Optical scan voting system

An optical scan voting system is an electronic voting system and uses an optical scanner to read marked paper ballots and tally the results.

Election technology
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Technology
Absentee ballot Chad DRE voting machine Electronic voting Electronic voting machine Optical scan voting system Provisional ballot Voting machine Voter-verified paper audit trail Vote counting system
Terminology
Central count or CCOS Overvote Precinct count or PCOS Undervote Residual vote or drop-off
Testing
Acceptance testing Qualification testing Software verification Usability testing
Manufacturers
Election Systems & Software Hart InterCivic Dominion Voting Smartmatic
Related aspects
Certification of voting machines Independent Testing Authority (ITA) NVLAP VVSG End-to-end auditable voting systems Help America Vote Act Independent verification systems Secure Electronic Registration and Voting Experiment Software independence

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