Everything about units and constants       updated:  11/25/2006

A Dictionary of Units (most recommended)

International system of units (SI) ,

SI base units  

Definitions of the SI base units

Historical context of the SI base units   Select a unit:    meter  kilogram  second  ampere  kelvin  mole  candela

Brief history of the SI  

TEMPERATURE SCALES    

   CONVERSION OF UNITS  

International aspects of the SI   The establishment and maintenance of the SI and Metric systems

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A Dictionary of Units of Measurement Site Map

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