Nesting Lists:
Nesting lists 
  is putting a list inside a list.
  to do this you simply place an additional set of list opening and 
  closing tags and list elements inbetween the list elements of another list.
   
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html>
  <head>
  <title>fruit</title>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
  </head>
  <body>
  <ol>
  <li>do the dishes
  <li>housework 
    <ol type="A">
    <li>rearrange the furniture 
    <li>paint the walls 
    <li>throw out the pictures 
    <li>juggle the monitors 
    </ol>
  <li>check the soup
  <li>set the table
  </ol>
  </body>
  </html>