OK, folksonomy does work. It is very cool and extremely addictive. Third stumble lead me to this: http://www.micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/ Cheers, Teemu Helsinki, Finland __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html