RSS is an acronym that stands for Really Simple Syndication. Is is based on XML and must follow global standards of use. You will generally know its available on a website when you see the orange XML tag.
allCUnews.com is a fully syndicated portal where you can choose to have individual sections or the entire site delivered to your desktop. You will find a very useful and easy to use tool with Pluck. You can click the link to download and begin using Pluck for free.
[1]
If you still want to know more about RSS, a few additional resources include:
OreillyXML.com [3]
Links:
[1] http://www.pluck.com/display.aspx?download&GCID=C12286x063
[2] http://blogs.law.harvard.edu/tech/rss
[3] http://www.xml.com/pub/a/2002/12/18/dive-into-xml.html