This Dialogue is lifted out of an article by Terry Winograd on his program SHRDLU: only a few names have been changed. In it. a program communicates with a person about the so-called "blocks world" in rather impressive English. The computer program appears to exhibit some real understanding - in its limited world. The Dialogue's title is based on Jesu, joy of Mans Desiring, one movement of Bach's Cantata 147.