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America has counted ballots by hand, by lever machine (from 1892), by punch card, and now overwhelmingly by optical scanners reading paper ballots, with a small and shrinking share on paperless machines. The 2000 Florida recount forced a rebuild of the whole system; the years since 2020 turned tabulation itself into a political battleground. This explains the full path a ballot takes from the voter's hand to the certified total — scanning, adjudication, canvassing, audits, recounts — and why election-night numbers shift in predictable ways that get mistaken for something sinister.
Almost every argument about American vote counting is an argument about one of these eight steps, usually without naming it. The path below is the common case — an in-person vote on a hand-marked paper ballot, which is how about 70% of registered voters cast a ballot. A mail ballot skips steps 1 and 2 and adds a signature check at the front; a provisional ballot is pulled out after step 1 and rejoins at step 6, if at all.
What is worth noticing is where the humans are. A scanner reads ovals. It does not decide who wins, it does not decide whether a ballot is valid, and it does not certify anything. Those decisions belong to named people working in pairs from opposing parties, under rules written before the election, with the paper still in the room.