-.PP
-.BR N.B. :
-If you use the standard I/O library with the Benson-Varian you
-.B must
-do
-.IP
-setbuf(vp, vpbuf);
-.PP
-where
-.I vpbuf
-is declared
-.IP
-\fBchar\fR vpbuf[BUFSIZ];
-.PP
-otherwise the standard I/O library, thinking that the Benson-Varian
-is a terminal (since it is a character special file) will not adequately buffer
-the data you are sending to the Benson-Varian.
-This will cause it to run
-.B extremely
-slowly and tend to grind the system to a halt.