In the meantime, a new system of weights and measures, developed by French scientists following the Revolution of 1789, gained increasing international use. This metric system had as its fundamental ...
A nanometer (nm) is a unit of length in the metric system, defined as one billionth (10-9 ... promoting precise and clear communication in science and engineering.
In other words, the French introduced not only national standards, but a system of standards. It survives today as the metric system.
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