ARIA (Accessible Rich Internet Applications) are a set of HTML tags and attributes standardized by the W3C (World Wide Web Consortium) in order to make rich internet applications accessible to assistive technology.
Captions are a text version of speech that provide information to people who are Deaf or hard-of-hearing, or by people who process written content better than audio. Captions are also useful for people who can’t turn audio on or are in a loud environment.
Grid 3 is a type of assistive software that allows users to control a computer via eye gaze, a head mouse, or a switch system. It is primarily used by those with physical challenges who find it difficult to use a keyboard and mouse or voice control software.