VMS Help CMS, DELETE, HISTORY, Qualifiers, /CONFIRM (D)  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Controls whether CMS prompts you for confirmation before each
    transaction.

    When you run CMS in interactive mode, CMS prompts you for
    confirmation. If you type YES, ALL, TRUE, or 1, CMS executes the
    transaction. If you type NO or QUIT or press RETURN, no action
    is performed. If you type any other character, CMS continues to
    prompt until you type an acceptable response.

    CMS does not prompt for confirmation in batch mode.