Radio

Radio  by Nathan B Stubblefield, Nicola Tesla and Marconi 

 It was the first delivery of instant information that wasn't yelled from a street corner or reduced to print. Radio reporting put the European battles in the American living room. Presidents used it to speak directly to the public, not having to go through reporters.  It transformed sports coverage and delivered music and entertainment to the masses-for free. It was also vital to commerce and advertising.  TV and internet followed, but radio started the instant delivery game.

Nominated by Al Tompkins, teacher/journalist, Poynter Institute.