The Peace Sign and the Dollar Sign

Betsy had a very interesting post about the birthday of the peace sign. I knew that the peace sign just turned 50 but I did not know that the design actually started with a N (for nuclear) and a D (for disarmament) with a circle around it.

That reminded me that the symbol for the US dollar is actually a U (for United) with a S (for States) superimposed on top. The bottom of the U had been dropped years ago and recently people have started just using a single bar through the S but that's what the symbol stands for.