not to be rude but i am sorta astonished at the lack of knowledge on basic cords and what they do. i'm no expert and can sure learn more, so i started this to give people a chance add their piece.

here i'll start:

rca cable: this sends a left and right signal aka stereo sound.

Umbilical cord

In placental mammals, the umbilical cord (also called the birth cord or funiculus umbilicalis) is the tube that connects a developing embryo or fetus to the placenta.

^ well i was just trying to start a helpful thread but i think it might be that i worded it wrong. i was being a bit of a jerk cuz i had bad headache.

No way- it's a good idea. It took me forever to understand the whole balanced/unbalanced thing.

It's real hard to beat Wikipedia these days for wrapups of just about everything:

http://en.wikipedia.org/wiki/RCA_connector