What technical inventions appeared in the 20th century?

The 20th century was incredibly rich in technical inventions. This is a century of breakthrough and scientific and technological revolution, and therefore there were so many inventions that only the brightest can be listed. In this century, man “learned to fly” – the airplane was invented. X-rays were also invented. In the same century, the usual television, mobile phone, computer (or computer) appeared. This century gave us a worldwide network called the Internet. The 20th century really set the trends for our century, the twenty-first century.