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The United States dollar (sign: $; code: USD; also abbreviated US$), also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents.
The U.S. dollar is the currency most used in international transactions and is one of the world's reserve currencies. Several countries use it as their official currency, in many others it is the de facto currency, and it is also used as the sole currency in some British Overseas Territories (Bermuda, British Virgin Islands and Turks and Caicos).