Abstract. Multi Robot Systems are, nowadays, an important research area within Robotics and Artificial Intelligence. Although Multi Robot Systems can be regarded as a particular case of Multi Agent Systems, it seems appropriate to study the Multi Robot Systems from a specific viewpoint, because of the issues which arise from the embodiment of agents operating in real environments. In this paper, we present an analysis of Multi Robot Systems by looking at their cooperative aspects. In particular, we propose a taxonomy of Multi Robot Systems and a characterization of reactive and social deliberative behaviors of the Multi Robot System as a whole. Finally, we address some Multi Robot Systems, which we consider representative of the various nodes in our taxonomy.

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The SPQR (Soccer Player Quadruped Robots, but also Senatus PopolusQue Romanus) team participated for the second time to Sony Legged League in RoboCup 2001. This work is a team description where it will be highlighted what the team development effort focused on: the realization of a motion module, the realization of a vision module and the improvement of the plans which characterize the different robot roles.