Squirt was the name of a prototype autonomous robot built at MIT in 1989. At the time it was the smallest robot ever built, coming in at just over 1 cubic inch. Using strictly off-the-shelf components, Squirt incorporated an 8-bit computer, an on-board power supply, three sensors and a propulson system, though the only movements it could perform were forward and back-and-turn using one motor and a clutch in the rear axel. It was programmed to "hide" in dark corners, only coming out at the approach of a noise. It was succeeded by Goliath an even smaller robot, and, later, by the Ants series of robots. Squirt is pictured in Mobile Robots: Inspiration to Implementation.