Research on Engineering Applications in Multidisciplinary Sectors presents a concise yet wide-ranging collection of contemporary research and practical innovations across engineering, technology, and applied sciences. The book highlights how data science, machine learning, smart materials, cryptography, environmental engineering, automation, and digital transformation are being applied to solve real-world global challenges. By blending theoretical foundations with case studies and experimental results, it offers a clear view of both emerging trends and practical implementations across sectors such as smart cities, sustainable manufacturing, healthcare, supply chains, and information security. Key Features: Integrates multidisciplinary engineering and computing approaches Applies data-driven and AI-based methods to real-world problems Analyses sustainable materials, smart systems, and digital transformation Presents case studies, surveys, and comparative research insights Addresses societal, environmental, and technological challenges