With the increased dissemination of information technologies in education, the issue of how learners deal with multimedia information systems has become critical. New research questions have emerged such as: How well do people learn from multimedia documents? How do they achieve integration between text and any other media? How can you make computerized information systems fit user information processing strategies and styles? And what is the potential of hypermedia applications for education, training and work? This volume is based on a selection of papers presented at the first International Seminar on Using Complex Information Systems held in Poitiers, France. The volume presents an overview of research issues related to multimedia usage considered from cognitive and instructive perspectives. It relates theories of mental representations, information processing and learning to issues of design and use of multimedia technologies.