In This Chapter
Imagine a world of black screens with white text, or, for those of you who remember, dark green screens with light green text. That used to be the primary interface for users to access computers. Computing has moved on significantly and has adopted the graphical user interface (GUI) as standard on most desktop and workstation platforms. Not only that, but GUIs have gradually changed and evolved over time. This chapter starts with low-level information about what lies underneath the GUI and builds up to a description of the Unity desktop and how to use it.