Today, everyone is a typographer. If you have access to a keyboard and a basic software program, you have control over typography. For instance, if you construct email, write for a blog or build presentations, you have a type of control (pun intended) over your words and letters that your great grandfathers would envy...
Great advice about using fonts in your presentation. The comments are worth a look too.
Basia typografische tips
Advice for presentation fonts.