Meaning of ALPHANUMERIC in English
< character > A decimal digit or a letter (upper or lower case). Typically, "letters" means only English letters ( ASCII A-Z plus a-z) but it may also include non-English letters in the Roman alphabet, e.g., e- acute , c- cedilla , the thorn letter , and so on. Perversely, it may also include the underscore character in some contexts.
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012