Copied from Popular Mechanics, July 2011, without Permission
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To make our list of 101, a gadget had to be something you could hold in your hands, mechanical or electronic, and a mass-produced personal item. The rest was up to the judges. Check out our selections, and watch the 101 Gadgets TV special on History, premiering June 15.
Read more: 101 Gadgets That Changed The World - Top 101 Gadgets of All Time - Popular Mechanics