This book constitutes the refereed proceedings of the 13th International Conference on Safe and Secure Software Reuse, ICSR 2013, held in Pisa, Italy, in June 2013. The 27 papers (18 full and 9 short papers) presented were carefully reviewed and selected from various submissions. The papers are organized in topical sections on feature modeling and variability analysis; reuse and testing; architecture and reuse; analysis for reuse; reuse and patterns, short papers, emerging ideas and trends.

The second edition of PASRO - Pascal for Robots includes some new aspects of the PASRO development within the last two years. Besides the PASRO implementation on other computers with the help of different Pascal compilers and operating systems, one significant new development has been the implementation of the PASRO concept in the programming language C. Therefore the second edition is divided into two major parts: A. The revised and little extended "old" PASRO description of the first edition based on Pascal. B. The new PASRO/C description based on C. Of course we know that the name "PASRO/C. is a contradiction in terms, but we chose it, in order to use the well known name PASRO in future. The additional author John Favaro is respon sible for the PASRO/C implementation and the des ription while Christian Blume designed the PASRO concept and implemented the original PASRO, together with Wilfried Jakob. Additional thanks are dedicated to Jan Schloen and Thomas Eppting, who helped us to implement PASRO/C. We would also like to thank all readers of the first edition, who sent us their comments and corrections. Amongst these, spe cial thanks to G. Macartney from the Queen's University of Bel fast."