Stan Heckman said: 
> 
....
> 
> What's the problem with functions other than +, -, *, and /? The problem
> is that there are so many of them. :-) In the Mathematica package, I
> kept encountering functions that should work with dimensional quantities
> but didn't. See the functions section on the web page. If someone can
> figure out any way to avoid the same proliferation of tiny methods in
> the Squeak units package, that would be a very important contribution.

Well, obviously, all you need are before:, after:, and around: methods --
units should be a mixin...  but that's CLOS.

joe