So how do you differentiate a digit or a letter in text? Well, there is a special symbol called “Number Follows”, which always precedes a symbol that indicating a digit. Different letters are represented by the numbers and positions of raised dots.It should be noted that the first ten letters of the alphabet in Braille system also represent 10 digits, namely, 1 to nine and 0. In Braille’s system, each letter consists of six dot positions arranged in two columns with three dots each. In 1825, inspired by a military code used by soldiers to communicate at night without lights, he invented the non linear writing system. The Braille system was invented by Louis Braille, who was blind at early ages but good at learning. Braille is a system used by people who are visually impaired to write and read.
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