Abbreviation for the Special Educational Needs and Disability Act (2001), which has a vital role in improving accessiblity for a wide range of computer users with special needs and obliges designers of educational websites "to make reasonable adjustments to ensure that people who are disabled are not put at a substantial disadvantage compared to people who are not disabled." See JISC's website on disability legislation: http://www.jisclegal.ac.uk/disability/accessibility.htm. See: Accessibility, Assistive Technology, Text To Speech (TTS)