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Arches National Park

(Encyclopedia)Arches National Park, 76,519 acres (30,979 hectares), E Utah; est. as a national monument 1929, designated a national park 1971. Located in red-rock country and overlooking the gorge of the Colorado R...

National Recovery Administration

(Encyclopedia)National Recovery Administration (NRA), in U.S. history, administrative bureau established under the National Industrial Recovery Act of 1933. In response to President Franklin Delano Roosevelt's cong...

National Republican party

(Encyclopedia)National Republican party, in U.S. history, a short-lived political party opposed to Andrew Jackson. In the election of 1828, which Jackson won overwhelmingly, some of the supporters of his opponent, ...

National Security Agency

(Encyclopedia)National Security Agency (NSA), an independent agency within the U.S. Dept. of Defense. Founded by presidential order in 1952, its primary functions are to collect and analyze communications intellige...

National Symphony Orchestra

(Encyclopedia)National Symphony Orchestra (NSO), Washington, D.C., founded in 1931 by Hans Kindler, who conducted the orchestra until 1949. Its first home was Constitution Hall; since 1986 it has been affiliated wi...

Audubon Society, National

(Encyclopedia)Audubon Society, National, one of the oldest and best-known U.S. environmental organizations; founded 1886 by George Cird Grinnell and named for John James Audubon. The nonprofit organization, which h...

Antietam National Battlefield

(Encyclopedia)Antietam National Battlefield: see Antietam campaign. ...

Antietam National Cemetery

(Encyclopedia)Antietam National Cemetery: see National Parks and Monuments (table)national parks and monuments (table). ...

Haleakala National Park

(Encyclopedia)Haleakala National Park häˌlāäˌkäläˈ [key], 29,824 acres (12,074 hectares), on Maui island, Hawaii. Haleakala volcano, 10,023 ft (3,055 m) high, has been dormant since the mid-1700s. Its crate...

gross national product

(Encyclopedia)gross national product (GNP), in economics, a quantitative measure of a nation's total economic activity, generally assessed yearly or quarterly. In estimating the GNP, only the final value of a produ...