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| | sociology - United States |
 | | The United States of America — also referred to as the United States, the U.S.A., the U.S., America¹, the States, or (archaically) Columbia — is a federal republic of 50 states located primarily in central North America (with the exception of two states: Alaska and Hawaii). |
 | | The United States does not have an official language at federal level; nevertheless, English is spoken by the vast majority of the population and serves as the de facto language: English is the language used for legislation, regulations, executive orders, treaties, federal court rulings, and all other official pronouncements. |
 | | The United States is also a great center of higher education, boasting more than 4,000 universities, colleges and other institutions of higher learning, the top tier of which may be considered to be among the most prestigious and advanced in the world. |
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