"# Macrosocial systems. These include systems in communities and industrial sectors, and institutions operating at the overall level of a society. They constitute what I have called "domains". (Trist, 1976a; 1979a). One may regard media as socio-technical systems. McLuhan (1964) has shown that the technical character of different media has far-reaching effects on users. The same applies to architectural forms and the infrastructure of the built environment. Although these are not organizations, they are socio-technical phenomena. They are media in Heider's (1942) as well as McLuhan's sense."