Lists appear at the end of each year, the years gadgets, succeses, news stories, films, books...an so on. I thought I'd take a different route and cover the entire century which would be the some of the most important innovations. These are in no particular order: The Airplane - unbeatable speed - and what a view Radio Broadcasting - providing news quickly that changed the world in the 20's. Nuclear Power - A source of energy that does not follow the short-sighted spirited of the times Integrated Circuits - invented in 1958, becoming even smaller and smarter Space Rockets - The sky is not the limit The Mobile Phone - basic accessory that is assuming increasing importance The Internet - the new backbone of society, now assuming the convolutions of the brain. Gene Technology - precision in plant cultivation and animal breeding has become a daily fodder. This by no means is the definitive list as there may be more such as laser or the radar. Anyway, the question is which one of these significant innovation(or any other) you couldn't do without in today's world?