**3. Interaction design**

Some of the interactions between humans and computers (or machines or technology) focus on understanding, which means that the attention is paid to the way how people interact with technology. However, a great deal of interaction between man and computer refers to how things work and how they are created. The credits for these features go to **design** [4].

In this part, attention will be paid to the **interaction design** or **design interactivity**. It should be borne in mind that it is not only thought about the design of interactive systems but about interaction design itself. Thus, interaction design is not just an artifact1 that is produced, regardless of whether it is a physical device or a computer program. Apart from that fact, the artifacts do not give people only these devices and programs but also guides, tutorials, and online help systems. In some cases, it may be understood that no additional system is necessary for all elements, but it is probably easier to propose a different way of using existing tools [3, 5, 7].
