
Unlike Windows, there is no "folder" that manages all the icons of the Dock. That's managed through the System Preferences. Mission control allows you to hold spaces that hold applications in their own space. When the Dock is along the bottom of the screen, the right side is used for the same as the bottom on the sidescreen, and the left side is used for the same the top on the side of the screen.

The bottom includes folders, minimized windows, the trash can (similar to the Windows recycle bin), hard drive and SD and network volumes, and documents all in shortcut format. When on the side, the top includes both shortcuts to applications and open applications.
