Library /sys$common/syshlp/helplib.hlb  —  FORTRAN  Statements  INQUIRE  BUFFERED
  BUFFERED = bf

  bf   Is a scalar default character variable that is assigned
       one of the following values:

       'NO'         If the file or unit is connected and
                    buffering is not in effect.

       'YES'        If the file or unit is connected and
                    buffering is in effect.

       'UNKNOWN'    If the file or unit is not connected.
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