"Hmmm, your text is (maybe unintentional) a bit negative about those who do not immerse themselves totally in technical details." I think it is an entirely fair question and not negative, although the responses to it might reveal a bit of the 'PC' (politically correct) world we are now living in where it is not correct to point out that the 'king is wearing no clothes' (from Grimm's Fairy Tales?). How else would you get to the heart of the matter in asking the central nature of that question without a lot of fancy foot-work in order to remain PC? RF Jim -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu