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Valentine Hauy developed a system of writing slightly modified letters in reverse on the back of heavy paper, using a metal pin with a rounded tip.
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The first raided dot code for writing was invented by Charles Barbier, an army artillery officer, because he needed a way to read by touch during night maneuvers.
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Louise Braille created and published a code based on a series of embossed dots.
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When schools for the blind in Boston and Philadelphia refused to accept Louise Braille's code, William Wait developed New York Point, which resembles Braille characters turned on their side.
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Yet another embossed writing code was developed by Joel Smith.
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Standard English Braille was finally adopted by the U.S. and Great Britain as the uniform method of reproducing printed material.
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This code was developed to permit the representation of a wide variety of literary and technical material in use in the English speaking world.