Social networking is a method to link communities of people together in some fashion, usually by software. The software, though varies from network to network usually gives users the ability to share and upload photos, videos and bookmarks, blog, message friends, link with or make new friends.
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A social networking site geared towards book lovers. Open to all, it allows members to exchange books, add something similar to margin notes, have general discussions, and create their own virtual shelve for others to peruse.