Definition
A User Interface (UI) is the point of interaction between a human user and a computer system, application, or device. It encompasses all the visual elements, controls, and pathways through which a user can input commands and receive feedback. In practice, the UI translates user actions into system commands and presents system outputs in an understandable format. Understanding UI design is crucial for creating efficient, intuitive, and user-friendly systems that enhance productivity and satisfaction. For instance, the graphical layout and interactive buttons of a mobile banking app represent its user interface. This differs from the User Experience (UX), which focuses on the overall feeling and usability of the interaction, not just the visual elements. Concepts related to user interface design and implementation appear in domains like software development and IT project management.