>One thing I learned from engineering - nothing is ever implied!

Yeah... when it's implied, it must be physics :). But in case of Hertz, it's the definition of it.

>I also use terms like, "Miles per gallon".

Which gave me the reason to use Excel... one of those things I can't possibly calculate in my head. Because miles-per-gallon is very counter-intuitive for me. Liters per hundred kilometers, now that's something I understand, simply because of years of use. So I'm tracking my car's consumption in both units, just to get used to these weird Anglo-Saxon ways of measurement.

One of the few things I was happy I didn't have to convert from metric was the phases of the moon. Pretty much everything else comes in those weird, illogical units of measure :)