1. Physical apparatus and any supporting supplies, materials, and logic that together form a functional unit that performs assigned tasks as an integrated whole.
Source: Election Terminology Glossary - Draft, National Institute of Standards and Technology (NIST), https://pages.nist.gov/ElectionGlossary/
2. Functional unit that performs its assigned tasks as an integrated whole.
Source: Glossary of terms database, U.S. Election Assistance Commission, https://www.eac.gov/glossary/
3. Any means by which a voter may cast a ballot for Internet voting (e.g., computer, tablet, smartphone).
Source: Independent Panel on Internet Voting, British Columbia, https://elections.bc.ca/docs/recommendations-report.pdf