Imperial and metric
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The three systems of measurement are the metric system, the imperial system (also known as the British system), and the United States customary system. Each system has its own units for measuring length, weight, volume, and other quantities.
foot-pound-second system (fps)
centimeter-gram-second system (cgs)
meter-kilogram-second system (mks)
There are only three countries that have not officially adopted the metric system as their system of measurement: the United States, Liberia, and Myanmar.
length width height
Meters, liters, kilograms.
Yes only three countries still use other systems, Burma, Liberia, and USA.
The measurement of distance in the International System of Units (SI) is the meter (m).