
An electronic organ is an electronic keyboard instrument which was derived from the harmonium, pipe organ and theatre organ. Originally, it was designed to imitate the sound of pipe organs, theatre organs, band sounds, or orchestral sounds. Today, it has developed into three or more types of instruments: ===Electrostatic reed organs (1934–1964)=...
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http://en.wikipedia.org/wiki/Electronic_organ

keyboard musical instrument in which tone is generated by electronic circuits and radiated by loudspeaker. This instrument, which emerged in the ... [5 related articles]
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http://www.britannica.com/eb/a-z/e/20
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