The dialect cluster Taa (also known by the term !Xoon a.k.a. "!Xóõ") can be characterized as the last vital language of the Tuu (a.k.a. Southern Khoisan) family and is spoken by a socially and economically marginalized group of ca. 4000 people. The present project followed a first phase which was restricted to the Namibian varieties, West !Xoon and 'N|ohan, both of which had previously not been subject to in-depth research and documentation. While the linguistic differences between the two varieties turned out to be much greater than expected, the two speech communities are today heavily intermingled and depend socio-politically on each other in many ways. A reasonable analysis of Namibian Taa and a full understanding of the recorded data are only possible if the documentation includes the Taa communities in Botswana, at least in the form of a survey. The second project phase of two years, which started in August 2007, dealt with this topic, in addition to further work on the Namibian varieties. The linguistic work gave special emphasis to the identification of click parameters, the tonal system, semantic and morpho-syntactic aspects of noun classification, and serial verb constructions. Anthropological research focusedon ethno-history, cultural mapping including land use and subsistence patterns, as well as selected aspects of social organization.