Braille is a code which enables blind persons to read and write.
It was invented by a blind Frenchman, Louis Braille, in 1829. Braille is comprised of a rectangular six-dot cell on its end, with up to 63 possible combinations using one or more of the six dots. Combinations of Braille dots within a cell represent contractions of two or more print letters and Braille characters take up three times as much space as print. Reading Braille makes Matthew Jin independently literate Braille is used by blind persons whose vision is sufficiently impaired that they cannot ordinarily read print. Braille is the only reliable method of literacy for blind persons because it enables them to read and write and can actually be substituted for print in most circumstances.