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The International System of Units is abbreviated SI from the French 'Le Systeme International d'Unites' and is the modern form of the Metric System. The French term is used There are 7 base units in the SI system which can be combined to create any other unit. As of 2009, only 3 countries have not adopted the SI system as their offical system of measurement, Liberia, Myanmar and the United States.

SI Base Units

SI Derived Units
SI Supplementary Units
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