This volume is devoted to the 10th Anniversary Colloquium of UNU/IISI, the International Institute for Software Technology of the United Nations University, as well as to the memory of Armando Haeberer, who passed away while he was working on the preparation of this book in February 2003.

The volume starts with a special paper by Tom Maibaum recollecting Armando Haeberer's life and work. The second part presents work done by members of UNU/IISI as well as a paper on the history of the institute. The subsequent topical sections present key contributions by leading researchers and thus assess the state of the art in software engineering and its engineering and scientific principles, from models to software, real-time systems, and verification. All in all, the book is a unique survey of the power and potential of formal methods in software engineering.