Voter Registration System (VRS)
A distributed or centralized system that permits the collection, storage, editing, deletion and reporting of voter records. HAVA requires each state to have a centralized, statewide voter registration system (VRS). VRS have multiple interfaces and can interact with Department of Motor Vehicle (DMV) systems, election officials, voters and other stakeholders. The VRS may be vendor-provided or “homegrown”. They may be client-server architecture or mainframe based.
Source: Information Technology Terminology, U.S. Election Assistance Commission, https://www.eac.gov/documents/2017/09/21/information-technology-terminology-security