American Theatre Organ Society
Musical Instrument Technicians Association
MITA is a worldwide association of professional technicians organized to improve the electronic music service industry.
The Harpsichord Clearing House - contains the most comprehensive inventory of early keyboard instruments for sale in North America. HCH has been building and brokering since 1969, and, today, represents instruments from virtually every builder. Also carries books about harpsichords.
Jäger und Brommer (Kirchenorgel)
Keyboard Exchange International
Hammond Organs
Lautenwerke and Harpsichords by Steven Sørli
Organ Historical Society
Robert Morley and Co., Ltd.
Pianoforte and Harpsichord Makers
Rodgers Instruments
Theaterseatstore.com/theater-organ The Theater Organ: Then and Now
Charles Wolff
Clavichord Maker, Kits and parts