[JohnnyB]

Back in my day if you wanted to send written message or some document to someone you would put that message on real paper, stick it in some other folded paper, write a street address on it, stick on a special sticker you could buy and go drop it in a box outside. For just a few cents somebody would come pick that letter up and take it to whichever address you wrote on it, even to the other side of the country for you.