Representatives from Diebold, which sells both systems, told the council that Boston was better off with the optical scanners. John Silvestro, president of the company, said the optical scanning system reduces lines at polling places and helps preserve the integrity of elections by leaving a paper "audit trail." He also said the touch-screen system would cost the city about six times as much money, and
that companies like his are still working the kinks out of the touch-screen machines, a newer technology.
http://www.boston.com/dailyglobe2/214/metro/Menino_OK_s_new_voting_machines+.shtml