- Manufacturers
- Retailers
- Parts, supplies, etc.
- Buildings, people, etc.
- Model train groups
- Arizona Big Train Operators
- Arizona Rails (Ponderosa North Model Railroad Club)
- Bay Area Garden Railway Society
- Florida Garden Railway Society
- Gadsden-Pacific Toy Train Museum
- Greater Cincinnati Garden Railway Society
- Greater Vancouver Garden Railway Club
- Ottowa Valley Garden Railway Society
- Shasta Garden Railway Society
- Washington, Virginia & Maryland GRS
- Miscellaneous
- Places of interest