BRAILLE

Braille system is a method that is used by people who are visually impaired to read and write. It was the first digital form of writing. It's derived from the Latin alphabet.

Braille was invented in 1825 by Louis Braille, a blind Frenchman. Each Braille character is made up of six dot positions, arranged in a rectangle containing two columns of three dots each.

The Braille system was based on a method of communication originally developed by Charles Barbier in response to Napoleon's demand for a code that soldiers could use to communicate silently and without light at night called night writing.