A talk show is a radio or television program where one or more hosts discuss current issues or other topics with guests. Many talk shows (especially those on radio) allow members of the public to join in, through telephone calls, letters, e-mail and Internet chat. Talk shows are often meant to entertain, and many feature comedy or performing. Many shows, though, do a , by informing the public and discussing issues openly. While some are locally based, and serve only one station's audience, others become and play on many stations, or are broadcast by a regional or national network.