 The file you are editing is written in HTML, the Hypertext Markup  Language.  We are not going to go into detail about HTML here, but there is a reasonably complete description in <A HREF="http://www.cs.wisc.edu/docs/htmltutorial.html">another  document</A>.  Here is an  over-simplified summary of HTML markup.  As you read it, look for examples  in the file:  <P>
