Alexander Graham Bell: Invented the first telephone. Bell's invention changed the way Americans communicated.
http://www.alexandergrahambell.org/
Thomas Edison: Thomas Alva Edison was an American inventor who developed several devices like the electric light bulb and the phonograph. The phonograph was the first machine to record a voice and say it back.
http://www.thomasedison.com/
Wright Brothers: The Wright brothers, Orville and Wilbur, were two Americans credited with inventing and building the world's first successful airplane and making the first controlled, powered and sustained heavier-than-air human flight, on December 17, 1903. In the two years afterward, the brothers developed their flying machine into the first practical fixed-wing aircraft. Although not the first to build and fly experimental aircraft, the Wright brothers were the first to invent aircraft controls that made fixed-wing powered flight possible.
http://www.wright-house.com/wright-brothers/Wrights.html
Albert Einstein: The name Einstein is synonymous with genius. He is responsible for the special and general theory of relativity, and his work on the photoelectric effect. He also invented a few devices like Einstein calculator.
http://nobelprize.org/nobel_prizes/physics/laureates/1921/einstein-bio.html
Johann Gutenberg: Johann Gutenberg is known as the man who was the first European to use movable type printing, in around 1439, but more importantly he was the one who invented mechanical printing.
http://www.middle-ages.org.uk/johann-gutenberg.htm
Isaac Newton: Isaac Newton was the one to discover gravity. Newton is known for his theories about the phenomenon of universal gravitation and also propounded the three famous laws of motion.
http://scienceworld.wolfram.com/biography/Newton.html
Tim Berners-Lee: Well, if imagining a life without computers was impossible for some of you, then think about a life without good ol’ Internet! Kudos to the man who invented the Internet. Sir Timothy John Berners-Lee is an English computer scientist, who invented the World Wide Web On December 25, 1990.
http://www.livinginternet.com/w/wi_lee.htm
George Washington Carver: George Washington Carver was an agricultural chemist who invented three hundred uses for peanuts and hundreds more uses for soybeans, pecans and sweet potatoes; and changed the history of agriculture in the south.
http://www.black-inventor.com/George-Washington-Carver.asp
Eli Whitney: Eli Whitney invented the cotton gin in 1794. The cotton gin is a machine that separates seeds, hulls and other unwanted materials from cotton after it has been picked.
Henry Ford: Henry Ford improved the "assembly line" for automobile manufacturing, received a patent for a transmission mechanism, and popularized the gas-powered car with the Model-T.
