Okay, another random question. (This all relates to one fic, I promise.)

Do European cities/countries, in particular Switzerland, have zip codes?

If I had to take a guess, I believe they do, because I think I recall mailing one with an international zip code.

But then, I got to thinking that I think
zip codes were invented by the US postal system, and so I didn't know. (I hope no one sees this as typical "US aggorance/superority" because that's not what it's intended as.) And I don't want to offend anyone with that comment, either. I'm sorry, my social cues have never been very good.

But anyway, I would like to know if other countries have zip codes. If they do, are they for cities or countries? Do they use them only internationally?

Thanks,
Sara

P.S. Thanks again for the answers to the Swiss chocolate question, and to Paul for the anthrax question