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.