Metric system e.g. kilogram, metre
Imperial system e.g. foot, pound, gallon
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They are the U.S. measurements. Instead of the Metric system that uses meters, the Customary system uses feet and inches.
Both systems have measurements for distance, area, volume, and mass or weight.
The English system and the metric system.
United States customary units are a system of measurements commonly used in the United States.
metric system