Television

Television is one of the greatest technological inventions of the 20th century. A Scottish man called John Logie Baird invented it. Inventors in the USA and Europe were working on electronic television systems but Baird used a mechanical system. In 1925, he was able to send the first black and white picture-of head of a doll-from one end of his flat to the other. He then used a local office boy, not the doll, and this teenager was the first person ever to appear on TV. 

More and more people had televisions after the Second World War. Colour TV began in the USA in the 1940s but only a small number of people had colour television in their houses. They were very expensive. In Britain and the USA, the first regular colour TV programmes only began in 1967.
Now, in 21st century, we have digital television. TV has changed a lot since the face of a boy appeared on TV in John Logie Baird's flat!