A new technology, which the authors see developing in the mental health field, is viewed as a consequence of urbanism with its varied societal manifestations. A major part of this technology is the ability to invent special social prostheses and to assemble them into a spectrum of services which represent various levels of intervention: (1) casefinding; (2) outpatient care; (3) partial inpatient care; and (4) total inpatient care. These are described in terms of the persons they should serve. The remainder of the paper deals with the continuity in patient care which would ideally be the coordination of all mental health resources. It is defined as having the right kind of care at the right time. Two dimensions are considered: (1) the relations between organizations; and (2) articulating roles within and between organizations. Sources of resistance to collaboration among services are mentioned. A sanction to mandate such collaboration must come from some community power center. Criteria for coordination and the importance of evaluation are discussed. (TL)