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This book constitutes the proceedings of the 18th International Conference on Software and Systems Reuse, ICSR 2019, held in Cincinnati, Ohio, USA in June 2019.

The 13 research papers included in this book were carefully reviewed and selected from 32 submissions. In addition, 3 industry innovation papers are included. The papers were organized in topical sections named: software reuse practice; software product line and requirements reuse; reuse and design and evolution; intelligent software reuse; and domain-specific software development.

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Software Reuse Practice.- A Flexible and Efficient Approach to Component Test in Time-Critical Scenarios.- Software Product Line and Requirements Reuse.- Extending FragOP Domain Reusable Components to Support Product Customization in the Context of Software Product Lines.- Towards a Software System for Facilitating the Reuse of Business Processes.- Automated Support to Capture Creative Requirements via Requirements Reuse.- A Comparative Analysis of Game Engines to Develop Core Assets for a Software Product Line of Mini-Games.- Reuse and Design and Evolution.- Behavioral Evolution of Design Patterns: Understanding Software Reuse through the Evolution of Pattern Behavior.- Developing a Flexible Simulation-optimization Framework to Facilitate Sustainable Urban Drainage Systems Designs through Software Reuse.- Automatically Extracting Bug Reproducing Steps from Android Bug Reports.- Intelligent Software Reuse.- Searching Software Knowledge Graph with Question.- SemiTagRec: A Semi-supervised Learning based Tag Recommendation Approach for Docker Repositories.- Slicing Based Code Recommendation for Type Based Instance Retrieval.- NLI2Code: Reusing Libraries with Natural Language Interface.- Domain-Specific Software Development.- A Double-Edged Sword? Software Reuse and Potential Security Vulnerabilities.- ACO-RR: Ant Colony Optimization Ridge Regression in Reuse of Smart City System.- An Improved Approach for Complex Activity Recognition in Smart Homes.- Examining the reusability of Smart Home applications: A Case Study on Eclipse Smart Home.

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