The metric system

There's simply no comparison. It's time to scrap the English system. Put it in the scrap heap.
The English or the American? Fluid Oz are different in the US compared to the former British empire.
 
One of president Jimmie Carter's many failures. I always thought the U.S. Military's use of the metric system began when NATO was organized. Apparently it goes back at least to WW2. I have a U.S. made (inert) anti-tank shell marked "37mm MK3A2" Lot 8099-7 FA 1941.
what's the problem?
 
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