One dollar is a unit of currency used primarily in the United States and several other countries. It is represented by the symbol $ and is divided into 100 smaller units called cents. The U.S. dollar is issued by the $Federal Reserve and is one of the most widely used currencies in the world. The design of the one-dollar bill features a portrait of $George Washington, the first President of the United States, on the front. The back of the bill displays the $Great Seal of the United States, which includes an eagle and a shield, symbolizing the nation's strength and unity.