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A user interface (UI) is the part of a computer system, website, or device that a person uses to interact with the system, website, or device. It is the interface through which a user communicates with the system, providing input and receiving output. A good user interface is one that is easy to use, intuitive, and efficient, allowing the user to quickly and easily accomplish their goals. The design of a user interface is a crucial aspect of user experience (UX) design, and involves considering the needs and goals of the user, as well as the capabilities and limitations of the system, website, or device.

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