The United States dollar (USD) is the official currency of the USA and its territories across the world, including Guam, Puerto Rico, and the US Virgin Islands. The American dollar is also the official medium of exchange of independent countries such as Ecuador, Palau, and Zimbabwe.
The US dollar was first printed in 1914, following the Federal Reserve Bank's creation. Today, it's held in extremely large quantities by various central banks all over the planet as a reserve currency. Hundreds of live casinos operating online accept US dollars for deposits and withdrawals, allowing players to gamble on the Internet using one of the world's most valuable currencies.