A variety of portable media devices and digital formats were developed in recent years to distribute information through the Internet, with podcast among the digital formats used to deliver various media content for these portable devices. A podcast is a collection of digital media files distributed over the Internet for playback on portable media players and personal computers. While the same con­ tent also may be available through direct download or streaming, a podcast is different from other digital audio and video delivery format due to its use of syn­ dication feeds. This allows users to subscribe to and download podcasts automati­ cally to their media playback devices when new content is added.