The United States of America.

Ounces and pounds, feet and inches, miles and yards, the list goes on and on.

Us poor Europeans get little practice in non-decimal arithmetic any more - although at the age of 10 I was delighted that the mathematics curriculum was no longer to be wall-to-wall arithmetic in non-decimal measures ...

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"No matter how fast or how far you run, you're still in the space where you are." -- Russell