The Lowrey organ was an electronic organ named after its developer, Frederick C. Lowrey (1871–1955), a Chicago-based industrialist and entrepreneur. Lowrey's first commercially successful full-sized electronic organ, the Model S Spinet or Berkshire, came to market in 1955, the year of his death. Lowrey had earlier developed an attachment for a piano, adding electronic organ stops on 60 notes while keeping the piano functionality, called the Organo, first marketed in 1949 as a very successful competitor to the Hammond Solovox.

An electric organ, also known as electronic organ, is an electronic keyboard instrument which was derived from the harmonium, pipe organ and theatre organ. Originally designed to imitate their sound, or orchestral sounds, it has since developed into several types of instruments:Hammond-style organs used in pop, rock and jazz; digital church organs, which imitate pipe organs and are used primarily in churches; other types including combo organs, home organs, and software organs.