Yes. Thanks for missing the point so that I may clarify. I was more specifically referring to using different units within the context of a single paper or article while referring to the same parameter. Yes, the orbiter crashed because Americans are too stubborn to accept progressive, logical standards that conflict with the saturation marketing of tools by companies (ahem..Craftsman) that are dying because of excessive inventory complexity. Oh, and that educational thingy that makes American parents feel dumber than their kids because the rest of the world finds new concepts and puts them in, of all silly things, textbooks.