Mass meia is a term used to denote a section of the media specifically envisioned and designed to reach a very large audience such as the population of a nation state. It was coined in the 1920s with the advent of nationwide radio networks, mass-circulation newspapers and magazines, although mass media were present centuries before the term became common. The term public media has a similar meaning: it is the sum of the public mass distributors of news and entertainment across media such as newspapers, television, radio, broadcasting, which may require union membership in some large markets such as Newspaper Guild, AFTRA, & text publishers. The concept of mass media is complicated in some internet media as now individuals have a means of potential exposure on a scale comparable to what was previously restricted to select group of mass media producers. These internet media can include television, personal web pages, message boards, podcasts and blogs.