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[[File:Mythbuntu Program Guide.png|thumb|330px|right|Electronic programming guide interface in [[MythTV]].]]
'''Electronic programming guides''' ('''EPGs''') and '''interactive programming guides''' ('''IPGs''') are menu-based systems that provide users of [[television]], [[radio]], and other media applications with continuously updated menus that display scheduling information for current and upcoming [[broadcast programming]] (most commonly, [[TV listings]]). Some guides also feature backward scrolling to promote their catch up content. They are commonly known as '''guides''' or '''TV guides'''.
Non-interactive electronic programming guides (sometimes known as "navigation software") are typically available for television and radio, and consist of a digitally displayed, non-interactive menu of programming scheduling information shown by a [[cable television|cable]] or [[satellite television]] provider to its viewers on a dedicated channel. EPGs are transmitted by specialized video [[Character generator|character generation]] (CG) equipment housed within each such provider's central [[cable television headend|headend]] facility. By tuning into an EPG channel, a menu is displayed that lists current and upcoming [[television shows]] on all available channels.
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