What media discovery or invention has made the greatest impact on society today?

Inventions are most salient when we can see the historical changes they cause. Some permanently change our lives almost overnight and some disappear as soon as they are patented because these was never a real need for them. Over the last century, there have been thousands of patented ideas around the world and many are exciting and completely life changing.

Computer has made the greatest impact on society today. A computer is a device that can be instructed to carry out an arbitrary set of arithmetic or logical operations automatically. The ability of computers to follow generalized sequences of operations, called programs, enable them to perform a wide range of tasks. Historically, computers were human clerks who calculated in accordance with effective methods. These human computers did the sorts of calculation nowadays carried out by electronic computer, and many thousands of them were employed in commerce, government, and research establishments.

Computer has made the greatest impact in our daily life as well as in our social life. Any professional individual like doctors, engineers. businessman etc, undergo a change in their style or working pattern after they get the knowledge of computer. The managerial level becomes less dependent on low level staff like clerks and accountants. Their accessibility to the information increases tremendously. This improves their working patterns, which benefit the organization and ultimately affects the society. In common life also, an individual gets benefit with computer technology. When airports, hospitals, banks, departmental stores have been computerized, people get quick service due to the computer system.

In general, computers have proved almost all the fields whether related to numeric, non numeric or document processing in the developed countries and all the walks of life.


Source: 
https://plato.stanford.edu/entries/computing-history/
https://en.wikipedia.org/wiki/Computer
https://www.linkedin.com/pulse/impact-computer-society-muhammad-ibtehaj-khan