Columbia Encyclopedia

Search results

163 results found

calculator

(Encyclopedia)calculator or calculating machine, device for performing numerical computations; it may be mechanical, electromechanical, or electronic. The electronic computer is also a calculator but performs other...

modulation, in communications

(Encyclopedia)CE5 Modulation modulation, in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulatin...

secession, in political science

(Encyclopedia)secession, in political science, formal withdrawal from an association by a group discontented with the actions or decisions of that association. The term is generally used to refer to withdrawal from...

weaving

(Encyclopedia)weaving, the art of forming a fabric by interlacing at right angles two or more sets of yarn or other material. It is one of the most ancient fundamental arts, as indicated by archaeological evidence....

Seven Years War

(Encyclopedia)Seven Years War, 1756–63, worldwide war fought in Europe, North America, and India between France, Austria, Russia, Saxony, Sweden, and (after 1762) Spain on the one side and Prussia, Great Britain,...

navy

(Encyclopedia)navy, originally, all ships of a nation, whether for war or commerce; the term navy now designates only such vessels as are built and maintained specifically for war. There have been three major devel...

lock and key

(Encyclopedia)lock and key, fastening fitted to an entryway, such as a gate or door, or a container, such as a cabinet, drawer or safe, to keep it closed and/or prevent unauthorized access or use. Locks typically c...

Calhoun, John Caldwell

(Encyclopedia)Calhoun, John Caldwell kălˌho͞onˈ [key], 1782–1850, American statesman and political philosopher, b. near Abbeville, S.C., grad. Yale, 1804. He was an intellectual giant of political life in his...

book publishing

(Encyclopedia)book publishing. The term publishing means, in the broadest sense, making something publicly known. Historically, it came to refer to the issuing of printed materials, such as books, magazines, period...

Milky Way

(Encyclopedia)CE5 Position of the sun in the Milky Way Milky Way, the galaxy of which the sun and solar system are a part, seen as a broad band of light arching across the night sky from horizon to horizon; if ...