VAL	Function which converts a string into its numeric
	equivalent. The string is examined up to the first
	non-numeric character, so a string not beginning
	with a number is given a value of 0.
VDU (V.)	A general purpose command producing various
	effects on the screen display.
VPOS (VP.)	Give the current y coordinate of the text cursor.
WIDTH (W.)	Set the width of all subsequent lines of output.
App 6.9