Yeah, I know. I was translating the documentation once that has pressure measured in psi (pounds per square inch). As a special note, my client asked to convert all units to the metric system. I still have nightmares about that.

And BTU - British Thermal units, and foot pounds-force, ft lb-force/minute, etc...

It was hell. Absolute hell

Here's a great link
http://www.ex.ac.uk/cimt/dictunit/dictunit.htm