The increasing performance of mobile devices, such as PDAs and smart cards, allows for the efficient use of mobile database technology within the framework of comprehensive integration of mobile applications into existing heterogeneous systems. Characteristics of the mobile environment, as well as limited physical resources of mobile devices, impose specific requirements on the architecture and implementation of mobile database systems. The book provides a solid introduction to generic architectures and concrete implementation concepts, as well as an overview of existing technologies and concepts. Central topics include specific and classical replication methods and their suitability in the mobile environment, mobile transaction models, special implementation concepts for pico-database systems, particularly efficient storage concepts, and methods of query execution. Based on commercially available solutions.