Thanks for your answer! DrP --- Peter Hansen <peter at engcorp.com> wrote in message news:<4033F338.ED0DAC5A at engcorp.com>... > Peter Hansen wrote: > > > > Other options? Or pointers to the right keywords to let someone > > investigate the state of the art/literature more closely? > > Dang time machine: http://www.captcha.net/ . Thanks Paul. :-) > > -Peter