Free HTML Code Reference

     The HTML special characters include letters from foreign alphabets. These are characters that are different in the standard character set (ISO Latin-1) than what you are most likely typing in.

     The symbols are generally used for mathematics or currency. You will also find some legal symbols like ™ and ©.

This Color

indicates the characters listed in are only good if you are quite sure your audience is DOS/Windows only people. The Mac and others won't see what you want them to.
     Other ways exist to make these characters. The fractions can be made using the superscript  and subscript  tags for the numbers with a slash (/) in between. In fact you could make any fraction this way.
     Other characters can be made using graphics if nothing else works.
     Unwritten spaces simply means a name code does not exist for this character.