What inventions in the history of manking do you regard as most important?

I believe that a lot of important discoveries were made in the last century. The TV was invented in the last century. People watch news on TV Radio was invented in the last century. People listen to interesting music on the radio. A personal computer was invented in the last century. People work behind a personal computer. People can not live without a computer now. An important discovery is a car. People can not live without a car. People move by car over long distances. I like to drive by car, not by public transport.