paper-net: n. 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, P-mail.