This world consists of both abled and disabled people. An abled person can perform activities of daily living (ADL) with ease.
However, for a disabled person, he/she has difficulty in performing ADLs. Hence, they require assistance. Assistance can be
provided either by humans or by machines. Assistance is provided either manually or automatically. Before the invention of
assistive devices, humans used to take care of disabled people. Assistive devices are invented later to overcome disadvantages in the
traditional method of assistance
