We are going to explain what is a Graphical Interface with a simple app, I'm sure that you used this app daily, in today´s digital world we usually pay from an empanada in your neighborhood store to your water bill, this is a perfect example how it works, you can charge your account, sent money to contacts, create savings for future plans, you navigate through the app with buttons that are interactives and clearly with the user A graphical user interface is an operating system interface that enables user interactions with the app functionalities through different elements as: Input Elements : Buttons, Text Fields, Dropdoown lists Navigational Elements: Search fields, Toolbars Informational Elements: Notifications, Menu Bars Container elements: Windows, Dialog Boxes