Operating System: The operating system is the software that manages computer hardware and software resources and provides common services for computer programs. It acts as the foundation on which applications run.
User Interface (UI): The user interface refers to the visual elements and controls through which users interact with an application. It includes buttons, menus, icons, and other graphical components.
Mobile Apps: Mobile apps are applications specifically designed to run on mobile devices such as smartphones and tablets. They often offer features tailored to the capabilities of these devices.