The user interface (UI) refers to the part of a software application or system that users interact with. It includes graphical elements, controls, and visual components that enable users to input commands, view information, and navigate the application.
For example, the UI of a web-based email service includes elements like buttons, text fields, and menus that users use to compose emails, read messages, and manage their inbox. A well-designed UI is critical for ensuring a user-friendly experience.
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