The s-bot is a small (15 cm) ifferential wheeled (with additional tracks) mobile robot developed at the LIS (Laboratory of Intelligent Systems ) at the EPFL in Lausanne, Switzerland between 2001 and 2004. Targeted to swarm robotics, a field of artificial intelligence, it was developed within the Swarm-bots project, a Future and Emerging Technologies project coordinated by Prof. Marco Dorigo. Built by a small team of engineers (Francesco Mondada, André Guignard, Michael Bonani and Stéphane Magnenat of the group of Prof. Dario Floreano and with the help of student projects, it is considered at the time of completion as one of the most complex and featured robots ever for its size. The s-bot was ranked on position 39 in the list of “The 50 Best Robots Ever” (fiction or real) by the Wired magazine in 2006.