Systems of Measurement Standardized systems agreed upon by some authority usually a governmental body SI --Systeme international agreed to in 1960 by an international committee main system used in this text also called mks for the first letters in the units of the fundamental quantitiesSystems of Measurement ◼ Standardized systems ◼ agreed upon by some authority, usually a governmental body ◼ SI -- Systéme International ◼ agreed to in 1960 by an international committee ◼ main system used in this text ◼ also called mks for the first letters in the units of the fundamental quantities