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UI, or User Interface, refers to the visual and interactive elements through which users engage with a digital device, software, or application. It includes components such as buttons, menus, icons, text fields, and layout design that enable users to input commands and receive feedback. A well-designed UI enhances usability by making navigation intuitive, efficient, and visually appealing. In mobile devices, UI encompasses both touchscreen gestures and graphical elements tailored for small screens. User interfaces can be graphical (GUI), voice-based, or gesture-driven, and they play a critical role in shaping the overall user experience (UX).
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