(Electronic-Voting) Using a computer-based machine to display an election ballot and record the vote. E-voting machines typically use touch screens as the data entry method for a voter's selection. These devices are very controversial because they typically do not provide a paper trail to be used for auditing. Without an audit trail, there is no simple way of detecting a programming error or hack. Replacing mechanical machines and punch cards, approximately 30% of the voters in the U.S. 2004 presidential election used e-voting (about 40 million people).