The QWERTY layout used on typewriters and computer keyboards was devised by
Answer: A
Christopher Sholes devised it.
He arranged the keys of his 1873 typewriter so that letters often typed in succession sat far apart on the typebar basket, which stopped the bars from jamming. The layout survived the mechanism it was designed for.
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This statesman, scholar and inventor, an early President of the United States, invented the swivel chair, the spherical sundial, the mouldboard plough and the cipher wheel. Who was he?
Answer: D
He was Thomas Jefferson.
The third President invented a swivel chair, on which he is said to have drafted the Declaration of Independence, a spherical sundial, an improved mouldboard plough and a wheel cipher. He never patented anything, holding that ideas should be free.
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Who invented the first controllable flying AEROPLANE (AIRPLANE)?
Answer: A
The Wright brothers did.
Wilbur and Orville flew the Wright Flyer at Kitty Hawk on 17 December 1903, covering 37 m in twelve seconds. Others had flown before, but the Wrights were first to achieve controlled flight, through their system of wing-warping for roll.
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Who invented the first personal computer controlled with a keyboard and used by one person?
Answer: A
IBM made it.
The IBM 610 Auto-Point Computer of 1957 was the first machine designed to be operated by one person at a keyboard. It cost $55,000 and was programmed by punched paper tape.
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When were blue jeans invented?
Answer: D
They were invented in the 1850s.
Levi Strauss was selling sturdy trousers to miners in California from 1853, and with the tailor Jacob Davis patented the use of copper rivets at the stress points in 1873. The rivets are what made them jeans rather than merely trousers.
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Famous musical invention of George Beauchamp which is part of modern music is
Answer: D
It is the electric guitar.
George Beauchamp designed the Frying Pan in 1931 with Adolph Rickenbacker, using an electromagnetic pickup to sense the strings' vibration rather than a soundbox. Every electric guitar since works on that principle.
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World Wide Web was publicly introduced for first time in
Answer: B
It was introduced publicly in 1990.
Tim Berners-Lee wrote the first browser and server at CERN in late 1990, and the Web was opened outside CERN in 1991. CERN placed the technology in the public domain in 1993.
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First practical fluorescent lamp was invented in 1941 by
Answer: B
George Inman invented it.
He led the General Electric team that produced the first practical fluorescent lamp in 1938. A discharge through mercury vapour emits ultraviolet, which a phosphor coating converts to visible light - three times as efficient as a filament lamp.
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Which vehicle was invented about 3000 BCE?
Answer: D
It was the chariot.
The spoked-wheel chariot appeared on the Eurasian steppe about 2000 BC, and solid-wheeled carts a thousand years earlier. It transformed warfare, and remained the fastest thing on land for two thousand years.
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First car made with Teetor's cruise control method was the
Answer: B
It was the Chrysler Imperial.
Ralph Teetor, who was blind, devised cruise control after being irritated by his lawyer's uneven driving. It appeared on the 1958 Chrysler Imperial under the name Auto-Pilot.
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