Dear Categorically Inclined, On the lighter side, you might find a little amusement from this short animated video <http://www.youtube.com/watch?v=rYANU61J5eY> i did about monads. Best wishes, --greg -- L.G. Meredith Managing Partner Biosimilarity LLC 7329 39th Ave SW Seattle, WA 98136 +1 206.650.3740 http://biosimilarity.blogspot.com [For admin and other information see: http://www.mta.ca/~cat-dist/ ]