A touchscreen electronic poll book in Montgomery County, Md., being used for training in 2006. The technology has sped up voting lines but also raises potential security issues. The Durham, N.C., electronic poll books that failed were laptop-based.

A touchscreen electronic poll book in Montgomery County, Md., being used for training in 2006. The technology has sped up voting lines but also raises potential security issues. The Durham, N.C., electronic poll books that failed were laptop-based.