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2. ADA Signs - Wikipedia

   en.wikipedia.org/wiki/ADA_Signs

   The term "ADA Signs" has come into common use in the architectural, construction and signage industries with the advent of the Americans With Disabilities Act, or ADA.The Americans with Disabilities Act regulates accessibility; and includes requirements for signage that is conveniently located and easy to read both visually and through tactile touch.

3. Braille - Wikipedia

   en.wikipedia.org/wiki/Braille

   where the word premier, French for "first", can be read. Braille was based on a tactile code, now known as night writing, developed by Charles Barbier. (The name "night writing" was later given to it when it was considered as a means for soldiers to communicate silently at night and without a light source, but Barbier's writings do not use this term and suggest that it was originally designed ...

4. Tangible symbol systems - Wikipedia

   en.wikipedia.org/wiki/Tangible_symbol_systems

   Tangible symbols are used as a means of communication for individuals who are unable to understand or communicate using abstract systems, such as speech or sign language. [ 2 ] [ 4 ] Properties of tangible symbols include permanency, capacity to be manipulated by both the user and the communication partner, and an obvious relationship between ...

5. English Braille - Wikipedia

   en.wikipedia.org/wiki/English_Braille

   English Braille, also known as Grade 2 Braille, [1] is the braille alphabet used for English. It consists of around 250 letters ( phonograms ), numerals , punctuation, formatting marks, contractions, and abbreviations ( logograms ).

6. Unified English Braille - Wikipedia

   en.wikipedia.org/wiki/Unified_English_Braille

   Unified English Braille is designed to be readily understood by people familiar with the literary braille (used in standard prose writing), while also including support for specialized math and science symbols, computer-related symbols (the @ sign [1] as well as more specialised programming-language syntax), foreign alphabets, and visual ...

7. United is adding Braille signs inside planes to help blind ...

   www.aol.com/news/united-adding-braille-signs...

   United Airlines says it will install Braille signs to help visually impaired travelers find row and seat numbers and lavatories. The airline said Thursday that it has outfitted about a dozen ...