From PoducateMe: Practical Solutions for Podcasting in Education, by Micah Ovadia
"A podcast is simply a collection of individual audio or video (also known as "vodcast") episodes typically recorded and edited on a computer, encoded in the MP3 file format, then uploaded to a web server. Users...are then able to download episodes from the server to their computers and listen to the recordings on their systems or transfer them to a media player such as an iPod. ...[W]hat makes podcast episode files unique lies in how they are disseminated. Podcast files are referenced in XML-based RSS (Really Simple Syndication) "feeds" (files containing lines of code), which make it possible for listeners to easily subscribe to and automatically download new episodes as they are uploaded to the internet."
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