Today, we ues Braille not only to write words in all languages, but also to write math and music. Braille people send Braille greeting cards, wear Braille watches, type on Braille keyboard, and take elevatore with Braille controls. Louis Braille had no idea hoe many people he had helped. On the doors of the house where he was born are the words "He opened the doore of knowledge to all those who cannot see."