In a jurisdiction using an optical scan voting system, voters choose by filling an oval or by completing an arrow on the printed ballot next to their chosen candidate or referendum position. Optical scan technology has also been used by many standardized tests. Tabulating machines count the ballots either after the polls close or as the voters feed the ballots into the machine, in which case the results are not known until after the polls close. Officials often will manually count any ballots that cannot be read or with a write-in candidate and may recount the ballots in the event of a dispute.
In a jurisdiction using a punched card system, voters choose by removing or "punching out" a perforated chad from the ballot next each choice. The ballot may be pre-printed with candidates and referenda, or may be a generic ballot placed under a printed list of candidates and referenda. Tabulating machines count ballots after the polls close. Officials may manually count the ballots in the event of a dispute. Punched card voting systems are being replaced by other voting systems because of a high rate of inaccuracy related to the incomplete removal of the perforated chad and the inaccessibility to voters with disabilities.
In a jurisdiction using a mechanical voting system, often called a "voting machine", voters choose by pulling a lever next to their choice. There is a printed list of candidates, parties and referenda next to the levers indicating which lever is assigned to which choice. When the voter pulls a lever, it turns a connected gear in the