what is braille script

Braille is a tactile writing system used by people who are visually impaired. It was invented by Louis Braille in 1824 while he was a student at the National Institute for Blind Children in Paris. Braille uses raised dots to represent letters of the alphabet, punctuation marks, and other symbols. It can be read either on embossed paper or by using refreshable braille displays that connect to computers and smartphone devices. Braille is not a language itself, but rather a code by which many languages can be written and read. The braille alphabet consists of a pattern of six raised dots arranged in two parallel rows, with each dot position identified by a number from one to six. Sixty-four combinations are possible using one or more of these six dots, and a single cell can be used to represent an alphabet letter, number, punctuation mark, or even a whole word.