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===Televisio===
<!--Televisionkuvan, faksien jne. datan siirtoon pitkiä matkoja käytetään 1960-luvun alusta alkaen myös tietoliikennesatelliitteja.-->
<!--Käännettävää (ja tiivistettävää) tekstiä englanninkielisen Wikipedian puolelta. Tekstiä pitäisi lyhentää jonkin verran sekä lisätä TV:n tulo Suomeen jne.
The development of television technology can be partitioned along two lines: those developments that depended upon both mechanical and electronic principles, and those which are purely electronic. From the latter descended all modern televisions, but these would not have been possible without discoveries and insights from the mechanical systems.
===Broadcast television===
[[ImageKuva:Television Antenna.jpg|thumb|200px|Television antenna on a rooftop]]
The first long distance [[public television]] broadcast was from [[Washington, DC]] to [[New York City]] and occurred on [[April 7]], [[1927]]. The image shown was of then Commerce Secretary [[Herbert Hoover]]. The first analogue service was WGY, [[Schenectady]], [[New York]] inaugurated on [[May 11]] [[1928]]. The first British Television Play, "The Man with the Flower in his Mouth", was transmitted in July [[1930]]. [[CBS]]'s [[New York City]] station began broadcasting the first regular seven days a week television schedule in the U. S. on [[July 21]], [[1931]]. The first broadcast included Mayor [[James J. Walker]], [[Kate Smith]], and [[George Gershwin]]. The first all-electronic television service was started in Los Angeles, CA by Don Lee Broadcasting. Their start date was [[December 23]], [[1931]] on W6XAO—later KTSL. Originally, mechanical equipment was used, but in June of 1936 a 300-line all-electronic service was started.
In [[Germany]], regular service started on [[March 22]], [[1935]], and one year later, the [[Berlin]] [[Summer Olympic Games]] were televised to places in Berlin and [[Hamburg]].
In [[1932]] the [[BBC]] launched a service using Baird's 30-line system and these transmissions continued until [[11 September]] [[1935]]. On [[November 2]], [[1936]] the [[BBC]] began broadcasting a dual-system service, alternating on a weekly basis between Marconi-EMI's high-resolution (405 lines per picture) service and Baird's improved 240-line standard from [[Alexandra Palace]] in [[London]]. Six months later, the corporation decided that Marconi-EMI's electronic picture gave the superior picture, and adopted that as their standard. This service is described as "the world's first regular high-definition public television service", since a regular television service had been broadcast earlier on a 180-line standard in Germany. The outbreak of the [[Second World War]] caused the service to be suspended. TV transmissions only resumed from Alexandra Palace in [[1946]].
[[ImageKuva:Braun HF 1.jpg|thumb|210px|Braun HF 1, [[Germany]], [[1958]] ]]
The first regular television transmissions in [[Canada]] began in [[1952]] when the [[Canadian Broadcasting Corporation| (CBC]]) put two stations on the air, one in [[Montreal, Quebec]] on [[September 6]], and another in [[Toronto, Ontario]] [[September 8|two days later]].
[[ImageKuva:Early portable tv.jpg|thumb|210px|left|Early portable television set]]
The first live transcontinental television broadcast took place in [[San Francisco, California]] from the [[Japanese Peace Treaty Conference]] on [[September 4]], [[1951]]. In [[1958]], the CBC completed the longest television network in the world, from [[Sydney, Nova Scotia]] to [[Victoria, British Columbia]]. Reportedly, the first continuous live broadcast of a breaking news story in the world was conducted by the CBC during the [[Springhill Mining Disaster]] which began on [[October 23]] of that year.
Programming is broadcast on [[television station]]sstations (sometimes called channels). At first, terrestrial broadcasting was the only way television could be distributed. Because bandwidth was limited, government regulation was normal. In the U.S., the [[Federal Communications Commission]] allowed stations to broadcast advertisements, but insisted on public service programming commitments as a requirement for a license. By contrast, the [[United Kingdom]] chose a different route, imposing a [[television licence]] fee on owners of television reception equipment, to fund the [[BBC]], which had public service as part of its [[Royal Charter]]. Development of cable and satellite means of distribution in the [[1970s]] pushed businessmen to target channels towards a certain audience, and enabled the rise of subscription-based television channels, such as [[Home Box Office| (HBO]]) and [[British Sky Broadcasting|Sky]]. Practically every country in the world now has developed at least one television channel. Television has grown up all over the world, enabling every country to share aspects of their culture and society with others.
By the late [[1980s]], 98% of all homes in the U.S. had at least one TV set. On average, Americans watch four hours of television per day. An estimated two-thirds of Americans got most of their news about the world from TV, and nearly half got all of their news from TV. These figures are now estimated to be significantly higher.-->
===Tietokoneet===
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