Technoworld: Satellites And Communications

What is a satellite? How does a satellite work? What is an e-mail? How do mobile phones work? How are live pictures and sounds transmitted across the world?

Communications have come a long way since the telephone was invented in 1876! This book explains in simple terms the different kinds of communications we use today, from video phones, interactive television and the Internet to satellite links that can do anything from transferring telephone calls to telling ships and travellers their exact position anywhere on Earth.