Podcasts

http://podcast.com/ http://technology.podcast.com/ http://science.podcast.com/

Wikipedia: A **podcast** is a series of digital computer files, usually either digital audio or video , that is released periodically and made available for download by means of web syndication. The syndication aspect of the delivery is what differentiates podcasts from other ways of accessing files, such as simple download or streaming : it means that special client software applications known as //podcatchers// (such as Apple Inc. 's iTunes or Nullsoft 's Winamp ) can automatically identify and retrieve new files in a given series when they are made available, by accessing a centrally-maintained web feed that lists all files currently associated with that particular series. New files can thus be downloaded automatically by the podcatcher and stored locally on the user's computer or other device for offline use, making it simpler for the user to download content that is released episodically.