Technology has become a key vehicle and index of the societal impact of science. Technology’s dominant image, both in science and technology studies (STS) and in science policies, is one of a material device or a complex procedure using machines with origins in natural science disciplines. This article inquires into the vehicles and forms of societal impact in the case of the social sciences. It empirically looks into the generation and circulation of knowledge and expertise on Roma and, drawing upon Strathern, follows three types of vehicles: projects, products, and persons. In the conclusion it argues against the asymmetrical treatment of the social and natural sciences or social and material technologies, and suggests that the troubles the social sciences have with accounting for their societal impact are comparable to effects of critical evaluation of the natural sciences and should be seriously considered as exposing more general challenges for science in a knowledge society.