An S with two vertical bars is the symbol of the United States.
Currency abbreviations: USD;
Currency code: USD;
Symbol: USA$) is legal tender of the United States of America.
The dollar bills currently in circulation are all bills issued since 1929.
The origin of the “$” goes back to the early 16th century, when Spain minted a silver dollar called the PESO.
The silver dollar has a crown and royal emblem (lion and castle) on one side and two columns on the other.
According to Western mythology, they were the pillars of Hercules, representing the peaks on either side of the Strait of Gibraltar.
According to legend, long ago, Europe and Africa were connected to each other, and were later pulled apart by Hercules.
In 1732 Mexico City was machine-minted a “two-pillar silver dollar” with a pattern similar to the PESO.
Only between the two columns added the pattern of the east and west hemispheres, two columns on each of the curled into a “$$” -shaped graph.
Over time, people will see “$” as the sign of silver dollars.