A Dollar is a unit of currency that is used by many countries worldwide. It’s often referred to as the US dollar. It is divided into 100 cents. The U.S. dollar has been the official currency of the United States since 1792.The dollar (symbol: $; code: USD; also abbreviated US$ and referred to as the dollar, U.S. dollar, or American dollar) is the official currency of the United States of America. It is divided into 100 smaller units called cents. The dollar is the world's primary reserve currency.Several countries use it as their official currency, and in many others it is the de facto currency. Besides the United States, it is also used as the sole currency in two British Overseas Territories in the Caribbean: the British Virgin Islands and Turks and Caicos.The United States dollar is the currency most used in international transactions, and is the world's primary reserve currency. Several countries use it as their official currency, and many others allow it to be used in a de facto capacity.Besides the United States, it is also used as the sole currency in two British Overseas Territories in the Caribbean: the British Virgin Islands and Turks and Caicos. A few countries use the Federal Reserve Notes for paper money, while still minting their own coins, or also accept U.S. dollar coins (such as the Sacagawea or Presidential Dollar). As of June 27, 2011, there are $1.62 trillion in circulation, of which $1.583 trillion is in Federal Reserve notes (the remaining $49 billion is in the form of coins).The word dollar is believed to have come from Spanish peso (weight), which itself was derived from the Mozarabic dinar and the Arabic dirham. The Spanish peso was widely used by many countries as the first international currency because of its uniformity in standard and milling characteristics.
