Say What?!

These boxes are all over the city, oddly enough. I have to smile every time I see them, 'cause they remind me of something out of a weird science fiction story:
"Don't like your childhood? Have bad memories? Well, just leave your past in one of our convenient drop boxes and we'll get you a new one in no time!"

Unfortunately (or fortunately?), fiction is stranger than truth in this case. The actual truth is that the word is something like our own "post" and means something akin to "mail."

I still like my original interpretation best :).