American and European programmers are often surprised to discover that not all locales use a two-case alphabet. Eastern languages (e.g., Japanese and Chinese) based on ideograms are monocase; while Middle Eastern languages can have four or more cases.
Source: wiktionary
Dine 1 is a ‘monocase’ font that consists of a combination of uppercase and lowercase letters. It was designed that way to provide each letter character with a distinct shape without compromising any meaning associated with that shape.
Source: wiktionary
The program prompts for the old password (if any) and then for the new one (twice). The caller must supply these. New passwords should be at least four characters long if they use a sufficiently rich alphabet and at least six characters long if monocase. Only the first eight characters of the password are significant.
Source: wiktionary
The Standard chose to stay with the old restrictions on these external names: they are not guaranteed to be different unless they differ from each other in the first six characters. Worse than that, upper and lower case letters may be treated the same! […] There is nothing to prevent any specific implementation from giving better limits than these, but for maximum portability the six monocase characters must be all that you expect.
Source: wiktionary