Chapter 5 addresses these weaknesses by combining STS with sociological systems theory, which provides a persuasive account of law in society, but has been criticised as technology-blind. This does not mean, however, that systems theory lacks the means to conceptualise the interface between the materiality of a distribution medium (e.g. the Internet) and the sociality of communicative systems (e.g. law), since structural coupling provides the means to explain how operatively closed systems can relate to each other, e.g. the sphere of technical materiality (the technosystem) and the sphere of communicative sociality (society and its subsystems). A separation between the material and the social is the prerequisite for adopting a critical or normative position vis-à-vis digital media, enabling us to empirically study the diverse interrelations between the two spheres in online communication. To do so, technologies must be understood as artefacts possessing affordances, that is possibilities and constraints, raising the question of how digital technologies acquire affordances. The final question concerns the concept of normativity in the digital ecosphere, namely whether normative expectations about digital technologies can emerge. Since normative expectations structure the legal system, our answer will explain the nature of the structural coupling between law and technology.