In this final tutorial we are asked for a definition of assistive technology, and to introduce one piece of assistive technology and its use.
Cook and Hussy (1995) mentioned that assistive technology is "any piece of equipment or product system whether acquired commercially off the shelf, modified or customised that is used to increase or improve functional capabilities of individuals with disabilities". and that its functional outcome can really only be measured by it's success.
pretty self explanatory really..

Cook, A.M., and Hussey, S.M. (1995). Assistive technologies: principles and practice. St Louis. Mosby - Year Book Inc