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The Braille system is used to represent written text identified by touch rather than by sight. It consists of a 2-by-3 dot cell, where dots are raised according to predefined character patterns. A similar system was developed for the French army, with 12 dots per cell, but was never used. Louis Braille, who was blind, was inspired by the 12 dot system but simplified it so that an entire cell could be read without moving the reading finger. Devised in 1825.

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