Porcelain Enamel Institute
Portable Rechargeable Battery Association (PRBA)
Powder Coating Institute (PCI)
Pressure Vessel Research Council
Powder Metallurgy Equipment Association (PMEA)
Powder Metallurgy Parts Association
Precision Machined Products Association (PMPA)
Precision Metalforming Association (PMA)
Rack Manufacturer Institute (RMI)
Refractory Metals Association (RMA)
Resistance Welders Manufactures Association (RWMA)
Sheet Metal & Air Cond. Contractors' National Assoc.
Sheet Metal Workers International Association (SMWIA)
Silver Institute
Soc. for the Advancement of Material & Process Eng. (SAMPE)
Society for Mining, Metallurgy, and Exploration (SME)
Society for Protective Coatings (SSPC)
Society of American Silversmiths (SAS)
Society of Automotive Engineers (SAE)
Society of Gilders
Society of Manufacturing Engineers (SME)
Society of North American Goldsmiths (SNAG)
Society of Vacuum Coaters (SVC)
Specialty Steel Industry of North America (SSINA)
Specialty Tubing Group (STG)
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