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ISO standard 3166-1 gives codes for countries, dependent territories, and special areas of geographic interest.

The ISO 3166-1 alpha-2 code is a two-letter code. In most cases, this two-letter code is used as the top-level domain for that country on the internet. The only exception is that the United Kingdom uses ".uk" instead of its ISO 3166-1 alpha-2 code of GB. The ISO 3166-1 alpha-2 code is also used as the first two letters of each currency code, including GBP for UK pounds sterling.

The ISO 3166-1 alpha-3 code is a three-letter code.

The ISO 3166-1 numberic code is a number associated with each country or territory in the standard.

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12y ago

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