IoT: Architecture, Technologies and Applications provides a comprehensive introduction to the concepts, architecture, communication technologies, hardware platforms, cloud integration, security, and real-world applications of the Internet of Things (IoT). Written in a clear and learner-friendly style, the book combines theoretical foundations with practical examples, case studies, diagrams, and emerging trends such as AIoT, Edge Computing, and Digital Twins. Designed for undergraduate and postgraduate students, educators, and technology enthusiasts, this textbook serves as a valuable resource for understanding and developing modern IoT solutions.