People around the world rely on almost 300 different currencies to do business with each other, which is why it pays to use ISO 4217. This standard establishes internationally recognized codes for the representation of currencies that enable clarity and reduce errors ISO 639-1:2002 provides a 2-letter code that has been designed to represent most of the major languages of the world. Part 2: ISO 639-2:1998 provides a 3-letter code, which gives more possible combinations, so ISO 639-2:1998 can cover more languages. You use the Currency Codes application to define and manage currencies. A currency code is a user-defined value that represents a currency. For example, CND represents the Canadian dollar. The Currency Codes application stores currency codes at the system level.