Link (or hyperlink)- a reference or navigation element in a document to another section of the same document, another document, or a specified section of another document, that automatically brings the referred information to the user when the navigation element is selected by the user
RSS - Real Simple Syndication; family of Web feed formats used to publish frequently updated content such as blog entries, news headlines, or podcasts; . makes it possible for people to keep up with their favorite web sites in an automated manner that's easier than checking them manually.
RSS document - called a "feed", "web feed", or "channel", contains either a summary of content from an associated web site or the full text; read by an RSS aggregator/reader; shows at once when a blog has been updated; may contain only the title of the post, the title plus the first few lines of a post, or the entire post
Wikipedia : RSS Wikipedia : List of Blogging Terms
Trackback - system that allows a blogger to see who has seen the original post and has written another entry concerning it; system works by sending a ' ping ' between the blogs, and therefore providing the alert