Hello Fellow Derivers I strongly suggest that you go to the site http://www.ti.com/calc/docs/news/cg-504.htm for some rather Earth shattering news. Cheers Terence Terence Etchells B.Sc., M.Sc., C.Math, MIMA School of Computing and Mathematical Sciences Liverpool John Moores University Liverpool L3 3AF UK http://www.cms.livjm.ac.uk/etchells Tel: 0151 231 2172 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%