[Maxima] using units in Maxima?

[Ronald Crummett]

Hi -

I have a project in a communication circuits class, in which our 
instructor wants us to use a program (he suggested Mathcad and Matlab 
but I want to try to do it in Maxima) to calculate several values for 
a transistor.  In his example, done in Mathcad, he includes units with 
his value assignments and calculations.  It it possible to do such a 
thing in Maxima?  If so, how?  Thanks.

-Ron Crummett