-- ounce
-- furlong
-- gallon
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Customary Units
A Customary Unit or non-SI unit is a measurement unit that is not part of the metric system. Customary units are mainly units of the Imperial system but they could be localised customary units - such as Gaj (for area) is South Asia.
SI units is what we use in the United States for the common unit of measurement for matter.
using classical rather than metric units of measurement
America uses the customary units f measurement.