The ISO 3166-1 alphabetic codes (alpha-2 and alpha-3) use letters from the 26-letter English alphabet. It is published by the International Organization for Standardization (ISO), The code represents countries, territories, and special areas of geographical areas. Two letter ISO language name - ISO 639-1 code, Three letter ISO language name - ISO 639-2 code, Three letter Windows language name - code defined in Windows API, LCID - Windows Language Code Identifier, IETF language tag - RFC 4646 standard identification for language. $\begingroup$ No. There are $\binom{3}{2}$ ways to choose the positions of the two As and four ways to choose one of the other letters to go in the remaining open position, so you should have $\binom{3}{2}\binom{4}{1} = 3 \cdot 4 = 12$ possible code words for the second case. ISO 3166-1 alpha-3 codes ISO 3166-1 alpha-3 codes are three-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest. ISO3 Code Country ABW Aruba AFG Afghanistan AGO Angola ISO 4217 is the international standard describing three-letter codes known as the currency code. (Example:IDR is the currency code for the Indonesia Rupiah) This code defines the names of currencies established by the International Organization for Standardization (ISO). ISO 4217 are the accepted codes used by banking institutions, businesses List of Three-Letter Country Codes (ISO 3166) This is a list of three-letter country codes (alpha-3 codes) defined in ISO 3166. For the two-letter country code list see: List of Country Codes in ISO 3166. fasteri.com dlmVHT.

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