Explanation:Braille, a universally accepted system of writing used by and for blind persons and consists of a code of 63 characters.Each character is made up of one to six raised dots arranged in a six-position matrix or cell.These Braille characters are embossed in lines on paper and read by passing the fingers lightly over the manuscript.Louis Braille, who was blinded at the age of three, invented the system in 1824.He invented it while he was a student at the Institution Nationale des Jeunes Aveugles (National Institute for Blind Children), Paris.World Braille Day is annually celebrated on January 4, the birthday of Braille inventor, Louis Braille in 1824.Thus, the Braille script is based on 6 points.