A fiat money is a money which is not backed by gold or some other commodity. Hence it's value can change over time (inflation). The US Dollar and EURO are current examples of fiat moneys.
Fiat means in Latin let it be done. Fiat money is usu. Printed into existence without the backing of any physical metal or a strong manufacturing base. Most currencies in the world today are "let it...
In the US all coins are produced by the US Mint, part of the Treasury Department. There are 4 minting facilities that make coins:
Philadelphia and Denver (mint marks P and D) make coins for general...