The short form "United States" is also standard. Other common forms are the "U.S.", the "USA", and "America". Colloquial names are the "U.S. of A." and, internationally, the "States". "Columbia", a name popular in American poetry and songs of the late 18th century, derives its origin from Christopher Columbus; both "Columbus" and "Columbia" appear frequently in U.S. place-names, including Columbus, Ohio, Columbia, South Carolina, and the District of Columbia. Places and institutions throughout the Western Hemisphere bear the two names, including Colón, Panama, the country of Colombia, the Columbia River, and Columbia University.