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In spite of the massive success that Apple has enjoyed with its iPod line of portable music players, the company must still be feeling the pressure from the competition. Apple has filled a patent application on how future iPods will use wireless for electronic media purchasing online.

This application filing occurs not too soon before the much-anticipated release of the Microsoft Zune. While this could be an effort to fight the software giant and its product directly, it should be noted that Zune’s built-in Wi-Fi will be limited to the file sharing between devices with no direct Internet purchases from the handheld.