ISO 4217 is an international standard that defines three-letter codes for currencies around the world. Established by the International Organization for Standardization, it helps facilitate clear communication in financial transactions and international trade by providing a consistent way to identify currencies. Each currency code consists of three letters, where the first two letters typically represent the country, and the third letter represents the currency itself. For example, the code for the United States Dollar is USD, while the Euro is represented as EUR. This standardization aids in reducing confusion and errors in currency exchange and financial reporting.