accessibility, The quality of a system incorporating hardware or software that makes it usable by people with one or more physical disabilities, such as restricted mobility, blindness, or deafness.

ActiveX, A set of technologies that enables software components to interact with one another in a networked environment, regardless of the language in which the components were created. ActiveX is used primarily to develop interactive content for the World Wide Web, although it can be used in desktop applications and other programs. See also ActiveX controls.

ActiveX controls, Reusable software components that incorporate ActiveX technology. ActiveX controls can be embedded in Web pages to produce animation and other multimedia effects, interactive objects, and sophisticated applications.