GUI (Graphical User Interface) 2 - "Environment Interaction"

GUI (Graphical User Interface): Abbreviated GUI (pronounced GOO-ee). A program interface that takes advantage of the computer's graphics capabilities to make the program easier to use.

In Atom Universe, Graphical User Interface (GUI) is a way to interact with your avatar. One of the GUI in Atom Universe is the "Environment Interaction" icon, which allows you to apply context-sensitive interactions: sit on a bench, lean against a wall, etc...