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New York Point (New York Point: ) is a braille-like system of tactile writing for the blind invented by William Bell Wait (1839–1916), a teacher in the New York Institute for the Education of the Blind. The system used one to four pairs of points set side by side, each containing one or two dots.
A full braille cell includes six raised dots arranged in two columns, each column having three dots. [2] The dot positions are identified by numbers from one to six. [2] There are 64 possible combinations, including no dots at all for a word space. [3] Dot configurations can be used to represent a letter, digit, punctuation mark, or even a word ...
A tactile alphabet is a system for writing material that the blind can read by touch. While currently the Braille system is the most popular and some materials have been prepared in Moon type , historically, many other tactile alphabets have existed:
The Unicode name of a specific pattern mentions the raised dots: U+2813 ⠓ BRAILLE PATTERN DOTS-125 has dots 1, 2 and 5 raised. By exception, the zero dot raised pattern is named U+2800 ⠀ BRAILLE PATTERN BLANK. [4] In the 8-dot cell each dot individually can be raised or not. That creates 2 8 =256 different patterns.
The 64 braille patterns are arranged into decades based on the numerical order of those patterns. The first decade are the numerals 1 through 0, which utilize only the top and mid row of the cell; the 2nd through 4th decades are derived from the first by adding dots to the bottom row; the 5th decade is created by shifting the first decade downwards.
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Braille arranged his characters in decades (groups of ten), and assigned the 25 letters of the French alphabet to them in order. The characters beyond the first 25 are the principal source of variation today. In the first decade, only the top four dots are used; the two supplementary characters have dots only on the right.
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