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.
Spanish silver eight-real or peso of 1768
Alexander Hamilton finalized the details of the 1792 Coinage Act and the establishment of the U.S. Mint.
Continental one third dollar bill (obverse)
Series of 1917 $1 United States Note
ISO 4217 is a standard published by the International Organization for Standardization (ISO) that defines alpha codes and numeric codes for the representation of currencies and provides information about the relationships between individual currencies and their minor units. This data is published in three tables:Table A.1 – Current currency & funds code list
Table A.2 – Current funds codes
Table A.3 – List of codes for historic denominations of currencies & funds
An airline ticket showing the price with ISO 4217 code "EUR" (bottom left) and not with euro currency sign "€"
A list of exchange rates for various base currencies given by a money changer in Thailand, with the Thailand Baht as the counter (or quote) currency. Note the Korean currency code should be KRW.