If you double-click the icon for your Mac OS X drive, you see a collection of permanent folders, as shown previously in Figure 2.1. These folders contain preinstalled applications, utilities, and configuration files for your system, known collectively as system folders. You should not modify these system-level directories or move them from their default locations. However, you can create folders and files within these locations.
The following list describes the folders at this level, which serve as the starting point for accessing most of your system's functions: