Braille Cell

Braille is a combination of raised dots that is used by blind and visually impaired people to read and write. It was named after Louis Braille in 1829. Braille consists of cells of 6 raised dots arranged in a grid of two dots horizontally by three dots vertically. The positions of the dots are numbered 1 to 3 from top to bottom on the left, and 4 to 6 from top to bottom on the right.

(Image from Wikipedia)

BRAILLE ALPHABET

The different combinations of the dots form letters and numbers. For example, the letter A is dot 1. The letter M is dots 1-3-4. The letter T is dots 2-3-4-5.

(Image from The Canadian National Institute for the Blind)

Braille Numbers
Braille numbers are made using the first ten letters of the alphabet, "a" through "j", and a special number sign, dots 3-4-5-6.

(Image from The Canadian National Institute for the Blind)