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An Electronic Program(me) Guide (EPG) or also an Interactive Program(me) Guide (IPG) or Electronic Service Guide (ESG), is an on-screen guide to scheduled broadcast television programs, allowing a viewer to navigate, select, and discover content by time, title, channel, genre, etc, by use of their remote control, a keyboard or even a phone keypad.

The technology is based upon broadcasting data to an application usually residing within middleware in a set-top box which connects to the television set and enables the application to be displayed. The technology is predominant in the digital television and radio world, but equally EPGs exist that rely upon analogue technology (using the VBI—or vertical blanking interval). These signals may arrive via cable TV, satellite TV, cable radio, satellite radio, or via over-the-air terrestrial broadcast stations.

By navigating through an EPG on a receiving device, users can see more information about the current program and about future programs. When EPGs are connected to PVRs, or personal video recorders they enable a viewer to plan his or her viewing and record broadcast programs to a hard disk for later viewing.

Typical elements of an EPG comprise a graphical user interface which enable the display of program titles, descriptive information such as a synopsis, actors, directors, year of production, and so on, the channel name and the programs on offer from subchannels such as pay-per-view and VOD or video-on-demand services, program start times, genres and other descriptive metadata. The information is typically displayed on a grid with the option to select more information on each program. Radio EPGs offer simpler, more text-based displays of artist, album and track title information.

An EPG allows the viewer to browse program summaries, search by genre or channel, immediate access to the selected program, reminders, and parental control functions. If the device is capable of it, an EPG can enable one-touch recording of programs, as some DirecTV IRDs can do with a VCR using an attached infrared emitter (which emulates a remote control).

EPGs are typically sent within the broadcast transport stream or alongside it in a special data channel. The ATSC standard for DTV uses tables sent in each station's PSIP, for example. These tables are meant to contain the program start time and title, and additional program descriptive "metadata". In the U.S., these devices receive time signals from local PBS members, so that they can record on time. Most systems, however, rely upon third party "metadata aggregators" (companies such as Tribune TV Data, Gemstar TV Guide in the U.S. and Europe and Broadcasting Dataservices in Europe), to provide good quality data content. Newer media centres (PC based multi-channel TV recorders) and Digital Video Recorders may use an internet feed for the EPG. This enables two-way interactivity for the user so that media download can be requested via the EPG, or related link, and remote programming of the media centre can be achieved . An example is IceTV. For another example of an EPG system see Guide Plus+.

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