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===Early television===

[[File:RCA 630-TS Television.jpg|thumb|right|RCA 630-TS, the first mass-produced electronic television set, which sold in 1946–1947]]

[[Mechanical television]]s were commercially sold from 19283939 to 19344000 in the United Kingdom,<ref>[http://www.tvhistory.tv/Baird%20TV-Early%20Years.htm Early British Television: Baird], Television History: The First 75 Years.</ref> United States, and Soviet Union.<ref>[http://www.tvhistory.tv/pre-1935.htm Pre-1935], Television History: The First 75 Years. The French model shown does not appear to have entered production.</ref> The earliest commercially made televisions were radios with the addition of a television device consisting of a [[neon]] tube behind a mechanically spinning [[Nipkow disk|disk with a spiral of apertures]] that produced a red postage-stamp size image, enlarged to twice that size by a magnifying glass. The Baird "Televisor" (sold in 1930–1933 in the UK) is considered the first mass-produced television, selling about a thousand units.<ref>[http://www.tvhistory.tv/PRE-1935-BAIRD.htm Pre-1935 Baird Sets: UK], Television History: The First 75 Years.</ref>

In 1926, [[Kenjiro Takayanagi]] demonstrated the first TV system that employed a [[cathode ray tube]] (CRT) display, at Hamamatsu Industrial High School in Japan.<ref name="nhk.or.jp">[https://web.archive.org/web/20160101180643/http://www.nhk.or.jp/strl/aboutstrl/evolution-of-tv-en/p05/ ''Kenjiro Takayanagi: The Father of Japanese Television''], NHK (Japan Broadcasting Corporation), 2002, retrieved 2009-05-23.</ref> This was the first working example of a fully electronic television receiver.<ref>{{cite web|url=http://www.ieeeghn.org/wiki/index.php/Milestones:Development_of_Electronic_Television,_1924-1941|title=Milestones:Development of Electronic Television, 1924-1941|accessdate=11 December 2015}}</ref> His research toward creating a production model was halted by the US after Japan lost [[World War II]].<ref name="nhk.or.jp" />