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Lewis Carroll's nyctographic alphabet. Each character had a large dot or circle in the upper-left corner. Beside the 26 letters of the alphabet, there were five additional characters for 'and', 'the', the corners of the letter 'f' to indicate that the following characters were digits ('figures'), the corners of the letter 'l' to indicate that they were letters, and the corners of the letter 'd ...
Books written in embossed alphabets like braille are quite bulky, and New York Point's system of two horizontal lines of dots was an advantage over the three lines required for braille; the principle of writing the most common letters with the fewest dots was likewise an advantage of New York Point and American Braille over English Braille.
The book finishes with a proposal for braille shorthand, utilizing the first decade for vowels, and the fifth for consonants (without a voicing distinction). That is, Braille's shorthand used a 4-dot cell rather than the standard 6-dot cell, taking two-thirds the space of normal braille, and one-third the space of Barbier's night writing.
English Braille, also known as Grade 2 Braille, [1] is the braille alphabet used for English. It consists of around 250 letters , numerals, punctuation, formatting marks, contractions, and abbreviations . Some English Braille letters, such as таб ch , [2] correspond to more than one letter in print.
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:
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Unicode uses the standard dot-numbering 1 to 8. Historically only the 6-dot cell was used in braille. The lower two dots were added later, which explains the irregular numbering 1-2-3-7 in the left column and 4-5-6-8 in the right column. Where dots 7 and 8 are not raised, there is no distinction between 6-dot and 8-dot definitions.
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