Cable television in the context of Comcast Business

A television show, TV program (British English: programme), or simply a TV show, is the general reference to any content produced for viewing on a television set that is transmitted via over-the-air, satellite, and cable, or distributed digitally on streaming platforms. This generally excludes breaking news or advertisements that are aired between shows or between segments of a show. A regularly recurring show is called a television series, and an individual segment of such a series is called an episode. Content is produced either in-house on a television stage with multiple cameras or produced by contract with film production companies. Episodes are usually broadcast in annual sets, which are called seasons in North America and series in other regions. A one-off television show may be called a television special, while a show with a limited number of episodes is a miniseries. A television film, or telefilm, is a feature film produced for broadcast by a terrestrial or cable network.

Television shows by terrestrial and cable networks are most often scheduled for broadcast ahead of time and appear on electronic guides or other TV listings. The rise of streaming television, however, has made television schedules less relevant than in earlier decades. Some programming may be aired live—that is, events are broadcast at the time they happen rather than at a later time or date—but the vast majority of programming is produced ahead of time. Originally, viewers had no practical way to record a show for later viewing; this changed with the advent of home video, first in the form of videotape recorded on VCRs and later in the form of digital video recorders. Cable television providers began offering certain programming "pay-per-view" or on-demand, with viewers paying a one-time fee to watch a program at a time of their own choosing. Streaming television allows viewers to watch programming at any time with a subscription to the OTT platform service.

Broadcasting is the distribution of audio and audiovisual content to dispersed audiences via an electronic mass communications medium, typically using the electromagnetic spectrum (radio waves), in a one-to-many model. Broadcasting began with AM radio, which became popular around 1920 with the spread of vacuum tube radio transmitters and receivers. Before this, most implementations of electronic communication (early radio, telephone, and telegraph) were one-to-one, with the message intended for a single recipient. The term broadcasting evolved from its use as the agricultural method of sowing seeds in a field by casting them broadly about. It was later adopted for describing the widespread distribution of information by printed materials or by telegraph. Examples applying it to "one-to-many" radio transmissions of an individual station to multiple listeners appeared as early as 1898.

Over-the-air broadcasting is usually associated with radio and television, though more recently, both radio and television transmissions have begun to be distributed by cable (cable television). The receiving parties may include the general public or a relatively small subset; the point is that anyone with the appropriate receiving technology and equipment (e.g., a radio or television set) can receive the signal. The field of broadcasting includes both government-managed services such as public radio, community radio and public television, and private commercial radio and commercial television. The U.S. Code of Federal Regulations, title 47, part 97 defines broadcasting as "transmissions intended for reception by the general public, either direct or relayed". Private or two-way telecommunications transmissions do not qualify under this definition. For example, amateur ("ham") and citizens band (CB) radio operators are not allowed to broadcast. As defined, transmitting and broadcasting are not the same.

MTV (originally an initialism of Music Television) is an American cable television channel and the flagship property of the MTV Entertainment Group, a sub-division of the Paramount Media Networks division of Paramount Skydance. Launched on August 1, 1981, the channel originally aired music videos and related music entertainment programming guided by television personalities known as video jockeys (VJs). MTV soon began establishing its presence overseas, eventually gaining an unprecedented cult following and becoming one of the major factors in cable programming's rise to fame, leading American corporations to dominate the television economy in the 1990s.

In the years since its inception, the channel significantly toned down its focus on music in favor of original reality programming for teenagers and young adults. As of November 2023, MTV is available to approximately 67 million pay television households in the United States, down from its 2011 peak of 99 million households.

Terrestrial television, or over-the-air television (OTA) is a type of television broadcasting in which the content is transmitted via radio waves from the terrestrial (Earth-based) transmitter of a TV station to a TV receiver having an antenna. The term terrestrial is more common in Europe and Latin America, while in Canada and the United States it is called over-the-air or simply broadcast. This type of TV broadcast is distinguished from newer technologies, such as satellite television (direct broadcast satellite or DBS television), in which the signal is transmitted to the receiver from an overhead satellite; cable television, in which the signal is carried to the receiver through a cable; and Internet Protocol television, in which the signal is received over an Internet stream or on a network utilizing the Internet Protocol. Terrestrial television stations broadcast on television channels with frequencies between about 52 and 600 MHz in the VHF and UHF bands. Since radio waves in these bands travel by line of sight, reception is generally limited by the visual horizon to distances of 64–97 kilometres (40–60 miles), although under better conditions and with tropospheric ducting, signals can sometimes be received hundreds of kilometers distant.

Terrestrial television was the first technology used for television broadcasting. The BBC began broadcasting in 1929 and by 1930 many radio stations had a regular schedule of experimental television programmes. However, these early experimental systems had insufficient picture quality to attract the public, due to their mechanical scan technology, and television did not become widespread until after World War II with the advent of electronic scan television technology. The television broadcasting business followed the model of radio networks, with local television stations in cities and towns affiliated with television networks, either commercial (in the US) or government-controlled (in Europe), which provided content. Television broadcasts were in greyscale (called black and white) until the transition to color television in the 1960s.

Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location. The signals are received via an outdoor parabolic antenna commonly referred to as a satellite dish and a low-noise block downconverter.

A satellite receiver decodes the desired television program for viewing on a television set. Receivers can be external set-top boxes, or a built-in television tuner. Satellite television provides a wide range of channels and services. It is usually the only television available in many remote geographic areas without terrestrial television or cable television service. Different receivers are required for the two types. Some transmissions and channels are unencrypted and therefore free-to-air, while many other channels are transmitted with encryption. Free-to-view channels are encrypted but not charged-for, while pay television requires the viewer to subscribe and pay a monthly fee to receive the programming.

An over-the-top media service, also known as over-the-top television (OTT), is a digital distribution service of video and audio delivered directly to viewers via the public Internet, rather than through an over-the-air, cable, satellite, or IPTV provider. The term is synonymous with streaming platform.

OTT services may be subscription-based or free, and are typically accessed via television sets with integrated Smart TV platforms, streaming devices such as Apple TV, Amazon Fire TV and Roku, video game consoles, websites on personal computers, and apps on smartphones and tablets.

A television film (also known as television movie, telefilm, telemovie, made-for-TV film/movie, or TV film/movie) is a film with a running time similar to a feature film that is produced and originally distributed by or to a terrestrial or cable television network. It is in contrast to theatrical films first shown in movie theaters, direct-to-video films released only in home video formats, and films released on or produced for streaming platforms.

In certain cases, a television film may also be shown, and referred to, as a miniseries, which typically indicates that it has been divided into multiple parts or a series that contains a predetermined, limited number of episodes.

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 or satellite television provider to its viewers on a dedicated channel. EPGs are transmitted by specialized video character generation (CG) equipment housed within each such provider's central headend facility. By tuning into an EPG channel, a menu is displayed that lists current and upcoming television shows on all available channels.

TV listings (television listings, also sometimes called a TV guide or program/programme guide) are a printed or electronic timetable of television programs. Often intended for consumer use, these provide information concerning programming scheduled to be broadcast on various television channels available to the reader – either via terrestrial, free-to-air, cable, satellite or over-the-top MVPD – indicating at what time and on what channel they are due to be broadcast over a period usually encompassing about seven- to 14-days in advance.

Streaming television is the digital distribution of television content, such as films and series, over the Internet. In contrast to over-the-air, cable, and satellite transmissions, or IPTV service, streaming television is provided as over-the-top media (OTT). Television content includes productions made by or for OTT services, and acquired by them with licensing agreements. The length of a streaming television series episode can be anywhere from thirty to sixty minutes (some episodes may be longer).

Of the top streaming platforms, Netflix had over 301 million subscribers as of December 2024, making it the most popular global streaming television platform. In 2024, streaming television became "the dominant form of TV viewing" in the United States. It surpassed cable and network television viewing in 2025.

A digital video recorder (DVR), also referred to as a personal video recorder (PVR) particularly in Canadian and British English, is an electronic device that records video in a digital format to a disk drive, USB flash drive, SD memory card, SSD or other local or networked mass storage device. The term includes set-top boxes (STB) with direct to disk recording, portable media players and TV gateways with recording capability, and digital camcorders. Personal computers can be connected to video capture devices and used as DVRs; in such cases the application software used to record video is an integral part of the DVR. Many DVRs are classified as consumer electronic devices. Similar small devices with built-in (~5 inch diagonal) displays and SSD support may be used for professional film or video production, as these recorders often do not have the limitations that built-in recorders in cameras have, offering wider codec support, the removal of recording time limitations and higher bitrates.

In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. The term applies when the conductors are long enough that the wave nature of the transmission must be taken into account. This applies especially to radio-frequency engineering because the short wavelengths mean that wave phenomena arise over very short distances (this can be as short as millimetres depending on frequency). However, the theory of transmission lines was historically developed to explain phenomena on very long telegraph lines, especially submarine telegraph cables.

Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas (they are then called feed lines or feeders), distributing cable television signals, trunklines routing calls between telephone switching centres, computer network connections and high speed computer data buses. RF engineers commonly use short pieces of transmission line, usually in the form of printed planar transmission lines, arranged in certain patterns to build circuits such as filters. These circuits, known as distributed-element circuits, are an alternative to traditional circuits using discrete capacitors and inductors.

Coaxial cable, or coax (pronounced /ˈkoʊ.æks/), is a type of electrical cable consisting of an inner conductor surrounded by a concentric conducting shield, with the two separated by a dielectric (insulating material); many coaxial cables also have a protective outer sheath or jacket. The term coaxial refers to the inner conductor and the outer shield sharing a geometric axis.

Coaxial cable is a type of unbalanced transmission line, used to carry high-frequency unbalanced electrical signals with low losses. It is used in such applications as telephone trunk lines, broadband internet networking cables, high-speed computer data buses, cable television signals, and connecting radio transmitters and receivers to their antennas. It differs from other shielded cables because the dimensions of the cable and connectors are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a transmission line.

Television broadcasts in the United Kingdom began in 1932, however, regular broadcasts would only begin four years later. Television began as a public service which was free of advertising, which followed the first demonstration of a transmitted moving image in 1926. Currently, the United Kingdom has a collection of free-to-air, free-to-view and subscription services over a variety of distribution media, through which there are over 480 channels for consumers as well as on-demand content. There are six main TV channel owners who are responsible for most material viewed.

There are 27,000 hours of domestic content produced a year, at a cost of £2.6 billion. Since 24 October 2012, all television broadcasts in the United Kingdom have been in a digital format, following the end of analogue transmissions in Northern Ireland. Digital content is delivered via terrestrial, satellite and cable, as well as over IP. As of 2003, 53.2% of households watch through terrestrial, 31.3% through satellite, and 15.6% through cable.