http://netvouz.com/url/ba3df8895f34d0ddecd7728b1be0320b?feed=rss Info about a link http://acarol.woz.org/ The second generation machine, documented here, calculates to the same precision, but is capable of being expanded to 3rd order differences and 4 digits accuracy. Other than the paper printed digit labels used to output the answer, standard LEGO pieces are used without modification. fjordaan Tue, 28 Apr 2009 14:04:10 GMT