RSS feeds are used for syndicating regularly changing content on a web site, including this one. You can open an RSS feed using an RSS reader and use it to see if there is any new content on this site or you can set up a server-side script to parse the feed and display it on your web site.
The articles RSS feed contains the latest 10 articles published on this entire site, the most recent of these are also displayed on the home page in both "Recent Articles" and "Featured Articles".
The individual category RSS feeds contain the latest 10 articles published in the specific category.
The blogs RSS feed contains the latest 10 blog entries published on this site, the most recent of these are also displayed on the home page.