Computer Braille Code
Computer Braille is an adaptation of braille to an eight-dot cell; the resulting 256 characters match in number the 256 characters of ASCII computer coding. Unfortunately, an eight-dot cell is too large to be read easily, negating one of the principal advantages of braille, and it was abandoned in Unified English Braille, adopted in most English-speaking countries apart from the United States.
One quarter of Computer Braille characters are the 64 of standard braille. Capital letters are derived by adding dot 7:
| Source letter: |  a
|
 b
|
 d
|
 k
|
 l
|
 y
|
|---|---|---|---|---|---|---|
| Derived letter: |  A
|
 B
|
 D
|
 K
|
 L
|
 Y
|