**Any item, piece of equipment, product, system or software, whether acquired commercially off the shelf, modified, or customized, that is used to increase, maintain, or improve functional capabilities of individuals with disabilities.
**The state a product or service attains when it satisfies all the requirements of a given specification.
**When a document's presentation changes to accommodate a user's need, e.g. after linearizing web content, the new presentation offers the same functionality as the original.
** That status of information in a specification that is not required for conformance but contributes to the correct use and implementation of the specification.
** A presentation that arranges web content in a sequential order. Linearization changes side-by-side displayed content into a one column format. This should be in a logical reading order.
**Data that describes, highlights and/or explains other data. Including items such as authorship, key words, character set, publication dates and language. The inclusion of metadata in a web document helps indexing, searching processes and semantic analysis.
** The status of descriptions or prescriptions that lie outside the normative criteria of a specification.
** The status of criterion that must be satisfied for conformance with a given specification.
**An event that occurs simultaneously with its reporting or recording— For example, in closed captioning text captions are written as the text is spoken.
** Transformation of machine-readable information into a form perceivable and usable to a human user. Document markup such as HTML or CSS may be incomprehensible to the human user, but a user agent may transform it into a meaningful form. For example an <em> HTML element indicates that emphasis is intended. The user agent may emphasis the content responding to CSS directions by changing font or tone of voice.
** Web accessibility means that the Web interface is designed so that people with disabilities can perceive, understand, navigate, and interact with it effectively, as well as create and contribute content to the Web.