Hackish way of referring to the postal
service, analogizing it to a very slow, low-reliability network.
Usenet sig blocks sometimes include a "Paper-Net:" header
just before the sender's postal address; common variants of this
are "Papernet" and "P-Net". Note that the standard
netiquette guidelines discourage this practice as a waste of
bandwidth, since netters are quite unlikely to casually use postal
addresses. Compare voice-net, snail-mail,
ig block: /sig blok/ [UNIX; often written `.sig' there] n.
Short for `signature', used specifically to refer to the
electronic signature block that most UNIX mail- and news-posting
software will {automagically} append to outgoing mail and news....