The SI was developed in 1960 from the metre-kilogram-second (MKS) system, rather than the centimetre-gram-second (CGS) system, which, in turn, had many variants.
=== Mednarodni sistem enot ===Mednarodni sistem enot (s kratico SI iz francoskega imena "Système International d'Unités") je sodobna, prenovljena oblika metrskega sistema.