Almost everyone misuses the term “font” when referring to type. We tend to use it to mean “typeface”. So to be precise, “Helvetica” and “Times Roman” are different type families, not different fonts.
Font actually refers to the difference in size and weight of type within the same type family. Helvetica Bold 12 pt. is a different font from Helvetica Light 8 pt.
The logo design shown above uses only one typeface, but three different fonts.
File this under obscure trivia you may never be able to work into a normal conversation.