Electone is the trademark used for electronic organ

Electronic organ

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....

s produced by Yamaha.
After Hammond

Hammond organ

The Hammond organ is an electric organ invented by Laurens Hammond in 1934 and manufactured by the Hammond Organ Company. While the Hammond organ was originally sold to churches as a lower-cost alternative to the wind-driven pipe organ, in the 1960s and 1970s it became a standard keyboard...

 pioneered the electronic organ

Electronic organ

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....

 in the 1930s, other manufacturers began to market their own versions of the instrument. By the end of the 1950s, familiar brand names of home organs in addition to Hammond included Conn, Kimball

Kimball International

Kimball International is a manufacturer of furniture and electronic assemblies, serving customers around the world. Kimball International consists of two groups: the Furniture Segment and the Contract Electronics Segment. It is the successor to W.W...

, Lowrey

Lowrey organ

The Lowrey organ is an electronic organ named after Chicago industrialist Frederick Lowrey.During the 1960s and 1970s, Lowrey was the largest manufacturer of electronic organs in the world. In 1989, the Lowrey Organ Company produced its 1,000,000th organ....

, and others, while companies such as Allen and Rodgers

Rodgers Instruments

Rodgers Instruments Corporation is an American manufacturer of classical and church organs. Rodgers was founded in 1958 by Rodgers W. Jenkins and Fred Tinker, employees of Tektronix, Inc., of Portland, Oregon, and members of a Tektronix team developing transistor-based oscillator circuits...

 manufactured large electronic organs designed for church and other public settings.

The Yamaha Electone series debuted in 1959 with the D-1, a home instrument.