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Braille is not a script in the classical sense. Its "glyphs" do have a graphic representation as a partially filled matrix of dots, but they are meant to be punched into thick paper. These dots can be felt as little standouts when readers move their finger tips along their lines. This means that Braille letters can be read in the dark, and by visually impaired persons. Contrary to popular belief, the system was devised by Charles Barbier around 1820 following military demand for a communication system that was both silent and worked in the dark.
Braille is oriented towards representing the basic letters in the Latin script. It has 26 letters (10 of which are also used to represent numerals), 2 shift symbols indicating that the next glyph is uppercase or a numeral, and 9 interpunctuation symbols.