== Metric systems other than the modern (SI) ==
=== The original French system ===
The original French system somewhat continued the tradition of having separate base units for geometrically related dimensions, i.e. [[metre]] for lengths, [[are]]
The base unit of mass is the [[kilogram]]. This is the only base unit that has a prefix, for historical reasons. Originally the kilogram was called the "grave", and the "gramme" was an alternative name for a thousandth of a grave. After the French Revolution, the word "grave" carried negative connotations, as a synonym for the title "count". The grave was renamed the kilogram [http://www.aticourses.com/international_system_units.htm]. This also serves as the prototype in the [[SI]]. It included only few [[SI prefix|prefixes]] from [[milli]], one thousandth to ''myria'' ten thousand.