Many ubiquitous computing scenarios deal with cooperative work situations. To successfully support these situations, computer-supported cooperative work (CSCW) concepts and technologies face new challenges. One of the most fundamental concepts for cooperation is sharing. By analyzing applications of sharing in the context of ubiquitous computing it can be shown that ubiquitous computing enables an extended view on sharing. In this paper, we show that this extended view seamlessly integrates the view of "traditional" CSCW and additionally incorporates ubiquitous, heterogeneous, and mobile devices used in a common context.