Helvetica, it's a font that is so commonplace in our landscape, we don't even notice it. From the MTA subway signs to that American Apparel store on 23rd between Park and Lexington (you've probably passed it at some point) Helvetica is the quitessential sans-serif typeface seen all over New York. In fact, it's so common, an entire documentary on the typeface was made, which I've seen, and taught me how universal this typeface is.