¡°Technological change had placed communication in the front lines of a social revolution.¡±
             Our work, lives, and society have been changed by new technological innovations. Maybe the most affected area by new technologies is human communication area. And these technologies are called communication technologies, which offer increasing efficiency and connectivity for business, governments, and individuals. New communication technologies are being introduced at an incredible rate, and are affecting human communication with deep impact.
             Technological changes in the media are deeply interrelated to social change. Recent changes in communications technologies have been paralleled by social trends such as globalisation, commercialisation, and individualisation.
             To give a context to the new technological innovations of human communication, we will look at the mass communications media of the radio, television broadcasting, cable television, satellites, and finally computer communication technology. The focus of attention is the interaction of social, technical and commercial factors.
             In Chapter 1, firstly a topic is about radio broadcasting and then in Chapter 2, a subject of television broadcasting is followed. In Chapter 3, cable television and satellite, that are spin-offs of radio and television technology, are discussed. Finally in Chapter 4, the essay will discuss about computer communication technology that gives rise to Information Ages.
             Radio and television were major factors of social change in the 20th century. But it was radio that once the centre for family entertainment and news. Television just enhanced this revolution by adding sight to sound. It was radio that was the first method of instantaneous mass communication.
             Radio grew out of pre-existing technologies- telegraph, developed at mid-century, and the telephone, invented a few decades later. The first steps toward inventing radio inv...