Character Formatting

Here is a good page on character formatting that I found when I was looking for some HTML/CSS tips on doing Subscript ¹ and Superscript ².

¹ The small characters set below the normal letters or figures.
² A character slightly smaller than the rest of the font, set above the baseline, used for footnote markers and sometimes as the numerator of fractions.

Here is a page on the HTML Document Character Set.