BUFFERED

 Indicates run-time library behavior following WRITE operations.  It
 takes the following form:

 BUFFERED = bf

 bf   Is a character expression with one of the following 
      values:

      'NO'   Requests that the run-time library send output
             data to the file system after each WRITE
             operation.

      'YES'  Requests that the run-time library accumulate
             output data in its internal buffer, possibly
             across several WRITE operations, before the data
             is sent to the file system.  

             Buffering may improve run-time performance 
             for output-intensive applications.

 The default is 'NO'.

 On OpenVMS, BUFFERED has no effect.  The operating system
 automatically performs buffering, which can be affected by the
 values of the BUFFERCOUNT and BUFFERSIZE keywords when the file is
 opened.