The book, Category Theory for Computing Science, is now available for free download. Point your browser to ftp://ftp.math.mcgill.ca/barr/pdffiles/Index.html and choose it. Or point your browser to ftp://ftp.math.mcgill.ca/barr/pdffiles/ctcs.pdf to get it in one step. I have also asked TAC to consider it as a TAC reprint. Michael -- The modern conservative is engaged in one of man's oldest exercises in moral philosophy--the search for a superior moral justification for selfishness. --J.K. Galbraith [For admin and other information see: http://www.mta.ca/~cat-dist/ ]