This Handbook is the first volume of the International Handbook on Information Systems. It offers a comprehensive overview of architectures, languages, methods, and techniques for modelling and analysing information systems in organisations. The contributions are written by authoritative figures in this area. Numerous approaches are surveyed coming from computer science, information systems, and business administration among others. This volume brings together more than 30 contributions in order to provide a reference source for problem solvers in business, industry, and government, and which can be used by professional researchers and graduate students. In the new edition, all contributions have been revised completely. New papers have been added on XML and UML.