The Internet of Things (IoT) is a continuously evolving ecosystem that integrates software, hardware, physical objects, and computational devices for communication, control, data collection, and exchange. It provides a framework to facilitate seamless interaction between humans and a variety of physical and virtual “things.” Moreover, the term refers to the vast network of “smart” objects that have emerged as a result of adding connectivity to devices beyond traditional computing devices.

In recent years, IoT has become one of the most significant technologies of the 21st century, encompassing billions of devices and internet-connected sensors. Examples of such devices include biometric-medical devices, wearables, weather stations, city or home lighting systems, traffic lights, cameras, sensors, and automation in industrial or agricultural production lines, among others. These devices are expected to surpass 55 billion and generate more than half of the globally produced data by the year 2025, according to IDC research [1]. Combined with the ever-increasing computing power, this data will fuel artificial intelligence systems, providing foresight and new coordination capabilities among machines that will improve our daily lives, optimize production lines, and accelerate economic development.

Modern IoT applications include smart cities, smart grid energy distribution networks, smart homes, smart healthcare, and many more, as shown in Figure 1.

Categories of IoT Applications
Figure 1: Modern Applications of IoT [2]

Sometimes, descriptions are abstract and refer to a set of IoT implementations that impact a unified space without necessarily interacting with each other. An indicative example is the one of smart cities, which includes smart networks, smart roads, smart lighting, smart public transportation and safety, smart environmental monitoring, smart parking, smart waste management, and more. Transforming a sector of human activity into a “smart” one is usually an effective strategy for addressing problems, mitigating issues, and promoting innovative solutions.

An exciting new wave of IoT applications will emerge in the immediate future, bringing to life a more intuitive interface between humans and machines. Augmented reality applications, which have already begun to appear in the IoT realm, utilizing three-dimensional imagery, multi-channel sound, and touch, will become our primary interface with the real world. The Internet of Things will forever change the way we interact with machines and with each other, removing barriers of the past such as time and distance, revolutionizing human activity in areas such as housing, nutrition and health, industry and commerce, governance, and many more. The future is here.

1. IDC Press release 27/06/2020 (Πρόσβαση 01/09/2021) – IoT Growth Demands Rethink of Long-Term Storage Strategies – https://www.idc.com/getdoc.jsp?containerId=prAP46737220

2. Janani R.P., Renuka K., Aruna A., Lakshmi Narayanan K., 2021, IoT in Smart Cities: A Contemporary Survey, Global Transitions Proceedings, vol. 2, nr. 1, August 2021, KeAi,
https://doi.org/10.1016/j.gltp.2021.08.069