The acronym GUI stands for Graphical User Interface. A GUI is a user-friendly visual representation of software applications, allowing users to interact with a computer or program through graphical elements such as windows, icons, buttons, and menus instead of text-based commands. This design enhances usability, enabling users—regardless of their technical background—to navigate and control software easily. GUIs are prevalent in operating systems, business applications, and web services, significantly improving user experience compared to command-line interfaces.