Hello,
the USA is a technical mess:
Miles, Feet and 3/7 of an inch and i'm 5'9" tall [big grin]
Acre,
Pound
Ounze
Fahrenheit
Gallon = 231 inch³ [down]
Pint
PSI (Pound-force per square inch)
my goodness - what a stupid system!
110 Volt
i had to deal a lot with that idiotic stuff, when i was setting up grinders in the USA. I mean real grinders - you know that kind of machinery, that makes out of a piece of steel an advanced highly precise part.
It needed some days to catch up with that system. But once figuered out it was handable but always feeled odd and it looked really stupid if you look into a blueprint of a part to grind and see numbers like 3 5/11 inch wide [woah]
Btw: Anybody seems to think about the USA as a technical highly developed country, but take a look at the middle of the country, somewhere in Arizona or Montana or South Dakota or Ohio or Indiana outside of the bigger cities (and even in the cities)...
You will see a lousy technical infrastructure, at the technical state of the 20ies (at its best) of the last century.