The humble ZIP Code shows up in all kinds of surprising places. Planet Money looks at how it was born, how it transformed the mail and talks to one researcher who argues that it's gone too far. The ...

The humble ZIP Code shows up in all kinds of surprising places. Planet Money looks at how it was born, how it transformed the mail and talks to one researcher who argues that it's gone too far. The ...

Everyone has memorized exactly two ZIP codes: 90210 and whatever their own ZIP code is. We can thank a certain TV show set in Beverly Hills for that. Aside from that, general knowledge of these ...