Abstract
Smart cities rely on smart technologies in all their possible forms; hence, this chapter is focusing on the state of the art of smart technologies. It describes these smart devices in all their ways and forms. In addition, techniques of software applications that are embedded in these smart devices are described along with their capabilities to adapt automatically and modify behavior to fit a user's environment. A smart city paradigm is also presented that focuses on sensors, smart devices, smart service provider subsystems, and smart sector infrastructure. A broader model of smart cities is discussed, and the chapter provides concrete goals, infrastructure, domains, and constituents. The chapter concludes by examining operation features such as the industrial setting, ubiquity, throughput, channels, and interoperability.