> Of David King >I have, many years ago, used CNC machine tools and always >worked in microns

Ahem.

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http://ts.nist.gov/ts/htdocs/200/202/metrsty3.htm

Incorrect Terms
The word "micron" is an obsolete term for the quantity "micrometer."
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Brain thought on reading the Ahem.

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Future Incorrect Terms
The word "inch" is an obsolete term for the quantity "25.4 mm"
The word barley corn is an obsolete term for the quantity "8.3666 mm"
The acronym USMA is an obsolete term for a group of people "who laboured to bring light to the world, and whose remains are buried in a Sacred Vault in the far mountains."


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