I've Given up. BUT, the metric system in the US has ben usurped by base 10 US units. As a civil engineer the measuring tape was in feet and "tenths of feet".

I've Given up. BUT, the metric system in the US has ben usurped by base 10 US units. As a civil engineer the measuring tape was in feet and "tenths of feet". A "mil" is a thousandth of an inch. I worked for the US government civil engineers in the 1990's. They were going to issue contracts in metric years ago. I don't think they ever did.