Your right BillHS, the metric system makes sense. But, most Americans are too lazy, stubborn, concieted, uninformed, moronic to switch. I live in Michigan, USA. Born/raised. I am a CNC machinist/programmer for a tooling supplier for GM/Ford/Dodge. We make molds/coreboxes for cast parts (mostly aluminum heads & engine blocks). I am dealing with metric and standard (inches) dimensions all day long. I'm not sure "standard" is/should be the right term. Worldwide, Metric System is the standard. The design/programming (CAD/CAM) end of our business uses Metric almost exclusively. The machine department tries to stick to inches. We have some older machines that cannot read/operate with metric dimensions. Two machines we have are so old, the Henry Ford Greenfield Museum has an identical model on display as their oldest NC machine example. The stock (bar stock, plates, billets, etc.) we buy is in inches. Same with the cutting tools (drills, end mills, etc.). Measuring tools (calipers, micrometers, indicators, etc.) are available either way, but, Metric models are subject to limited options/availabilty and higher prices. The drawings we get always have metric numbers on them. Sometimes they will have both Metric/standard, and occasionally, just standard. Every machinist in the shop has 25.4 (or its inverse: .03937...) in their memory button on their calculator to convert back and forth. All newer machines are just as happy using either system, and I would prefer to write my programs in metric. But, the foreman, who is older than dirt, says everybody is used to inches and wants me to use inches in case someone needs to troubleshoot my program (not likely). This situation is nonsensical/inefficient but not likely to change much very soon. I personally own at least a few thousand dollars worth of measuring tools that read in inches.
"Metric is better, but..."
P.S. Hey, Mrs. Melkvik (my 6th grade math teacher), you said we would be switched to Metric by 1985!