The term 'grey media' denotes those tools and carrier media that are involved in practices of administration. They range from paper to files to their digital successors like SAP systems. Grey media are pervasive. We are constantly surrounded by them. Yet, they tend to withdraw themselves from attention. They are “rarely recognized or explored as media in their own right” (Fuller/Goffey 2012: 1). I study the way business-management software eats itself into the day-to-day matters of administration and how it gets entangled with the other 'older' media of the heterogeneous information infrastructure.