The document provides an overview of different sectors within the media industry, including their structures and job roles. It discusses the television sector as the largest and fastest growing, employing over 50,000 people in the UK. The radio sector is described as one of the oldest mass media forms that can be accessed virtually anywhere. The film industry is dominated by major companies and is very profitable. Other sectors covered include video games, animation, and publishing. Common characteristics across the different media sectors are that they are sensitive to technological changes, operate globally and locally, and create both information and entertainment.