Silicon Valley is a unique place in a unique moment of time. To say that it exists within history seems obvious; what might be less apparent is that Silicon Valley also has come to define both the practice and the subject of history. History and the exciting technologies born and bred in Silicon Valley are intimately linked. These ties were highlighted in a remarkable series of events and presentations sponsored by the Center for Science, Technology, and Society (CSTS) in October 2001. This issue of STS NEXUS captures the insights of those presentations.