So far man invented many inventions.such as current,technology,internet,computer,television,electricity. we cant imagine our lives without these inventions in our life. now a days technology play a key role in every aspect of a humans life. A doctor need technology,a engineer need technology,a contractor need technology. these inventions in medical society are saving many lives.so hats off to all our scientists .THANK YOU ALL FOR THESE GREAT INVENTIONS.