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Braille
Braille is not a language, but a code which represents a language, such as English, Spanish or French.
Braille consists of a series of raised dots which can be read with the fingers. It was invented by Louis Braille,
a blind Frenchman, in 1829, to help people who are blind or whose eyesight is not sufficiently good enough for
reading printed material.
Braille is comprised of a rectangular six-dot cell (2 dots horizontally by 3 dots vertically), with 63 possible
combinations using one or more of the six dots. There are two types of Braille, Grade 1 and Grade 2.
Grade 1 Braille expresses every letter to form a word, while Grade 2 Braille uses contractions and short-form
words.There are 189 different letter contractions and 76 short-form words used in Grade 2 Braille.
Braille is read by moving the hand or hands from left to right along each line. Both hands are usually involved
in the reading process, and reading is generally done with the index fingers. The average reading speed is
about 125 words per minute, but greater speeds of up to 200 words per minute are possible.
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