On Jan 29, 2014 11:36 AM, "Paul Koning" <paulkoning at comcast.net> wrote: That one seems controversial, depending on which standards organization or reference you consider definitive. The slug is the Imperial unit of mass, but the US pound is ambiguous, and the avoirdupois pound is definitely a unit of mass. All the more reason to ditch the pound for kilograms and newtons. Atrocious!