Instruments
- 1841
- The Associated Pipe Organ Builders of America (APOBA)
- A professional association of North American firms engaged in building traditional pipe organs. Members, officers, publications, outreach, photos and links.
- 1842
- The Peragallo Pipe Organ Company
- In Paterson, N.J.; history, representative instruments, contact information.
- 1843
- Tickell, Kenneth & Co
- UK firm; company history and philosophy; extensive information on two organs.
- 1844
- Vleugels Orgelmanufactur
- Builder and restorer in Hardheim, Germany. Company profile, photographs and descriptions of some instruments.
- 1845
- Wallace, David E. and Company
- Restorer of 19th century tracker organs. Company profile, description of recent projects. Gorham, Maine.
- 1846
- Wicks Organ Company Web Site
- The Wicks Organ Company of Highland, Illinois, custom pipe organ builders since 1906.
- 1848
- Wissinger Organs
- Builder of tracker instruments. News, opus list with photographs and specifications. Portsmouth, New Hampshire.
- 1849
- Zimmer, Cornell
- Builder of pipe/electronic combination organs in Denver, North Carolina. Opus list with photographs, contact information.
- 1851
- Pipe Organs of Temple Square
- Detailed information on the nine pipe organs at the headquarters of the Church of Jesus Christ of Latter-day Saints in Salt Lake City, Utah, USA.
- 1852
- Pipe Organs of the Merrimack Valley
- These Massachusetts organs were featured at the American Guild of Organists Regions I and II Convention, 1995.
- 1853
- The Organ Historical Trust of Australia
- Pipe organs in Australia, their conservation and documentation.
- 1854
- The Pipe Organs of Southern West Virginia
- Photos and specifications of pipe organs in Athens and Beckley, W.V.
- 1855
- Huddersfield Organists' Association
- Articles and other items of interest to those concerned with organs and organ music. Also a pipe organ archive especially local to West Yorkshire.
- 1856
- Redundant Organ Rehousing Company Ltd.
- Relocates used pipe organs in the UK List of organs and pipes for sale.
- 1857
- The Institute of British Organ Building
- Professional association of British organ builders. Directory of members, description of services and publications for sale.