Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum, in a one-to-many model. Broadcasting began with AM radio, which came into popular use around 1920 with the spread of vacuum tube radio transmitters and receivers. Before this, most implementations of electronic communication were one-to-one, with the message intended for a single recipient. The term broadcasting evolved from its use as the agricultural method of sowing seeds in a field by casting them broadly about. It was later adopted for describing the widespread distribution of information by printed materials or by telegraph. Examples applying it to "one-to-many" radio transmissions of an individual station to multiple listeners appeared as early as 1898.
A broadcasting antenna in Stuttgart
A television studio production control room in Olympia, Washington, August 2008
An "On Air" sign is illuminated, usually in red, while a broadcast or recording session is taking place.
Radio Maria studio in Switzerland
In communication, media are the outlets or tools used to store and deliver content; semantic information or subject matter of which the media contains. The term generally refers to components of the mass media communications industry, such as print media, publishing, news media, photography, cinema, broadcasting, digital media, and advertising.
Ranking Digital Rights indicator scores for policy transparency in regard to their terms of service enforcement (which impact upon content or account restrictions)