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A podcast is a media object consisting of audio and/or video files shared over the internet. The podcast can be downloaded and consumed on a variety of audio/visual devices, including computers and portable devices such as ipods. The most distinguishing feature of a podcast is that consumers can subscribe to a podcast "feed" by entering the web address into an "aggregator," such as itunes. The aggregator automatically downloads new podcasts when they become available.

Unlike conventional radio shows, there is no "live" feed or broadcast involved in podcasting. Because podcasts are prerecorded, producers and consumers both create and consume at their convenience.

"A podcast is distinguished from other digital media formats by its ability to be syndicated, subscribed to, and downloaded automatically, using an aggregator or feed reader capable of reading feed formats such as RSS or Atom." [1]



  1. http://en.wikipedia.org/wiki/Podcasts