Previous workshops and papers have examined how individual users adopt and adapt technologies to meet their own local needs, by “completing design through use.” However, there has been little systematic study of how groups of people engage collaboratively in these activities. This workshop opens a discussion for these under-studied forms of collaborative appropriation, using a broad range of perspectives including empirical data, design explorations, research, and critique. Author Keywords Appropriation; Adoption; Adaptation; Collaboration; CSCW. ACM Classification Keywords H.5.3. Group and Organizational Interfaces.