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  1. The United States is a leader in the development of artificial intelligence technology and has maintained a space program since the late 1950s, with plans for long-term habitation of the Moon. [303] [304] In 2022, the United States was the country with the second-highest number of published scientific papers. [305]

  2. A map of the United States showing its 50 states, federal district and five inhabited territories. Alaska, Hawaii, and the territories are shown at different scales, and the Aleutian Islands and the uninhabited northwestern Hawaiian Islands are omitted from this map. The United States of America is a federal republic [1] consisting of 50 states ...

  3. The United States of America ( U.S.A. or USA ), commonly known as the United States ( U.S., US or the States ), or simply America, is a sovereign country mostly in North America. It is divided into 50 states. Forty-eight of these states and the District of Columbia border each other between the Pacific and Atlantic Oceans.

  4. The pages below contain lists of television stations in the U.S. by call sign . Historically, stations to the east of the Mississippi River were given call signs beginning with the letter W, stations to the west K. However, there are exceptions. See the article on North American call signs for more information.

  5. The United States of America, commonly known as the United States or America, is a country primarily located in North America. It is a federation of 50 states, a federal capital district, and 326 Indian reservations. Outside the union of states, it asserts sovereignty over five major unincorporated island territories and various uninhabited islands. The country has the world's third-largest ...

  6. Today, more than fifty national free-to-air networks exist. Other than the non-commercial educational (NCE) PBS, which is composed of member stations, the largest terrestrial television networks are the traditional Big Three television networks (ABC, CBS and NBC).

  7. The United States is the third most populous country in the world, and the most populous in the Americas and the Western Hemisphere. [13] The Census Bureau showed a population increase of 0.4% for the twelve-month period ending in July 2022, [12] below the world average annual rate of 0.9%. [14]

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