Commercial radio is radio programming that is privately owned and funded through advertising revenue, as opposed to public radio which is state-sponsored. It originated in the United States in the 1920s and relies heavily on advertising for the majority of its income. Some examples of national commercial radio stations in the UK include Classic FM, Absolute Radio, and TalkSport. Local commercial radio stations also exist and are owned by larger media groups like Global, which owns stations such as Heart and Capital. Radio advertisements come in various forms and are targeted towards certain demographics.