• CSS 1: 17 December 1996, to separate style and content in HTML documents (revised January 1999)
• CSS 2: May 1998, much enhanced version, some parts still not implemented by browsers
• CSS 2.1: July 2007, April 2009 (CR), bug fixes, some new features, unimplemented parts of CSS 2.0 removed
• CSS 3.0: started 2004, Modularised with some modules at CR, others at WD
  • W3C regularly updates the current state
• CSS 2.1: http://www.w3.org/TR/CSS21/
• IE8, Opera 9, Firefox 3, Safari 2 and Chrome all support most of CSS 2.1 and XHTML 1.0 Strict when run in Standards Mode
• All are committed to supporting all of CSS 2.1
• We will assume all browsers are running in standards mode

Will describe styling in terms of the standard: CSS 2.1