I'm hoping that you are walking away from this chapter with an appreciation for the power and flexibility of the tools you have at your disposal. Nautilus may well become your most important application by the time you are finished reading this book. I've barely touched on some of its capabilities. Never fear; you'll see more of Nautilus as we progress through the book. From the file browser, you can play music, launch video clips, read PDF files, burn a CD, and more.