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Computing (FOLDOC) dictionary (also found in English - Vietnamese, English - English (Wordnet), French - Vietnamese)
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human language /breyl/ (Often capitalised) A class of
writing systems, intended for use by blind and low-vision
users, which express glyphs as raised dots. Currently
employed braille standards use eight dots per cell, where a
cell is a glyph-space two dots across by four dots high; most
glyphs use only the top six dots.
Braille was developed by Louis Braille (pronounced /looy
bray/) in France in the 1820s. Braille systems for most
languages can be fairly trivially converted to and from the
usual script.