short note on braille system
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Braille system: A system of raised-dot writing devised by Louis Braille (1809-1852) for the blind in which each letter is represented as a raised pattern that can be read by touching with the fingers.
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Explanation:
The Braille system is a way of writing things. ... The system is used by blind people to read and write. The Braille system uses a set of raised bumps or dots that can be felt with a finger. Each set of dots is a character in an alphabet, and the numbers and some punctuation.
Trained readers of Braille can read about 100 words per minute; trained readers who do not have sight problems can get to around 250 to 300 words per minute.
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