Radio

Marconi was the first to develop the commercial potential of wireless, and radio moved quickly from a curiosity to a necessity in shipping and the military. The entertainment potential was uncertain at first, especially given the high cost of equipment at the beginning, but news and music expanded into the airwaves. The transistor radio brought wireless to the entire world, bringing us together but leaving us apart. If you don't like a station, you can tune it out and another in. Radio created a new kind of community, and a new level of sponsorship advertising.