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commando

(Encyclopedia)commando, small, elite military raiding and assault unit or soldier. Although the word was coined in the Boer War (1899–1902), the role is as old as battles themselves. In 1940, when the British org...

Clarke, Arthur C.

(Encyclopedia)Clarke, Arthur C. (Sir Arthur Charles Clarke), 1917–2008, British science fiction writer. During World War II he served as a radar instructor and aviator in the Royal Air Force. After the war he obt...

plumbing

(Encyclopedia)plumbing, piping systems inside buildings for water supply and sewage. The Romans had a highly developed plumbing system; water was brought to Rome by aqueducts and distributed to homes in lead pipes�...

stealth technology

(Encyclopedia)stealth technology, designs and materials engineered for the military purpose of avoiding detection by radar or any other electronic system. Stealth, or antidetection, technology is applied to vehicle...

acceleration

(Encyclopedia)acceleration, change in the velocity of a body with respect to time. Since velocity is a vector quantity, involving both magnitude and direction, acceleration is also a vector. In order to produce an ...

internal-combustion engine

(Encyclopedia)CE5 Internal-combustion engines: In the four-stroke reciprocating engine (above), a mixture of fuel and air is taken into the chamber on the down-stroke of the piston, is compressed on the up-strok...

smog

(Encyclopedia)smog smŏg [key] [smoke+fog], dense, visible air pollution. Smog is commonly of two types. The gray smog of older industrial cities like London and New York derives from the massive combustion of coal...

Tribal Areas

(Encyclopedia)Tribal Areas, officially the Federally Administered Tribal Areas (FATA), former administrative region, 10,510 sq mi (27,220 sq km), NW Pakistan, comprising seven agencies (or tribal areas) and six gen...

Yost, Ed

(Encyclopedia)Yost, Ed (Paul Edward Yost), 1919–2007, American balloonist, b. Bristow, Iowa, grad. Boeing School of Aeronautics, 1940. The father of modern hot-air ballooning, Yost pioneered the used of propane (...

Qeqertarsuaq

(Encyclopedia)Qeqertarsuaq gôᵺˈhoun [key], town (1996 pop. 1,095), Qeqertarsuaq dist., W Greenland, on Disko Island; founded in 1773. A fishing base and former whaling base, it has a geophysical observatory and...