--- title: "GUI" enableToc: false # do not show a table of contents on this page --- Authored by:: [[P- Brendan Langen]] A graphical user interface, or GUI, is a presentation layer atop an application. Most user interfaces today are GUIs, although a variety of other options exist, including Command Line Interfaces and Command Line User Interfaces. GUIs enable constructed additions, which allows affordances like [[ZUI]]s to exist atop them.