Library /sys$common/syshlp/HELPLIB.HLB
CRTL, toupper, Description
 *Conan The Librarian 

    If the argument represents a lowercase letter, and there is
    a corresponding uppercase letter, as defined by character
    type information in the program locale category LC_CTYPE, the
    corresponding uppercase letter is returned.

    If the argument is not a lowercase character, it is returned
    unchanged.
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