I am implementing a model defined with quantity data having {value, multiplier, unit} where multiplier is m, c, k, M, etc unit is V, A, Hz, W, etc So I am looking for what quantities/units packages are around before trying to write my own. I have downloaded [1] and had a poke around there with the tests. Are there any further examples around of how to use it and to define new units? I notice that Voltage=Joules/Columb is not defined. Is anyone have any familiar with ports of packages mentioned here [2] [3] [4] from other platforms? cheers, Ben [1] http://www.squeaksource.com/Units.html [2] http://www.cincomsmalltalk.com/publicRepository/Quantities.html [3] http://www.smalltalking.net/goodies/Dolphin/ (scroll to bottom) [4] http://comments.gmane.org/gmane.comp.lang.smalltalk.squeak.general/55894