Q:

$ sign where did it originate?

This sign is a very interesting one. I do not know where it originated in.
And why do we use it? How does $ sign relate to dollar?
Does it mean money? Sometimes I've seen it with double lines striking through it.

A:

Per Wikipedia, the leading hypothesis is that the "U" & the "S" were written overtop of each other, and eventually the two bars of the "U" were collapsed into one.

