A currency is a kind of money and medium of exchange.
Currency includes paper, cotton, or polymer banknotes and metal coins.
For the purposes of this list, only currencies that are legal tender, including those used in actual commerce or issued for commemorative purposes, are considered "circulating currencies".
This includes fractional units that have no physical form but are recognized by the issuing state, such as the United States mill,[A] the Egyptian millieme,[B] and the Japanese rin.
[C] Currencies used by non-state entities, like the Sovereign Military Order of Malta, scrips used by private entities, and other private, virtual, and alternative currencies are not included on this list.