HTML 4.01 and CSS Level 2 define several methods to assign external CSS to HTML documents, some of them are device-dependent. The following is a list of links to tables with test results for several user agents.
The column headers show the 'test cases'. If you use a CSS-capable graphical browser, you should see at least some headers in a red, italic font with white background.
Thanks to Clemens Beier, Felix Neumann, Lauri Raittila and Brian ??? for their support.