: How are social relations appearing in computers? How are social relations realised in a different kind of medium, in the hardware and software of computers? How are the organising principles of computer building related to those of the life-worlds in a social system? Following a partly social constrnctivist and partly hermeneutic line a more general answer will be presented. The basic conclusion of this approach is simple: computers are constructed under the influence of the ideas of modernity and represent its structure, interests and values, in contrast to computer networks, which embody the ideas of postmodernity.