Mystery of the Currency?

Question

Why is it that the symbol for the dollar is a letter "S" (e.g. one dollar = $1.00)?

Answer 1

Fascinating i found a fairly comprehensive entry in  

           wikipedia, there are other theory's there to

          

           Spanish Coat .

           From a symbol used on the Roman sestertius.

           The two pillars in the temple of Solomon.

           From a sign used on the German Thaler.

           Unit of Silver.

            

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

Answer 2

I don't know.  Thanks!  I got 2 points.