Pragmatic information,understood as the impact of a message upon a receiving system,represents a matured and comprehensive concept of which earlier proposals are special cases.The di .erent kinds of recipients and reactions to incoming message are characterized.In a historical exposition the principal approaches to the definition and operationalization of information are critically reviewed. From a modern point of view,the measurement of pragmatic information is possible but requires novel and specific procedures.As a perspective notion,pragmatic information will be analyzed in its relationships with (...) other perspective notions,particularly 'meaning' and 'interpretation '.Main fields of application include physics, general systems theory and cognitive science.Together with some reflections on information and meaning, these areas of application point forward to connections with the mind-matter problem. (shrink)