In SI units, “SI” stands for:

Correct answer: International System of Units. SI stands for Système International d’Unités, the International System of Units.

Background: SI stands for Système International d’Unités. It was adopted in 1960 and is the metric system used worldwide in science.

• System Instrument: “System Instrument” is not correct.
• System Enterprise: “System Enterprise” is not correct.
• Internal System: “Internal System” is not correct.

Did you know? It has seven base units: metre, kilogram, second, ampere, kelvin, mole, and candela. In 2019 the units were redefined using fundamental constants of nature.

Memory trick: Seven base units: M-K-S-A-K-M-C (“My Kind Sister Always Keeps Making Candy”).