[The finalization of the information output].

A biological specimen bank, as a support to prospective studies on etiology of chronic diseases can be considered the final product of our research and the central point of an information system in which many participants are involved. After a brief consideration of some problems related to the criteria and the methodologies evaluation of scientific results and about their transfer to the users, the afferent and efferent informative flows are analysed using the bank as a central processing unit. The aim is to realize an interactive bidirectional communication process involving both the observer and the observed.