RSS
Really Simple Syndication
or: RSS Feeds
Allow anyone to subscribe to updates to blogs (or wikipage), creating an interlinked 'blogosphere'.
Definition by the Webopedia:
"Short for RDF Site Summary or Rich Site Summary, an XML format for syndicating Web content. A Web site that wants to allow other sites to publish some of its content creates an RSS document and registers the document with an RSS publisher. A user that can read RSS-distributed content can use the content on a different site. Syndicated content includes such data as news feeds, events listings, news stories, headlines, project updates, excerpts from discussion forums or even corporate information." (http://www.webopedia.com/TERM/R/RSS.html0
The Washington Post explains: “RSS lets Web sites publish free "feeds" of their content, which a program called a newsreader collects on a set schedule, displaying new headlines and links for you to read within the newsreader or, with one click, in your Web browser" (http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&contentId=A55027-2004Mar13¬Found=true)
Some sites offer the same functions as an RSS reader, i.e. the possibility to combine various blogs in folders and to monitor them all from the same place, see http://www.bloglines.com/