American coinage refers to the system of currency used in the United States, primarily consisting of coins made from various metals. The U.S. Mint, established in 1792, is responsible for producing coins, which include denominations like the penny, nickel, dime, quarter, half dollar, and dollar. Each coin features distinct designs that often honor important figures, events, or symbols in American history. The design and composition of American coins have changed over time, reflecting economic needs and cultural shifts. For example, the Lincoln penny was introduced in 1909 to commemorate Abraham Lincoln, while the State Quarters program, launched in 1999, celebrated each of the 50 states.