In the computer world, a “balanced” signal is known as “differential”. The same technique is used – the signal is sent with the inverse signal running parallel to it. Sometimes, the two signals’ wires are twisted around each other (known as “twisted pair” wire). Differential signals are used in 10Base-T and 100Base-T Ethernet and some varieties of SCSI.
(Special thanks to inSync reader, David C. for this one.)