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The User Interface distribution can also be applied on interactive tabletops which are connected and more or less remote. This distribution raises issues which concern collaboration (how to distribute the UI to collaborate?); besides, concerning the tangible interaction: which role and appearance (tangible or virtual) must have the objects? In this chapter we describe an extended context model in order to take into account both interactions on a single interactive tabletop and interactions which are distributed and collaborative. The model proposed can, from our point of view, be used to make sure that the usability of the interaction is guaranteed. Indeed, it is essential to know the interaction configuration in order to ensure the usability of the system. The model suggested is illustrated in a case study integrating collaboration and UI distribution. A conclusion gives the limits of the article before a presentation of …