Human-centered design is a disciple under development, where everybody should participate. Human–Systems Integration can be seen as an intersection of human factors and ergonomics (HFE), systems engineering (SE), and computer science (CS). Engineers and top managers should be able to understand the role of humans and organizations in the design of complex systems. Therefore, HSI should be taught in engineering curricula. It is also clear that engineering design is a matter of collaborative work between specialists in HFE, SE, and CS, as well as domain experts. Many situations require human presence to articulate operations in terms of trust, cognitive, and emotional comfort of end users. In the technology, organization, and people model, the term “people” denotes anybody involved in using developed technology within an organization. It could be replaced by the term “users” and include what is commonly called “end users” but also engineering designers, manufacturers, maintainers, trainers, legislators, and dismantlers.