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51World War I — the war fought mainly in Europe and the Middle East, between the Central Powers and the Allies, beginning on July 28, 1914, and ending on November 11, 1918, with the collapse of the Central Powers. Abbr.: WWI Also called Great War, War of the… …
52P-38 Lightning — infobox Aircraft name =P 38 Lightning type =Heavy fighter manufacturer =Lockheed caption = designer =Kelly Johnson first flight =27 January 1939 introduction = 1941 retired = 1949 primary user = United States Army Air Force more users = produced …
53Vietnam War — Part of the Cold War and the Indochina Wars …
54History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
55List of Doctor Who villains — The War Chief redirects here. For the Age of Empires III expansion pack, see Age of Empires III: The War Chiefs. Zaroff redirects here. For the fictional Richard Connell villain, see The Most Dangerous Game. This is a list of villains from the… …
56international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
57HMS Dreadnought (1906) — For other ships of the same name, see HMS Dreadnought. Dreadnought at sea; note the torpedo net booms folded against her side Class overview Name …
58mathematics — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… …
59Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
60B-17 Flying Fortress — Infobox Aircraft name= B 17 Flying Fortress caption= This TB 17G was assigned various USAAF training commands type= Strategic bomber national origin = United States manufacturer= Boeing first flight= 28 July 1935cite web |url=… …
