[...] part of technology design is precisely the art of making clear to the user what they can and cannot do with it. Technology design always involves both a closing off of the technology's innards into a "black box" and the projection of messages on its outer surface that will guide the user into successful operation of the artefact. There is a concealed politics here, akin to statecraft. How technological artefacts are presented to users involves a politics of design that reflects features of the social content. It is here that we find the politics of the relationship between technology and social power. [...]