A library is more than just a name or a convenient place to store similar files or folders. Each library is designed for specific file types and presentation. As mentioned earlier, each library has two default folders, My — which is where your personal files go by default, and Public —, where you can place items that you want to share with users on your computer or network.
The Document library is the default destination for almost every content file that isn't a picture, video, or music file. Many programs create their own folders inside the Document library for storing documents and data files. The following list is a sampling of programs that typically save files to the Documents library: