Terrestrial radio is land-based radio that provides listeners with music, talk and news. Digital audio broadcasting is a transmission technology designed in the 1980s to bring digital benefits to analog radio. News and features packages are the longest type of storytelling found on television newscasts and some long-form news programming. Podcasts are digital media files that can be audio, video or PDF files subscribed to and downloaded through web syndication or streamed online. MP3 is an audio encoding format for playing digital audio files.