Presenting profiles of the mathematicians, engineers, and other scientists who helped create and develop communications technologies, Bray (Imperial College London) begins his volume in the mid-18th century, looking at people like Ampere, Ohm, Faraday, and Hertz, who created the mathematical and scientific foundations of telecommunications. He proceeds to offer chapters on telegraph and cable engineers, telephone engineers, inventors of the thermionic valve, pioneers of radio and television broadcasting, microwave radio-relay engineers, the inventors of the transistor and the microchip, the creators of information theory and digital techniques, satellite communication engineers, pioneers optical fiber communications, and inventors of the Internet and mobile communications. Annotation copyrighted by Book News, Inc., Portland, OR