The document outlines the definitions and explanations of key terms related to User-Centered Design (UCD), including human-computer interaction, user interface, and usability. It emphasizes the significance of each term in the context of UCD and suggests the use of examples and diagrams for clarity. The overall goal is to enhance understanding of these concepts and their application in design processes.

1. Define the following terms, and explain it in your own words with examples and diagrams .
Write the importance of each term in UCD.
a. Human-Computer Interaction (HCI)
b. User Interface
c. Interactive System
d. User Experience
e. User Interface Design
f. User Interaction Design
g. User Experience Design
h. Usability
i. Utility
j. Human-Centered Design
k. Affordance