This book is structured into seven parts, each focusing on a distinct set of principles, methods, and practices within software engineering. Part I introduces the foundational concepts of the discipline and offers an overview of the Unified Modeling Language (UML), a standard notation for modeling software systems. Part II covers requirements engineering, emphasizing the difference between what a system is ex-pected to do and the assumptions made about its environment. Part III focuses on designing effective and maintainable software architectures. Part IV addresses the techniques for verifying and validating software to ensure it is correct, reliable, and fit for purpose. Part V explores the tools, methodologies, and infrastructure that support software construction, deployment, maintenance, and evolution. Part VI presents a range of established approaches to managing software engineering processes and addressing their many dimensions. Part VII concludes with a forward-looking discussion on emerging trends and open challenges shap-ing the future of software engineering.