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ISO 3166-1 numeric (or numeric-3) codes are three-digit 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. They are similar to the three-digit country codes developed and maintained by the United Nations Statistics Division, from which they originate in its UN M.49 standard. They were first included as part of the ISO 3166 standard in its second edition in 1981, but they have been released by the United Nations Statistics Division since as early as 1970. An advantage of numeric codes over alphabetic codes is script (writing system) independence.〔(【引用サイトリンク】 title=ISO 3166 – FAQs – General questions )〕 The ISO 3166-1 alphabetic codes (alpha-2 and alpha-3) use letters from the 26-letter English alphabet and are suitable for languages based on the Latin alphabet. For people and systems using non-Latin scripts (such as Arabic, Bengali, Chinese, Cyrillic, Devanagari, Greek, Hangul, Hebrew and Japanese), the English alphabet may be unavailable or difficult to use, understand, or correctly interpret. While numeric codes overcome the problems of script dependence, this independence comes at the cost of loss of mnemonic convenience. Another advantage is that when countries merge or split, they will get a new numeric code, while the alphabetic code stays in use for (a part of) that country. A persistent number is needed in datasets with historical country information. ==Current codes== ===Officially assigned code elements=== The following is a complete list of the current officially assigned ISO 3166-1 numeric codes, using the English short country names officially used by the ISO 3166 Maintenance Agency (ISO 3166/MA):〔(【引用サイトリンク】 title=Country names and code elements )〕 ===User-assigned code elements=== User-assigned code elements are codes at the disposal of users who need to add further names of countries, territories, or other geographical entities to their in-house application of ISO 3166-1, and the ISO 3166/MA will never use these codes in the updating process of the standard. The numeric codes to can be user-assigned. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「ISO 3166-1 numeric」の詳細全文を読む スポンサード リンク
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