The CSCW conference is celebrating its 20th birthday. This is a perfect time to analyze the coherence of the field, to examine whether it has a solid core or sub-communities, and to identify various patterns of its development. In this paper we analyze the structure of the CSCW conference using structural analysis of the citation graph of CSCW and related publications. We identify the conference’s core and most prominent clusters. We also define a measure to identify chasm-papers, namely papers cited significantly more outside the conference than within, and analyze such papers. Categories and Subject Descriptors K.4.3 [Computers and Society]: Organizational Impacts – Computer-supported collaborative work. H.5.3 [Information Interfaces and Presentation]: Group and Organization Interfaces – Computer-supported cooperative work General Terms: Measurement, Theory