OSCAR BURRIEL / SCIENCE PHOTO LIBRARY OSCAR BURRIEL / SCIENCE PHOTO LIBRARY
Braille. Face of a blind man superimposed on a sheet written in braille. The braille writing and reading system was devised by the French teacher Louis Braille (1809-1852) to enable blind people to have access to written language. It consists of a sequence of cells each of which contains a pattern of raised dots that can be sensed by touch through the fingers. Different patterns of dots represent letters, numbers, punctuation marks and several short words.
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