This is the sort of thing that you know but you forget, and I'm sure it occasionally bites people in the butt. The U.S. doesn't just use out-dated and counter-

This is the sort of thing that you know but you forget, and I'm sure it occasionally bites people in the butt. The U.S. doesn't just use out-dated and counter-intuitive units of measurement, it overloads their names with other, slightly different obsolete units of measurement!