Definition
ISO 4217
The international standard published by the International Organization for Standardization (ISO) defining three-letter alpha codes and three-digit numeric codes for currencies.
Detailed Overview & Context
The first two letters represent the ISO 3166-1 alpha-2 country code (e.g. US for United States, JP for Japan), and the third letter represents the currency unit (e.g. D for Dollar, Y for Yen).