Digital optical scan system

Optical scan system that converts voter choices on a paper ballot to digital values. Digital op scan systems can accommodate a broader range of paper types, sizes of paper, ballot layout, and voter marks than infrared (IR) op scan systems.

Source: Information Technology Terminology, U.S. Election Assistance Commission,; The State and Local Election Cybersecurity Playbook, Defending Digital Democracy Project, Harvard Kennedy School Belfer Center for Science and International Affairs,