This volume contains the proceedings of AMAST 2004, the 10th International Conference on Algebraic Methodology and Software Technology, held during July 12 16,2004, in Stirling, Scotland, UK. The major goalof the AMAST c- ferences is to promote research that may lead to the setting of software techn- ogy on a ?rm, mathematical basis. This goal is achieved by a large international cooperationwith contributions from both academia and industry. The virtues of a software technology developed on a mathematical basis have been envisioned asbeing capableofprovidingsoftwarethatis(a)correct, andthecorrectnesscan be provedmathematically, (b) safe, so that it can be used in the implementation of critical systems, (c) portable, i. e., independent of computing platforms and language generations, and (d) evolutionary, i. e., it is self-adaptable and evolves with the problem domain. PreviousAMASTmeetingswereheldinIowaCity(1989,1991,2000), Twente (1993), Montreal (1995), Munich (1996), Sydney (1997), Manaus (1999), and Reunion Island (2002), and contributed to the AMAST goals by reporting and disseminating academic and industrial achievements within the AMAST area of interest. During these meetings, AMAST attracted an international following among researchersand practitioners interested in software technology, progr- ming methodology and their algebraic and logical foundations. For AMAST 2004therewere63 submissionsof overallhigh quality, authored by researchers from Australia, Canada, China, the Czech Republic, Denmark, France, Germany, India, Iran, Israel, Italy, Korea, Portugal, Spain, Taiwan, The Netherlands, Turkey, the UK, and the USA. All submissions were thoroughly evaluated, and an electronic programcommittee meeting was held to discuss the reviewers reports. The program committee selected 35 papers to be presented."

The goal of the AMAST conferences is to foster algebraic methodology as a foundation for software technology, and to show that this can lead to practical mathematical alternatives to the ad-hoc approaches commonly used in software engineering and development. The first two AMAST conferences, held in May 1989 and May 1991 at the University of Iowa, were well received and encouraged the regular organization of further AMAST conferences on a biennial schedule. The third Conference on Algebraic Methodology and Software Technology was held in the campus of the University of Twente, The Netherlands, during the first week of Summer 1993. Nearly a hundred people from all continents attended the conference. The largest interest received by the AMAST conference among the professionals extended to include the administration organizations as well. AMAST'93 was opened by the Rector of the University of Twente, followed by the Local Chairman. Their opening addresses open this proceedings, too. The proceedings contains 8 invited papers and 32 selected communica tions. The selection was very strict, for 121 submissions were received."

This volume contains papers presented at the BCS-FACS Workshop on Specification and Verification of Concurrent Systems held on 6-8 July 1988, at the University of Stirling, Scotland. Specification and verification techniques are playing an increasingly important role in the design and production of practical concurrent systems. The wider application of these techniques serves to identify difficult problems that require new approaches to their solution and further developments in specification and verification. The Workshop aimed to capture this interplay by providing a forum for the exchange of the experience of academic and industrial experts in the field. Presentations included: surveys, original research, practical experi ence with methods, tools and environments in the following or related areas: Object-oriented, process, data and logic based models and specifi cation methods for concurrent systems Verification of concurrent systems Tools and environments for the analysis of concurrent systems Applications of specification languages to practical concurrent system design and development. We should like to thank the invited speakers and all the authors of the papers whose work contributed to making the Workshop such a success. We were particularly pleased with the international response to our call for papers. Invited Speakers Pierre America Philips Research Laboratories University of Warwick Professor M. Joseph David Freestone British Telecom Organising Committee Charles Rattray Dr Muffy Thomas Dr Simon Jones Dr John Cooke Professor Ken Turner Derek Coleman Maurice Naftalin Dr Peter Scharbach vi Preface We would like to aeknowledge the finaneial eontribution made by SD-Sysems Designers pie, Camberley, Surrey."