This book constitutes the refered proceedings of the 9th International Conference on Software Reuse, ICSR 2006, held in Torino, Italy, in June 2006.

The 27 revised full papers and 13 revised short papers presented were carefully reviewed and selected from noumerous submissions. The papers are organized in topical sections on COTS selection and integration; product lines, domain analysis, and variability; reengineering maintenance; programming languages and retrieval; aspect-oriented software development; approaches and models; and components.