Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Optacon(also: Optical-to-Tactile Converter)
- A historical assistive device developed in the 1970s that enabled blind people to read printed text by converting visual images of letters into tactile vibration patterns felt with the fingertip. Users would move a small camera across printed text while their other hand rested…
- Put That There(also: Put-That-There)
- A pioneering multimodal interactive system built at MIT's Architecture Machine Group (1979-1980), reported by Bolt (1980) and further developed by Schmandt and Hulteen (1982). Users seated in a 'media room' could manipulate a graphical database — such as a Caribbean shipping map…
- Teletext(also: Ceefax, Oracle)
- A text-based information service broadcast within the television signal that allowed viewers to access pages of text and simple graphics using their TV remote control. Originating in the UK with the BBC's Ceefax service in 1974, teletext provided news, weather, sports results,…
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