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Top 100 Gadgets That Changed the World
floor and tight corners while avoiding obstacles in its way. Roomba can also return to its docking station with a press of a button. 71. Franklin Rolodex Electronics REX PC Companion Running an operating
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100 Famous Inventors and Their Best Invention Ideas
us now, but the structure he built is the oldest hewn stone monument in existence. The pyramid has six steps and it stands at an imposing height of 200 feet. If he was alive today, he would probably be