Central count optical scan
Optical scan system that utilizes one or more high-speed scanners at a central location to tabulate ballots. Central count systems are usually paired with Vote By Mail technologies. Central count systems lack overvote/undervote protection capabilities.
Source: Glossary - Introduction to Information Technology for Election Officials, U.S. Election Assistance Commission, https://www.eac.gov/assets/1/28/Glossary_IT-Terms_Managing_Election_Technology.pdf; The State and Local Election Cybersecurity Playbook, Defending Digital Democracy Project, Harvard Kennedy School Belfer Center for Science and International Affairs, https://www.belfercenter.org/sites/default/files/files/publication/StateLocalPlaybook%201.1.pdf