www.aamanet.org
The American Architectural Manufacturers Association is the source of performance standards, product certification and educational programs for the fenestration industry

www.ppgglass.com
A leading global manufacturer of quality architectural, residential, and commercial glass products

www.windowanddoor.net
The information source for the fenestration industry

www.fenestrationmagazine.com
The magazine for the window and door industry

www.glass.org
The National Glass Association. The largest trade association representing the flat (architectural and automotive) glass industry

www.sgcc.org
The Safety Glazing Certification Council: A non profit corporation, established in 1971 by manufacturers of safety glazing products, building code officials, and other concerned with public safety