/sys$common/syshlp/helplib.hlb SET, TERMINAL, Qualifiers, /APPLICATION_KEYPAD  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies that the keypad is to be set to application keypad
    mode, which allows you to enter DCL commands defined with the
    DEFINE/KEY command. By default, the terminal is set to numeric
    keypad mode.