When abbreviating ''United States'', “U.S.” is the more common style in that country. When referring to the United States in a long abbreviation (USA, USN, USAF), periods should not be used. When including the United States in a list of countries, do not abbreviate the “United States” (for example, “France and the United States”, not “France and the U.S.”). | When abbreviating ''United States'', “U.S.” is the more common style in that country. When referring to the United States in a long abbreviation (USA, USN, USAF), periods should not be used. When including the United States in a list of countries, do not abbreviate the “United States” (for example, “France and the United States”, not “France and the U.S.”). |