Pingback trackback is a system used to associate posts on different blogs and, in a greater sense, it allows blogs to "share" readers.
Here's an example of how a pingback linkback works: If you have just posted an article discussing Admiral Byrd's second Antarctic expedition and then happen to run across a similar or related post on another blog, you could use the trackback mechanism to notify the other poster of the existence of your post. When your trackback notification (which is the permalink to your post and, possibly, some basic …

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