From the Assistive Technology Industry Association.

What is assistive technology?

Assistive technology includes products, equipment, and systems that enhance learning, working, and daily living for people with disabilities.

Assistive technology helps people who have difficulty speaking, typing, writing, remembering, pointing, seeing, hearing, learning, walking, and many other things. Different disabilities require different assistive technologies.

Choosing the right assistive technology

Most often, the choice is a decision you make with a team of professionals and consultants trained to match particular assistive technologies to specific needs. An AT team may include family doctors, regular and special education teachers, speech-language pathologists, rehabilitation engineers, occupational therapists, and other specialists including consulting representatives from companies that manufacture assistive technology.