Interdisciplinary business information experts contribute chapters on information and technology for competitive technology (CI)—the strategic collection and analysis of information about competitors, customers, and trends. Vriens (knowledge and information management, U, if Nijmegen) edits 12 chapters including linking competitive intelligence and intranets, using web link analysis to detect and analyze hidden web communities, a framework for business performance management, using geographical information systems for CI, and using groupware to build a scenario-based early warning system. Most of the contributions are from the U. of Nijmegen, The Netherlands.