From: utzoo!decvax!wivax!linus!genradbo!mitccc!dws
Newsgroups: net.misc
Title: Re: mailing labels
Article-I.D.: mitccc.353
Posted: Fri Feb 18 15:18:07 1983
Received: Sun Feb 20 11:52:52 1983
References: 5941ux.193

Carrier presort is represented by the mnemonic device "car rt" on labels.
The postal system has some interesting systems including ECom.