Mass communication and journalism is the academic study of the various means by which individuals and entities communicate information to large audiences at the same time. Its a thoughtful analysis of how mass media messages are constructed and construed rounds out the coverage. It is usually understood to relate to newspaper, magazine, and book publishing, as well as radio, television and film, as these mediums are used for disseminating information, news and advertising. Mass communication differs from the studies of other forms of communication, such as interpersonal communication or organizational communication, in that it focuses on a single source transmitting information to a large group of receivers. The study of mass communication and journalism is chiefly concerned with how the content of mass communication persuades or otherwise affects the behaviour, attitude, opinion, or emotion of the person or people receiving the information. Mass communication and journalism is a branch of social science and humanities that falls under the larger umbrella of communication studies or communication. The history of communication moves from prehistoric forms of art and writing through modern communication methods such as the internet. Mass communication fits in when humans began to be able to transmit messages from a single source to multiple receivers. Mass communication has moved from theories such as the hypodermic needle model through more modern theories such as computer-mediated communication. In the United States, the study of mass communication is often associated with the practical applications of journalism, television and radio broadcasting, film, public relations, or advertising. With the diversification of media options, the study of communication has extended to include social media and new media, which have stronger feedback models than traditional media sources. The study of journalism involves looking at how news is produced, and how it is disseminated to the public through mass media outlets such as newspapers, news channel, radio station, television station, and more recently, e-readers and smartphones.