This chapter describes some important highlights in the world of the IoT (Internet of things). As it was reported in [1], the Internet of Things (IoT) is the network of physical objects, devices, vehicles, buildings and other items, which are embedded with electronics, software, sensors, and network connectivity, which enables these objects to collect and exchange data.

The (IoT) has been the focus of attention recently. It is the foundation for delivering previously unimagined services by connecting “things”, such as sensors, actuators, consumer electronic devices, automobiles and home electrical devices, to the Internet. The communication between IoT devices and systems is via the Internet. Therefore, the IoT allows objects or things to be monitored by sensors or actuated and controlled remotely across existing networks infrastructure, creating opportunities for more-direct integration between the physical world and computer-based systems. The use of IoT results in improving on efficiency, accuracy and it also implies an economic benefit.

The field of applications for IoT is very wide. IoT technology allows expanding vehicles interaction with people or surrounding environments: Smart driver, connected ships or vehicle tracking. Moreover, IoT also leverages to improve the use of physical spaces as smart buildings or connected homes and commerce. There is also a wide range of applications in health, as smart hospitals check-in, remote health monitoring or diagnostic. More applications of IoT can be found in smart cities as automatic control of public lighting, parking, garbage, traffic or environmental conditions [2]. Smart City initiatives carry with them many goals. Main focus is centered on improving the life of its citizens. The IoT technologies are the key to solve urban problems, by monitoring and interpreting the state and usage of city assets.

Nowadays, wearables or these smart devices like smart watches or smart glasses are very popular in the IoT ecosystem. Moreover, there are many applications in security and access control.

On the other hand, IoT technology is also used to optimize and enhance the operational work processes and assets performance to enable productivity enhancements in a wide variety of industrial applications.