Final answer:
Don Norman's model of interaction includes two components: the human user and the system. This model is foundational for user experience design in human-computer interaction.
Step-by-step explanation:
Don Norman's model of interaction primarily consists of two components: the human user and the system with which the user is interacting. This model underpins many aspects of user experience design and is a fundamental concept in the field of human-computer interaction. The human side includes the user's capabilities, experiences, emotions, and goals, while the system side encompasses the technological aspects such as hardware and software that facilitate the interaction. Norman's model emphasizes the importance of designing systems in a way that acknowledges the needs and limitations of humans, thereby creating more user-friendly and accessible technologies.