| Kommentar | From the Wikipedia Style Guide:
In American and Canadian English, U.S. (with periods) has long been the dominant abbreviation for United States. US (without periods) is more common in most other national forms of English. Some major American style guides, such as The Chicago Manual of Style (16th ed.), now deprecate U.S. and prefer US. Use of periods for abbreviations and acronyms should be consistent within any given article and congruent with the variety of English used by that article. In longer abbreviations (three letters or more) that incorporate the country's initials (USN, USAF), do not use periods. When the United States is mentioned with one or more other countries in the same sentence, U.S. or US may be too informal, especially at the first mention or as a noun instead of an adjective (France and the United States, not France and the U.S.). Neither use the spaced U. S. nor the archaic U.S. of A., except when quoting. Do not use U.S.A. or USA, except in a quotation or as part of a proper name (Team USA), because these abbreviations are also used for United States Army and other names. USA is correct, though, in the context of formal codes in which it appears that way, e.g. the ISO 3166-1 alpha-3 codes and FIFA country codes. |
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