Finishing:
Chemical Coaters Association (Twin Cities Chapter)
Powder Coating Magazine
National Metal Finishing Resource Center
Powder Coating Institute

Equipment:
Trumpf
Salvagnini
Haeger
Virtek
Iontec
Cincinnati
daewoo

Conversion Charts:
Common Conversions
Sheet Metal Gauge Conversion Chart
Millimeters/Fractions/Inches Conversion Chart

General:
National Institute of Standards and Technology
International Standards Organization (ISO)
James J. Hill Library
ASTM
Perry Johnson Registers, Inc.
NEMA
UL
CSA