HTML Coding Rules : Rule 6
Map tag
< img src="hotdog.gif" alt="hotdog" usemap="#planetmap" />
< map name="planetmap">
< area shape="rect" coords="0,0,118,28"
href="a.html" alt="A" />
< /map>
If you never used map tags, then consider yourself lucky. Newer technique such as image slicing or Macromedia Flash has allowed us the flexibility of performing everything this tag has to offer. It was useful in the primitive years, but I believe it should be in the deprecated list.
via [HTMLTree]