Regulatory Agencies:
NTEP Database
NCWM (National Conference on Weights and Measures)
ISWM (International Society of Weighing and Measurement)
NIST (National Institute of Standards and Technology)
NIST - Metric Conversion Factors for Use in Trade and Commerce
NIST - Metric Conversion Programs/Tools
NSF International
UL (Underwriters Laboratories)
FDA CDRH