One raised dot equates to the letter "A" ; see related link to additional information concerning Braille .
The letter A in braille uses a single dot in the upper left corner of the braille cell. All other braille letters use 2 or more dots.
There are 256 possible combinations of dots in 8-dot braille (if you include a blank cell as a character).
1824
Braille
26
The single dot in braille represents 'A'
a single dot
The letter A in braille uses a single dot in the upper left corner of the braille cell. All other braille letters use 2 or more dots.
There are 256 possible combinations of dots in 8-dot braille (if you include a blank cell as a character).
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1824
Braille
26
The letter b in Braille is represented by 1,2 - that is, a dot in the top left and middle left cell.
(*As it is difficult to write out the dot forms in text, see the related link for Braille translations.)
Braille
dot system