This book contains the refereed proceedings of the Third Scandinavian Conference on Information Systems (SCIS), held in Sigtuna, Sweden, in August 2012.The digitization of modern society's information and communication structures has fundamentally changed our everyday life, economy, business, and society. How can information systems research as an academic yet pragmatic discipline contribute to designing the interactive society? The Scandinavian IS tradition with its emphasis on engaged scholarship, action research, and socially embedded design has a lot to contribute to this discussion. The 10 papers accepted for presentation at the conference were selected from 33 submissions, and they are grouped into two main themes: the interactive society and design.