Currency exchange is the trading of one currency against another. Professionals refer to this as foreign exchange, but may also use the acronyms Forex or FX. Currency exchange is necessary in numerous circumstances. Consumers typically come into contact with currency exchange when they travel. They go to a bank or currency exchange bureau to convert their "home currency into , the currency of the country they intend to travel to. They may also purchase goods in a foreign country or via the Internet with their credit card, in which case they will find that the amount they paid in the foreign currency will have been converted to their home currency on their credit card statement.