Software engineering and the language Ada are playing a major role in the development of software and software technology for the new century. The11th Ada Europe conference shows that Ada has matured from a language, mainly of researchers and academics in the early 1980s, into a full-grown tool in software engineering practice. This volume contains a selection of contributions to the conference. They demonstrate that Ada is very beneficially used in many software development projects and is gradually becoming accepted on the scale it deserves. Papers have been selected that show that Ada is indeed ripened in all aspects of software engineering. A variety of topics is addressed: management, economics, practical experiences, numerics, and the use of Ada for real-time and distributed systems.