The currency symbol of the US dollar is "US$", two vertical $ refers to the US dollar, and one vertical $ refers to the currency in US dollars. For example, HK$ is Hong Kong dollars, US$ is US dollars, Can$ is Canadian dollars, and A$ is Australian dollars.

At present, the US dollar banknotes in circulation are all the banknotes issued since 1929. 1792 appeared after the passage of the American mint act. At present, the issuance of US dollars is controlled by the Federal Reserve system.

Starting from 19 13, the United States established a federal reserve system and issued federal reserve bonds. More than 99% of the banknotes in circulation are federal reserve notes. The competent department for issuing US dollars is Congress, and the Federal Reserve Bank is responsible for the specific issuance business.

Extended data:

Dollar banknotes in circulation are various versions of banknotes issued since 1929, mainly Federal Reserve banknotes. The denomination of its paper money is 1, 5 10, 20, 100 yuan, and the denomination of its coins is 1, 5 10, 25 cents.

The monetary units in the United States are: US dollar ($), US cent () decimal: 1 =100 ~ paper money1US dollar, US$ 5,1US dollar, US$ 20 and US$ 6,504. .

Coin 1%, 5%, 10%, 25%

The competent department for issuing US dollars is Congress, and the Federal Reserve Bank is responsible for the specific issuance business. The dollar is the basic currency in foreign exchange, the main currency in international payment and foreign exchange transactions, and occupies a very important position in the international foreign exchange market.

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