Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Narrator(also: Windows Narrator): The built-in screen reader included with Microsoft Windows operating systems. Narrator reads aloud text on screen, describes notifications and interface elements, and allows users to navigate Windows and applications using keyboard commands. First introduced in Windows 2000 as a…
Navigability(also: Ease of Navigation, Web Navigability): The ease and efficiency with which a user can move through a web page, application, or document to reach their intended content. For accessibility practice, navigability is a primary determinant of whether a screen-reader, voice-browser, or keyboard-only user can actually…
Navigation Granularity(also: Text Navigation Level, Granularity Level): The unit of text movement when navigating through content—typically character, word, sentence, line, or paragraph level. Screen reader users must select their desired navigation granularity before moving through text, and the choice significantly affects editing efficiency.…
Non-Visual Web Access(also: Non-Visual Browsing, Nonvisual Web Access): The use of the web without relying on visual display, typically through screen readers, voice browsers, or refreshable braille displays that convert web content into speech or tactile output. Non-visual web access depends heavily on proper semantic HTML, alternative text for…

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