Even though Apple tries to prevent users from transferring music from an iPod to iTunes, there are third-party program - like iPod PC Transfer - that help you do just that. They're also valuable when you're trying to move an iTunes library from an old computer to a new one.
If you've used iPod PC Transfer to transfer files from an iPod to iTunes, or from one computer to another, write a review here to let others know if this is the right software for them.
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