-
Dots-based
characters
- Linear arrangements of 63 characters for handling 2D print
arrangements (a2) and large variety of symbols (‘dd’, ‘4’, and
‘.’).
- Many Braille conventions for different subject matters and
different languages.
- Nemeth braille is used for math in the USA
- Translation of a textbook: at least 6 months and $6,000
- 23 categories of mathematics, sciences, and engineering in
the library of Congress catalog: more than 160,000
publications, only 55 in braille.
- 74% of working age blind people are unemployed
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