Many clips of different things. Among them are a computer display of some kind of geometric or field calculation, a simulation of different-size (and mass) balls colliding with a complex environment and each other under gravity, Ray Solomonoff talking, someone on a bongo board, Rick Greenblatt talking, Marvin Minsky and a student watching a robot arm stacking blocks, students watching a different arm accidentally knocking over a tower of blocks, Alan Kotok, Stuart Nelson and others in front of the PDP-6, Lucy (Marvin Minsky's secretary) sitting on the Minsky-Bennett arm and riding around, some kind of grasping mechanism being demonstrated and a brief screen recording of what looks like Terry Winograd's SHRDLU.