I don't know if this is interesting to anyone else, but I knew that gage was a measurement for wire, but I didn't know if it was "official" like SI or metric. I looked it up on wikipedia (I know its not known for its accuracy, but I'm being lazy with this one.) and it appears that the system is over 150 years old. It's called "American Wire Gauge" (yes, I spelled it wrong in the title). Here's what wikipedia said about it.
American wire gauge (AWG), also known as the Brown & Sharpe wire gauge, is a standardized wire gauge system used since 1857 predominantly in the United States for the diameters of round, solid, nonferrous, electrically conducting wire. The cross-sectional area of each gauge is an important factor for determining its current-carrying capacity.
I'm riveted...how about you?