Her research in CSCW began after completing her PhD, when she became frustrated with the single user information processing paradigm that had dominated HCI research. In 1991 she spent 6 months at UCSD as a visiting scholar and worked with Ed Hutchins in the Distributed Cognition Lab. Since then she has carried out a number of field studies, trying to understand and explain a variety of collaborative work practices. This year she was a visiting professor at Stanford University and Apple Research Labs where she was involved in designing future collaborative technologies. She may be reached at: yvonner@cogs.susx.ac.uk.