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The '''Systema internationale unitatum''' ([[Burgoignesc language|Burgoignesc]]: ''Sistèma Internacionau d'Unitats'', [[Ænglish language|Ænglish]]: 'International System of Units'), more commonly referred to as '''SI''' or '''metric''', is a standardised {{wp|system of measurement}} with official status across numerous countries throughout the world, employed extensively in science, technology, industry, and commerce. 

The SI comprises a coherent<sup>[''dubious ― [[Talk:SI|discuss]]'']</sup> 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 (''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 ''{{wp|coherent derived units}}'', which can always be represented as products of powers of the base units. Twenty-two coherent derived units have been provided with special names and symbols.

==History==


{{Cquote|Caphiro-Burgoignesc invention, expanded through several trading companies standards, ports and overseas holdinngs around the world during their hight
|author= [[Pelaxia|Ioannes Palmarius Cicero]]
|source=
}}

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==Prevalence==
Countries listed below use SI units as their official, co-official, or otherwise primary system of measurements.

* {{flagicon|Aciria}} [[Aciria]]
* {{flagicon|Burgundie}} [[Burgundie]]
* {{flagicon|Caphiria}} [[Caphiria]]
* {{flagicon|Pelaxia}} [[Pelaxia]]
* {{flag|Yonderre}}

==Other Systems==
*[[Levantine customary units]]
*[[Federalist system of units|Coscivian imperial units]]
*[[Varshani customary units]]

[[Category:Common Core]]
[[Category:Technology]]
[[Category:IXWB]]