What are these tasks that were traditionally performed in customary units in the U.S. — and continue to be done in them — but are more suited to SI units? An i

What are these tasks that were traditionally performed in customary units in the U.S. — and continue to be done in them — but are more suited to SI units? An important obstacle to my psychological well-being as an engineer is the failure of humanity to adopt UTC for use on their wall clocks, a failure that has little to do with America's metrical intransigence.