HARRY COLLINS Department of Sociology, University of Southampton GILLIAN HARDSTONE CENTRIM, University of Brighton JOANNE HARTLAND School of Social Science, University of Bath ROBERT HOFFMAN Department of Psychology, Adelphi University, New York, USA JOHN HOWELLS Department of Business and Management, Brunel University DONALD MACKENZIE Department of Sociology, University of Edinburgh MAUREEN MCNEIL Department of Cultural Studies, University of Birmingham ROB PROCTER Department of Computer Science, University of Edinburgh PAOLO SAVIOTTI Universite Pierre Mendes-France JACKY SENKER Science Policy Research Unit, University of Sussex NIGEL SHADBOLT Department of Psychology, Nottingham University GRAHAM SPINARDI RCSS, University of Edinburgh