The United States Dollar, often abbreviated as USD, is the official currency of the United States. It is widely recognized around the world and is used in many international transactions. The dollar is divided into 100 smaller units called cents, and it comes in various denominations, including coins and paper bills. The USD is considered a global reserve currency, meaning many countries hold it as part of their foreign exchange reserves. This status makes the dollar a key player in the global economy, influencing trade, investment, and financial markets worldwide.