This book offers a clear and practical introduction to the Internet of Things, guiding readers from fundamental concepts to real-world applications across smart homes, agriculture, healthcare, industry, and smart cities. With easy-to-understand explanations, detailed diagrams, hands-on examples, and domain-specific case studies, it equips students, educators, and beginners with the knowledge needed to design, build, and understand modern IoT systems. Whether you're exploring embedded hardware, cloud connectivity, communication protocols, or emerging trends, this textbook serves as a complete and reliable companion for anyone stepping into the world of connected technologies.