the 1982 ACM SIGGRAPH conference, Martin Newell donated his original teapot to Oliver Strimpel, wryly noting the symbolism of one Englishman giving another Englishman a teapot to be preserved and displayed a stone's throw from the site of the Boston Tea Party revolt of 1773. The exhibit displayed Allan Newell's original ceramic teapot alongside an Adage frame buffer display of a Bézier model of it, both responding interactively to changes in lighting selected by museum visitors with switches. Computer animation An animation theater performed a program of pioneering computer-animated shorts, including several from Pixar, such as Luxo Jr. Smart Machines (1987) A permanent gallery devoted to the history and technology of artificial intelligence and robotics opened in 1987. Knowledge-based systems Interactive exhibits focused on expert systems. Examples included a medical diagnosis system, a simple rule-based simulated bargaining store-keeper with whom visitors haggled over the price of a crate of strawberries, a computer composition system, and a system that plays tic-tac-toe according to a visitor-selected strategy. Natural language understanding Visitors could sit at computers and ask questions of ELIZA, the automated psychotherapist that was noteworthy because despite its basic rule-based behavior, users became deeply engaged with it. In an interactive video disk system, visitors were invited to analyze the computer HAL's natural language capability in an excerpt of the Stanley Kubrick film 2001: A Space Odyssey. Robot sensing Museum visitors could interact with four robot sensing modalities: vision, hearing, touch, and sonar. Vision: after arranging a set of simple shapes on a board, a vision system attempted to recognize them using edge detection. Hearing: this was exemplified by a speech recognition system. Touch: visitors touch a pressure-sensitive pad that outputs the distribution of pressure under their figures onto a display. Sonar: a ceiling-mounted sensor measured a visitor's height by bouncing a signal off the top of the head. Robot Theater A collection of robots were arrayed inside a theater, each of which, when highlighted in the theater's video program, lit up and, in several cases, performed movements. Mobile robots included: Shakey, Prototype Mars Rover, the Stanford Cart, the quadruped Titan III from the Tokyo Institute of Technology, and a Denning Mobile Robot; robot arms included Unimate I, the Rancho and Stanford Arms and Orm from Stanford, the Direct Drive Arm-1 from Carnegie Mellon University, and the Tentacle Arm from MIT. The Walk-Through Computer (1990, 1995) A two-story-high model of a personal