The U.S. Dollar (USD) is the official currency of the United States and is widely used as a global reserve currency. It is represented by the symbol "$" and is subdivided into 100 smaller units called cents. The dollar is issued by the U.S. Department of the Treasury and is used in everyday transactions, both domestically and internationally. The U.S. Dollar is recognized for its stability and is often used in international trade. Many countries hold USD as part of their foreign exchange reserves, making it a key player in the global economy. The dollar's value can fluctuate based on various economic factors, including inflation and interest rates.