The most commonly used symbol for the dollar is "$", while the symbol for the cent is ";" . However, the ISO42 17 standard adopted by the International Organization for Standardization is the US dollar.

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.