Since the introduction of the iPod, this small white device has made a large impact on education, music, and pop culture. You can carry an entire CD collection on an iPod, plus videos, still photographs, audio books, and podcasts, and still have room for more. It's not just the capacity of the iPod that makes it important, Apple has created a new way of thinking about audio and video content. With the listing of podcasts in the iTunes Store, many people realized that they could create an audio file, upload to some server somewhere, create the feed, and post that to iTunes. And anyone in the world could search iTunes, subscribe, and download it for free.