Editing System of units of measurement (section)

{{Short description|Collection of units of measurement and rules relating them to each other}}
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A '''system of units of measurement''', also known as a '''system of units''' or '''system of measurement''', is a collection of [[units of measurement]] and rules relating them to each other. Systems of measurement have historically been important, regulated and defined for the purposes of science and [[wikt:commerce|commerce]]. Instances in use include the [[International System of Units]] or {{Abbr|SI|Système international}} (the modern form of the [[metric system]]), the [[British imperial system]], and the [[United States customary system]].