The braille system, devised by Frenchman Louis Braille in 1829, is a method designed to enable the blind to read. It consists of a system of raised dots on paper prints using a special machine. The blind walk these points with the fingertips and touch, distinct differences between them. The various letters, numbers or punctuation marks are characterized by the amount and location of the six points that form each of the characters. They have two dots wide by three high. The points are recorded on the back of the paper, in reverse, to be read in front of it, according to the normal direction of reading.
If. They can do this in the Braille system. They do it with a stylus on a special board or using a Perkins engine, which is similar to the common typewriter.