Human-Computer Interaction (HCI) emerged in the 1980s as an area of research at the intersection of computer science, cognitive science, and human factors engineering. Over three decades, HCI has expanded rapidly, drawing in professionals from many disciplines and incorporating diverse concepts. HCI now encompasses several semi-autonomous fields related to human-centered digital technologies. The integration of different approaches from various disciplines into HCI demonstrates how disparate epistemologies and paradigms can be reconciled to form a productive intellectual project.