Libraries act like virtual folders[Click image to see full-size]
The most important function of a library is to aggregate content from multiple locations into a single virtual folder. This Music library, for instance, gathers music files from two local folders and one shared folder on a Windows Home Server. Using the drop-down menu at the top right, I can then change the view to organize the files (using metadata such as album and artist, here, or authors and file types in a documents library). Using this view, I can search for files, and the buttons on the Command Bar allow me to play my selection or burn it to a CD.
This gallery is a companion piece for my in-depth review of Windows 7 based on the final release candidate. Be sure to read "What to expect from Windows 7" to get the full story.