ETAPS2008wasthe11thinstanceoftheEuropeanJointConferencesonTheory and Practice of Software. ETAPS is an annual federated conference that was established in 1998 by combining a number of existing and new conferences. This yearit comprised?ve conferences (CC, ESOP,FASE, FOSSACS, TACAS), 22satelliteworkshops(ACCAT,AVIS,Bytecode,CMCS,COCV,DCC,FESCA, FIT, FORMED, GaLoP, GT-VMT, LDTA, MBT, MOMPES, PDMC, QAPL, RV,SafeCert,SC,SLA++P,WGT,andWRLA),ninetutorials,andseveninvited lectures (excluding those that were speci?c to the satellite events). The ?ve main conferences received 571 submissions, 147 of which were accepted, giving an overall acceptance rate of less than 26%, with each conference below 27%. Congratulationsthereforetoallthe authorswhomadeittothe ?nalprogramme! I hope that most of the other authors will still have found a way of participating in this exciting event, and that you will all continue submitting to ETAPS and contributing to make of it the best conference in the area. The events that comprise ETAPS address various aspects of the system - velopment process, including speci?cation, design, implementation, analysis and improvement. The languages, methodologies and tools which support these - tivities are all well within its scope. Di?erent blends of theory and practice are represented, with an inclination towards theory with a practical motivation on the one hand and soundly based practice on the other. Many of the issues involved in software design apply to systems in general, including hardware s- tems, and the emphasis on software is not intended to be exclusive.

This volume contains the proceedings of the 14th International Conference on ConcurrencyTheory(CONCUR2003)heldinMarseille, France, September3-5, 2003. The conference was hosted by the UniversitedeProvenceandtheLa- ratoire d'Informatique Fondamentale de Marseille (LIF). The purpose of the CONCUR conferences is to bring together researchers, developers, and students in order to advance the theory of concurrency, and promote its applications. Interest in this topic is continuously growing, as a consequence of the importance and ubiquity of concurrent systems and their applications, and of the scienti?c relevance of their fundations. The scope of the conference covers all areas of semantics, logics, and veri?cation techniques for concurrent systems. Topics include concurrency-related aspects of: models of computation and semantic domains, process algebras, Petri nets, event struc- res, real-time systems, hybrid systems, decidability, model-checking, veri?cation and re?nement techniques, term and graph rewriting, distributed programming, logic constraint programming, object-oriented programming, types systems and algorithms, case studies, and tools and environments for programming and - ri?cation. Of the 107 papers submitted this year, 29 were accepted for presentation. Four invited talks were given at the conference: on Distributed Monitoring of Concurrent and Asynchronous Systems by Albert Beneveniste, on Quantitative Veri?cation via the MU-Calculus by Luca De Alfaro, on Input-Output Au- mata: Basic, Timed, Hybrid, Probabilistic, Dynamic, . . . by Nancy Lynch, and on Composition of Cryptographic Protocols in a Probabilistic Polynomial-Time Process Calculus by Andre Scedrov."