This thesis deals with the utilization of large screens to support collaboration. An introduction to the topic leads to a research question which is divided into three sub questions. Each of these is addressed through an individual research paper. The first paper documents a literature survey and presents an overview of the field within Single Display Groupware and offers a resource for practitioners to consult when designing a system utilizing large screens. The second paper presents a quantitative experiment on touch sensitive displays. This shows large screen touch sensitive displays to afford an advantage in completion time. The third paper presents an empirical study of coordination mechanisms as employed at a hospital ward. This conceptual design is evaluated through a focus group interview. We conclude that coordination mechanisms have served us well as a tool to capture important collaborative practices in this case. Our overall conclusion is that large screen interfaces have the potential to support collaborative practices within communities of work, and that this may serve as collaborative support tool.