Modelling -- Semantic Software Capability Profile based on Enterprise Architecture for Software Reuse -- Safety Patterns for SysML: What Does OMG Specify? -- A Hybrid Approach based on reuse techniques for Autonomic Adaptation of Business Processes -- Reusable Formal Models for Threat Specification, Detection, and Treatment -- Dynamic Reconfiguration Model of Cloud Composite Services Using Event-B -- Reuse in Practice -- 15 years of reuse experience in evolutionary prototyping for the defense industry -- CxDev: A Case Study in Domain Engineering for Customer eXperience Management -- Reengineering -- Modular Moose: A new generation of software reverse engineering platform -- DeepClone: Modeling Clones to Generate Code Predictions -- Analysing Microsoft Access Projects: Building a model in a Partially Observable Domain -- Recommendation -- Automated Reuse Recommendation of Product Line Assets based on Natural Language Requirements -- Learning to Recommend Trigger-Action Rules for End-User Development: A Knowledge -- Graph Based Approach -- AndroLib: Third-Party Software Library Recommendation for Android Apps -- Investigating the Impact of Functional Size Measurement on Predicting Software Enhancement Effort using Correlation-based Feature Selection Algorithm and SVR method -- How Does library Migration Impact Software Quality and Comprehension? An Empirical Study -- How Do Developers Refactor Code to Improve Code Reusability? -- An Exploratory Study on How Software Reuse is Discussed in Stack Over ow.

This book constitutes the proceedings of the 19th International Conference on Software and Systems Reuse, ICSR 2020, held in Hammamet, Tunesia in December 2020. Due to COVID-19 pandemic the Conference was held virtually. The 16 full papers and 2 short papers included in this book were carefully reviewed and selected from 60 submissions. The papers were organized in topical sections named: modelling, reuse in practice, reengineering, recommendation, and empirical analysis.