soap operayoudaoicibaDictYouDict
soap opera: [20] The original soap operas were a radio phenomenon, in 1930s America. Serial dramas dealing with humdrum-butoccasionally- melodramatic domestic life were as common then as they are on television now, and several of those on the commercial US networks were sponsored by soap manufacturers. A writer on the Christian Century in 1938 said ‘These fifteen-minute tragedies…I call the “soap tragedies”…because it is by the grace of soap I am allowed to shed tears for these characters who suffer so much from life’.

The soap connection soon linked up with horse opera, a mildly derisive term for a Western movie that had been around since the 1920s, to produce soap opera (a later coinage on the same model was space opera). The abbreviated version soap is recorded as early as 1943.
Internet (n.)youdaoicibaDictYouDict
1985, "the linked computer networks of the U.S. Defense Department," shortened from internetwork, from inter- + network (n.).
Underground Railroad (n.)youdaoicibaDictYouDict
"network of U.S. anti-slavery activists helping runaways elude capture," attested from 1847, but said to date from 1831 and to have been coined in jest by bewildered trackers after their slaves vanished without a trace. Originally mostly the term for escape networks in the (then) western states of the U.S.
limbic systemyoudaoicibaDictYouDict
"A complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood. It controls the basic emotions (fear, pleasure, anger) and drives (hunger, sex, dominance, care of offspring)", Late 19th century: limbic from French limbique, from Latin limbus 'edge'.
cyber-youdaoicibaDictYouDict
"Relating to electronic communication networks and virtual reality", Back-formation from cybernetics.