American Walnut Manufacturers Association (AWMA) is an international trade association representing manufacturers of walnut lumber, dimension lumber, veneer, walnut squares, and gunstock blanks.

Hardwood Manufacturers Association (HMA) gives a wealth of information about hardwood floors, including tips for designing, buying and maintaining hardwood floors.

Maple Flooring Manufacturers Association (MFMA) Founded in 1897. It has established itself as the authority of technical and general information on maple sports flooring.