Project: ModelAge is an ESPRIT Basic Research Working Group focused on establishing a common formal model of the concept of agent. ModelAge is divided into specialist groups: SG1: Defeasibility of agent facets, SG2: Logics and models of action,SG3: Norm-governed interaction in organizations, SG4: Software Development Process, and SG5: Diagnosis, Repair and Industrial Control. 5/9/96