blindness Reference Libraries

The Braille system is a method that is widely used by blind people to read and write. It was devised in 1821 by Louis Braille, a blind Frenchman. The Braille characters are made up of six dot positions arranged in a rectangle containing two columns of three dots each. Including a subset when dots are not raised, there are sixty-four possible subsets. The positions on the grid are number 1-3...