Skunks, Could you imagine a search engine where you can enter musical notes and you ask it to play for you the sound or some financial calculation on net present value of money, and it gives you the computation? This is unbelievable check out http://www.wolframalpha.com/ Whereas google and bing (sic) are excellent in the search and indexing of information wolframalpha does an amazing job in "Computational Knowledge Engine" check it out. Kiania PS. Before you ask, they've put me on retainer ;-) -- [Asentric Consulting Ltd] If a man has in himself the soul of a slave will he not become one no matter what his birth .... -Richest Man in Babylon