User interface - Wikipedia
In the industrial design field of human-computer interaction, a user interface (UI) is the space where interactions between humans and machines occur.
The Difference Between UX And UI Design - A Beginner's Guide
"User Experience (UX) and User Interface (UI) are some of the most confused and misused terms in our field. A UI without UX is like a painter slapping paint onto a canvas without thought; while UX...