##### International System of Units (SI) The International System of Units, known by the international abbreviation SI in all languages is the modern form of the [[metric system]] and the world's most widely used system of [[Measurement]] . Established and maintained by the General Conference on Weights and Measures t is the only system of measurement with an official status in nearly every country in the world, employed in science, technology, industry, and everyday commerce. The SI comprises a coherent system of units of measurement starting with seven base units, which are the [[second]] (symbol s, the unit of time), [[metre]] (m, length), [[kilogram]] (kg, mass), [[ampere]] (A, electric current), [[kelvin]] (K, thermodynamic temperature), mole "Mole (unit)") (mol, amount of substance), and candela (cd, luminous intensity). The system can accommodate coherent units for an unlimited number of additional quantities. These are called coherent derived units, which can always be represented as products of powers of the base units. >Covered in: >Mentioned in: >References: [[WP SI|🌍]] >Required by: > >Related to: