Introduction

Here comes the Internet of Things. The name that recently makes red-hot people in business, researchers, developers, geeks and … students. The name that non-technology related people consider a kind of magic and even a danger to their privacy. The EU set the name as one of the emerging technologies and estimated the worldwide market will hit well over 500 billion US dollars in 2022, while the number of IoT devices in 2030 is expected to be around 3.2 billion.

What is IoT (Internet of Things), then? Surprisingly, the answer is not straightforward.

The book composes a comprehensive guide for a variety of education levels. A brief classification of the contents regarding target groups may help in a selective reading of the book and ease in finding the correct chapters for the desired education level. To inform a reader about the proposed target group, icons are assigned to the chapters level 1 (top) and 2nd level chapters. The list of icons and their reflection on the target groups is presented in the table 1.

Table 1: List of icons presenting content classification and corresponding target groups

Icon	Target group
	General Public audience: all those who want to get familiar with basic concepts but do not necessarily step into technical details.
	Bachelor and Engineering level students
	Masters students
	Enterprise, VETS and technical