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compact disc
(Encyclopedia)compact disc (CD), a small plastic disc used for the storage of digital data. As originally developed for audio systems, the sound signal is sampled at a rate of 44,100 times a second, then each sampl...Tavener, Sir John Kenneth
(Encyclopedia)Tavener, Sir John Kenneth tăvˈənər, –nə [key], 1944–2013, English composer, b. London; studied Royal Academy of Music. Tavener, whose work shows a consistent but evolving tonal or modal style...Bell, Alexander Graham
(Encyclopedia)Bell, Alexander Graham, 1847–1922, American scientist, inventor of the telephone, b. Edinburgh, Scotland, educated at the Univ. of Edinburgh and University College, London; son of Alexander Melville...pulsar
(Encyclopedia)pulsar, in astronomy, a neutron star that emits brief, sharp pulses of energy instead of the steady radiation associated with other natural sources. The study of pulsars began when Antony Hewish and h...Edison, Thomas Alva
(Encyclopedia)Edison, Thomas Alva, 1847–1931, American inventor, b. Milan, Ohio. A genius in the practical application of scientific principles, Edison was one of the greatest and most productive inventors of his...Douglass, Frederick
(Encyclopedia)Douglass, Frederick dŭgˈləs [key], c.1818–1895, American abolitionist, b. near Easton, Md. as Frederick Augustus Washington Bailey. The son of a black slave, Harriet Bailey, and a white father, m...Beckett, Samuel
(Encyclopedia)Beckett, Samuel bĕkˈĭt [key], 1906–89, Anglo-French playwright and novelist, b. Dublin. Beckett studied and taught in Paris before settling there permanently in 1937. He wrote primarily in French...computer
(Encyclopedia)CE5 Schematic diagram of a computer system: Data flow is indicated by solid lines; control signals are indicated by dashed lines. computer, device capable of performing a series of arithmetic or l...David, Jacques-Louis
(Encyclopedia)David, Jacques-Louis zhäk-lwēˈ dävēdˈ [key], 1748–1825, French painter. David was the virtual art dictator of France for a generation. Extending beyond painting, his influence determined the c...fingerprint
(Encyclopedia)fingerprint, an impression of the underside of the end of a finger or thumb, used for identification because the arrangement of ridges in any fingerprint is thought to be unique and permanent with eac...Browse by Subject
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