The Internet of Things (IoT) represents a transformative technological paradigm in which physical objects are embedded with sensors, software, and connectivity, enabling them to collect, exchange, and act upon data over the internet. IoT has rapidly emerged as a key enabler of smart systems, influencing diverse domains such as healthcare, agriculture, transportation, smart cities, industrial automation, and home automation. This book aims to provide a comprehensive introduction to the fundamental concepts, architectures, and technologies that underpin the Internet of Things. It covers essential topics including IoT components, sensors and actuators, communication protocols, cloud integration, data analytics, and security considerations. The material is organized in a logical and progressive manner to help learners build a strong conceptual and practical foundation. Emphasis is placed on real-world applications and hands-on understanding, supported by illustrative diagrams, case studies, and practical examples. Each chapter includes review questions and exercises to reinforce learning and encourage critical thinking. The content is designed to meet the academic requirements of undergraduate students in engineering, computer science, and information technology. This book is intended to serve as a valuable resource for students, educators, and practitioners seeking to understand and apply IoT technologies effectively. It is hoped that the knowledge gained through this text will enable readers to design innovative, efficient, and secure IoT solutions for real-world challenges.