VMS Help SET, TERMINAL, Qualifiers, /LOWERCASE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /LOWERCASE
       /NOLOWERCASE

    Controls whether lowercase characters are passed to the terminal.
    The /NOLOWERCASE qualifier translates all input to uppercase. The
    /LOWERCASE qualifier is equivalent to the /NOUPPERCASE qualifier.