As an old letter-press guy, you people are just too modern for me -- Helvetica is relatively new (if we count Gutenburg).
O.k. font junkies: Here's one you might not know...
(I like just about anything to do with words, sayings, etymology, etc)...
The saying "Mind your P's and Q's"
This comes from the old letter-press typesetting days. A typesetter had to set the individual letters into a composing stick and the faces of the type were cast and set backwards (right to left) --- lower case "P" and lower case "Q" were often confused, (p and q), thus the saying.
If you enjoyed that one, maybe you'll like: "Lock, Stock and Barrel" --- not a printing term... it comes from the old gun dealers trade, when the price of a rifle was said to include the "(flint)lock, the stock, and the barrel".
And now back to our feature presentation: HELVETICA - THE MOVIE, (personally, I liked "SWISS")