The currency unit for the issuance of the dollar is set on 1/1000 increments in spite of the lowest denomination in issuance being the penny, valued at 1/100 of a dollar. The current circulation of the USD is just over 800 billion, a number just below the circulation of the euro which is currently 816 billion. There are also 23 more countries, not yet included in either of these categories that have officially pegged their local currency to the USD, these currencies include the Belize dollar, Lebanese pound, Saudi riyal, Jordanian dinar, United Arab Emirates dirham, and the East Caribbean dollar just to name a few. In addition to these countries that use the USD as their primary currency, 14 other countries use it as their unofficial currency, these countries include Cambodia, Lebanon, Palau, East Timor, The Bahamas, and the Marshall Islands. This includes such countries as Panama, Ecuador, El Salvador, Puerto Rico, Guam, U.S. In addition to being the World's largest reserve currency the USD is officially used by 14 countries as their primary currency. It is also the currency for the Turks and Caicos Islands as well as the British Virgin Islands, both of which are overseas territories of the United Kingdom.
The USD is the the worlds largest reserve currency, the most used currency in currency pair trades, and the primary currency used in the United States of America and its territories.
USD is the currency code for the United States dollar (USD), it is synonymous with US$, both of which are represented in accounting with the $ symbol. 1 US dollar is subdivided into 10 dimes, 100 cents or 1000 mills.