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ABŞ Dolları haqqında
The United States dollar is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents. U.S. banknotes are issued in the form of Federal Reserve Notes, popularly called greenbacks due to their predominantly green color.
The monetary policy of the United States is conducted by the Federal Reserve System, which acts as the nation's central bank.
The U.S. dollar was originally defined under a bimetallic standard of 371.25 grains fine silver or, from 1837, 23.22 grains fine gold, or $20.67 per troy ounce. The Gold Standard Act of 1900 linked the dollar solely to gold. From 1934, its equivalence to gold was revised to $35 per troy ounce. In 1971 all links to gold were repealed.
The U.S. dollar became an important international reserve currency after the First World War, and displaced the pound sterling as the world's primary reserve currency by the Bretton Woods Agreement towards the end of the Second World War. WikipediaKamboca Rieli haqqında
The riel is the currency of Cambodia. There have been two distinct riel, the first issued between 1953 and May 1975. Between 1975 and 1980, the country had no monetary system. A second currency, also named "riel", has been issued since 20 March 1980. Since the late 1990s, the riel has had an unofficial fixed exchange rate of 4,100:1 with United States dollar, Cambodia's second de facto currency for commercial transactions.
Popular belief suggests that the name of the currency comes from the Mekong river fish riĕl. It is more likely that it derives from the high-silver content Spanish-American dollar, whose value is eight reales, a coin widely used for international trade in Asia and the Americas from the 16th to 19th centuries. Wikipedia