General Terms

Over the last few years, there has been a significant increase in the number of researchers dealing with the integration of paper and digital information or services. While recent tech-nological developments enable new forms of paper-digital integration and interaction, some of the original research on interactive paper dates back almost twenty years. We give a brief overview of the most relevant past and current in-teractive paper developments. Then, based on our experi-ence in developing a wide variety of interactive paper so-lutions over the last decade, as well as the results of other research groups, we outline future directions and challenges for the realisation of innovative interactive paper solutions. Further, we propose the definition of common data formats and interactive paper design patterns to ensure future cross-application and framework interoperability. Author Keywords Interactive Paper, Augmented Paper, Paper-Digital Interface