A podcast (or non-streamed webcast) is a series of digital media files (either audio or video) that are released episodically and often downloaded through web syndication. The word replaced webcast in common use with the success of the iPod and its role in the rising popularity and innovation of web feeds. - Wikipedia
Mac Computer users:
Some earlier podcasts are in wma format, a file format not supported on Mac without the correct player. If you are having difficulty playing the podcasts, please follow the link below to download and activate the Mac Media Player.