My understanding of this topic:

An Assistive Technology Device is, “…any item, piece of equipment, or product system, whether acquired commercially off the shelf, modified, or customized that is used to increase, maintain, or improve functional capabilities of a child with a disability” (Dell, Newton, & Petroff, 2012). Adaptive and assistive technology includes products and services to help people who have difficulty speaking, typing, writing, remembering, pointing, seeing, hearing, learning, walking, etc. It is important to note that different disabilities require different adaptive and assistive technologies.

Sources:
http://www.ncld.org/students-disabilities/assistive-technology-education
Dell, A., Newton, D., & Petroff, J. (2012). Assistive technology in the classroom: Enhancing the school experiences of students with disabilities. (2 ed., p. 112). New Jersey: Pearson Education Inc.

Educational example of this topic:

Students can save, share, and create documents for free via Google Drive. Students in a group can all be working on the same document at the same time. This is a great resource for group work and for computers that do not have word processor.

Example:
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Media support:
Click below to learn more!

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Link:
https://www.google.com/drive/using-drive/
https://www.google.com/edu/training/tools/drive/level1.html