This specialized scientific book in computer engineering presents an integrated engineering treatment of the Internet of Things (IoT) and smart cities, beginning with Internet architecture, embedded devices, sensing, communication technologies, and IoT application protocols and extending through cloud, fog, and edge computing; data management; artificial intelligence; and intelligent distributed systems. The book further addresses smart-city architectures and applications, cyber-physical systems, cybersecurity, responsible AI, and emerging future technologies. It combines theoretical foundations, engineering analysis, international standards, practical case studies, and applied design considerations to provide a comprehensive academic reference for researchers, postgraduate students, engineers, and specialists in IoT, Internet architecture, smart cities, and cyber-physical systems.