As a computer scientist, I appreciate that increased layers of hidden complexity only increase vulnerability to both innocent error and fraudulent manipulation. As a voter, I thoroughly understand how to indelibly mark a paper ballot. The ballot can be machine read and tabulated even before I leave the precinct. It is as nearly perfect a vote-recording technology as I can imagine.
Silk Hope, N.C.
Gold Hill, Ore. Although Oregon voters mail in their ballots, all counties in the state tally votes with optical scanners. The article’s graphic shows, by means of colors, which were the last Oregon counties to switch from punch-card readers to scanners for ballot counting.—P. Weiss