Shots of a cashier using a machine to update bank booklets. MCU of her hands at work, of the machine in operation. MCUs of a weather map being traced by an automatic computer-operated tracing machine. Shots of geometric designs, circuits forming and disappearing rapidly on the screen of a monitor. Shots inside a dark laboratory of a man testing a light projector, white light flashing against the camera lens. Shots of a laser's ruby light beam cutting across the darkness, striking a target and diffusing. Shots of a coherent light beam flashing in and out of the darkness. Shots of electronic signals on an oscilloscope screen, odd shapes in movement.