What is braille? How does it work?why is it useful? Who invented it? Why was it invented?
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Braille is a book that is used by the blinds.It has pores of dotted inks that are in the form of a written book. It is useful as many blinds like Helen Keller can learn their study. Louis Braille invented this .It was invented because Louis Braille doesn't wanted others blinds like him be Illiterate,,,like him.
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