Telecommunications is a general term for a broad range of technologies used to convey information over distances both great and small. The public switched telephone system, mobile telephony, satellite communications, computer networks, the Internet, and radio and television brodcasting services all fall under the general heading of telecommunications. Although most of us tend to associate the term with modern technologies, telecommunication has been around in some form or another since ancient times. The discovery of electricity in the nineteenth century led to the invention of the telegraph, and later the telephone, enabling communications to occur in real time over great distances. Immense strides in the development of communications technology in just the last few decades have changed our leisure activities, the way we work, and the way we perceive the world in which we live. An understanding of these technologies, how they work, their impact on society, the economic implications they engender, and where they will lead us in the future are therefore of considerable importance to us.