Braille pattern, dots 1–2

No single reading applies across all Braille codes. The text character records the raised-dot arrangement; the code for a language or subject decides whether it is a letter, punctuation, or another sign.

How did six-dot Braille begin?

It grew from Charles Barbier’s earlier raised-dot code. Barbier proposed a twelve-dot tactile writing method for blind readers and others who could not read print. Students at the Paris school tested it in 1821. Louis Braille began developing a six-dot system in 1824 and published it for words and music in 1829; a math code followed by 1838.