William Stein wrote:

> Mathematica's design spells out the units instead of using the
> conventional abbreviations.  I think that makes a lot more sense for
> Sage as well, since it's much more explicit, and it is very easy to
> confuse say "N" (for Newton's) with say "N" for numerical_approx.

Agreed. That's a good argument for separating units from quantities
in an expression. Then you can tell without ambiguity which symbols
are supposed to be units.

best

Robert Dodier

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