RSS (Really Simple Syndication) is a XML-based format that lets you subscribe to
websites and blogs. Subscribing to an RSS feed lets you see updated information
quickly and easily in a single interface (even from multiple sources). RSS enables
you see what's new on your favorite sites without having to visit them all individually.
The most common tool users will need to subscribe to a RSS feed will either be a
news reader or aggregator. These tools can be web based or stand-alone programs.