Terrestrial radio uses analogue and digital signals to broadcast music, news, and entertainment to wide audiences through radio stations. There are three main types of terrestrial radio services: conventional, digital, and trunking. Digital audio broadcasting (DAB) is a digital radio technology used internationally to broadcast radio stations. Broadcasts can be live, as-live, or recorded, and include music, speech, commercials, and dramas. Non-broadcast products include podcasts that can be downloaded, internet radio that streams online, and in-store radio for businesses.