This paper describes an implementation of the 3 T robot architecture which has been under development for the last eight y ears. The architecture uses three levels of abstraction and description languages which a r e compatible between levels. The makeup of the architecture helps to coordinate planful activities with real-time behaviors for dealing with dynamic environments. In recent y ears, other architectures have been created with 1 similar attributes but two features distinguish the 3 T a

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... c hitecture: 1) a variety of useful software tools have been created to help implement this architecture on multiple real robots and 2) this architecture, or parts of it, have been implemented on a variety o f v ery di erent robot systems using di erent processors, operating systems, e ectors and sensor suites.