origin = ( 1.75,4.25 )
	cht = 1.1*cht; cwid = 1.25*cwid;
	ellipse 'document'
	arrow
	box 'PIC'
	arrow
	box 'TBL/EQN' '(optional)' dashed
	arrow
	box 'TROFF'
	arrow
	ellipse 'typesetter'