keystone component

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• Keystone School — Infobox Private School background = #f15f0fa border = #ccd2d9 name = Keystone School motto = Academic Excellence established = 1948 type = Private, K 12 religion = Non Sectarian head name = Head of School head = Hugh McIntosh city = San Antonio… …   Wikipedia

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• 28th Infantry Division (United States) — Infobox Military Unit unit name=28th Infantry Division caption=28th Infantry Division shoulder sleeve insignia country=USA allegiance= type=Division branch=Army National Guard dates= 1879 October 11, 1917 ndash;present specialization= Infantry… …   Wikipedia

• Non-trophic networks — Any action or influence that species have on each other is considered a biological interaction. These interactions between species can be considered in several ways. One such way is to depict interactions in the form of a network, which… …   Wikipedia

• Tulsa Metropolitan Area — See also: Green Country Tulsa Metropolitan Area U.S. Census Bureau Areas Tulsa Metropolitan Area …   Wikipedia

• Italy — /it l ee/, n. a republic in S Europe, comprising a peninsula S of the Alps, and Sicily, Sardinia, Elba, and other smaller islands: a kingdom 1870 1946. 57,534,088; 116,294 sq. mi. (301,200 sq. km). Cap.: Rome. Italian, Italia. * * * Italy… …   Universalium

• DuPont — This article is about E.I. du Pont de Nemours and Company. For other uses, see Dupont (disambiguation). E. I. du Pont de Nemours and Company Type Public Traded as NYSE:  …   Wikipedia

• Food web — A freshwater aquatic and terrestrial food web. A food web (or food cycle) depicts feeding connections (what eats what) in an ecological community. Ecologists can broadly lump all life forms into one of two categories called trophic levels: 1) the …   Wikipedia

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• motion picture, history of the — Introduction       history of the medium from the 19th century to the present. Early years, 1830–1910 Origins       The illusion of motion pictures is based on the optical phenomena known as persistence of vision and the phi phenomenon. The first …   Universalium

• key — key1 /kee/, n., pl. keys, adj., v., keyed, keying. n. 1. a small metal instrument specially cut to fit into a lock and move its bolt. 2. any of various devices resembling or functioning as a key: the key of a clock. 3. See key card. 4. something… …   Universalium