The United States dollar (USD) is the official currency of the United States and is widely used in global trade. 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 managed by the Federal Reserve, the central bank of the United States. As one of the most recognized currencies in the world, the U.S. dollar serves as a benchmark for many other currencies and is often used as a reserve currency by other countries. Its stability and widespread acceptance make it a key player in international finance and trade.