Braille

Braille

Braille is the name of a system of writting with a series of small raised bumps used for the blind. The bumps are arranged in a cell 2 wide and 3 high for the main alphabetic characters.

A      B      C

o .    o .    o o 
. .    o .    . .
. .    . .    . .

Here the circles are the raised areas.