You have GOT to check out the mechanical caclulator simulators this guy has developed: http://oldcalc.republika.pl Very, very cool! I believe the site is Polish, but there is an English link (the Union Jack in the upper left frame). -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *