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standard time has in connection with the atomic
clock of the Time Service Dept., U.S. Naval
Observatory, Washington, DC.
these tables there are a collection the definitions
and the descriptions of the measure of the International
System of units. Are inserted the equivalences
between the units of measure of the metric system
and the units of the Anglo-Saxon system. For facilitate
the conversion between different quantities, is
listed most part of the factors of conversion.
In addition to the units of the International
System are present unit of measure practices and
measurements of common use. continuation....
and software for calculation and conversion
factors list PDF
vs US Dollar