F. S. HILL, JR., is Professor of Electrical and Computer Engineering at the University of Massachusetts-Amherst. He received a Ph.D. degree from Yale University in 1968, worked for three years in digital data transmission at Bell Telephone Laboratories, and joined the University in 1970. He is the author of numerous articles in the field of signal processing, communications, and computer graphics. He has co-authored an introductory book on engineering as well as authoring his second book on computer graphics. Francis S Hill, Jr., has won several awards for outstanding teaching.