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All about Multi Touch: How to build your on Multi Touch Table and how to improve it. Advancements in HCI offer opportunities for the construction of low cost multi-touch displays. These display, capable of sensing fingers, hands, and whole arms, can be constructed from readily available components. Although this work has been presented in an academic setting, the steps involved in building a high quality FTIR enabled surface, on a software and hardware level, are not trivial. contact: j.schoening@uni-muenster.de