UTSL = U = UUOC
UUCPNET n. obs.
The store-and-forward network consisting of all the world's connected Unix machines (and others running some clone of the UUCP (Unix-to-Unix CoPy) software). Any machine reachable only via a bang path is on UUCPNET. This term has been rendered obsolescent by the spread of cheap Internet connections in the 1990s; the few remaining UUCP links are essentially slow channels to the Internet rather than an autonomous network. See network address.
--The Jargon File version 4.3.1, ed. ESR, this entry manually entered by rootbeer277.