Question

what is SI unit system and when was it established?

Answer 1

Answer:

The International System of Units, or SI, is a decimal and metric system of units established in 1960 and periodically updated since then.

Explanation:

1960

The International System of Units, universally abbreviated SI (from the French Le Système International d'Unités), is the modern metric system of measurement. The SI was established in 1960 by the 11th General Conference on Weights and Measures (CGPM, Conférence Générale des Poids et Mesures).