Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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  isalnum   iscntrl   islower   isspace     toascii    toupper
  isalpha   isdigit   isprint   isupper     tolower   _toupper
  isascii   isgraph   ispunct   isxdigit   _tolower
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