Library /sys$common/syshlp/helplib.hlb
FMS, /TEST, Qualifiers, /QUIET

 *Conan The Librarian

  /QUIET
  /NOQUIET (D)

  The  /QUIET  qualifier  invokes  the  Form  Driver's  quiet signaling
  mode.  Input  errors  cause  the  screen background to reverse rather
  than  ringing  the terminal bell. The /NOQUIET qualifier can be  used
  to specify that signaling is to use the terminal bell.
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