defines AAT as technologies that support people with disabilities. Assistive technology devices are defined as any item or equipment that increases, maintains, or improves the functional abilities of individuals with disabilities. Adaptive technology categories include positioning, mobility, communication, computer access, adaptive toys/games, adaptive environments, and instructional aids. The document also discusses additional considerations for AAT including performance, ergonomics, practicality, aesthetics, normalization, cost effectiveness, personal acceptance, reliability, safety, and the SETT framework for decision making.