I don't know any published lists for HTML, but all I know is that to get that tilted font (Italic) you do <p><em>I am Geocaching</em></p>. To get bold font, you do <p><b>I am Geocaching</b></p>. I think you always put <p> and then your tag, and to end the HTML, </p> is used?
I'm unsure too.
The K from TRKS
P.S.
Don't forget to double space after you end your HTML!