As a youth in the DOS era, I was always enamored of fonts like OCR-A, there is some overlap between the problems of "make it easy to distinguish" and "make it hard to maliciously corrupt", although I can imagine some cases where they might be in conflict, especially if adding ink is asymmetrically easier than removing or covering it.https://en.wikipedia.org/wiki/OCR-A
schiffern|2 days ago
https://en.wikipedia.org/wiki/Chinese_numerals#Financial_num...