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I recently watch a documentary with the above title made according to the opinion of a panel of experts. http://www.popularmechanics.com/technology/gadgets/reviews/101-gadgets-that-changed-the-world .
I list below in decreasing order of importance their top ten choices for your information, thoughts, and deliberation:
1.The smart phone
2.Radio
3.Television
4.Hypodermic Needle
5.The personal computer
6.Air conditioner
7.Telephone
8.Phonograph
9.Alarm clock
10.Light bulb
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