Foundations of Software Science and Computation Structures : 5th International Conference FOSSACS 2002 Held as Part of the Joint European Conferences on Theory and Practice of Software ETAPS 2002 Grenoble France April 8–12 2002 Proceedings This book constitutes the refereed proceedings of the 5th International Conference on Foundations of Software Science and Computation Structures FOSSACS 2002 held in Grenoble France in April 2002.The 28 revised full papers presented together with an extended abstract of an invited paper were carefully reviewed and selected from a total of 67 submissions. Among the topics addressed are algebraic categorical logical and geometric theories models and methods which support the specification synthesis verification analysis and transformation of sequential concurrent distributed and mobile programs and software systems