Description: The system user interface (UI) in computing is the graphical layer that allows users to interact with an operating system and its applications. This interface consists of visual elements such as buttons, menus, icons, and windows, which facilitate navigation and the use of device functionalities. The interface is designed to be intuitive and accessible, allowing users to perform everyday tasks such as sending messages, browsing the internet, or managing files efficiently. Additionally, modern user interfaces are often highly customizable, enabling users to modify the appearance and behavior of their devices according to their preferences. This flexibility is a distinctive feature of many operating systems, which adapt to a wide variety of devices, from computers to smartphones and IoT devices. The interface also includes design elements like Material Design or similar frameworks, which provide a coherent and attractive visual guide, enhancing the user experience. In summary, the system user interface is essential for user interaction with devices, combining functionality and aesthetics to offer a smooth and enjoyable experience.