http://www.cs.uiowa.edu/~jones/voting/colloq/
Jones Talk, Slide 7

Aside - Two Ballot Counting Methods

• Central Count
  1. Seal ballot box at close of polls.
  2. Secure transport to counting center.
  3. Count all precincts at counting center.
  4. Sum across precincts to compute final canvass.
  
  -- Need just one counting machine at center.
  -- Can afford a big expensive machine.
  -- Can afford exhaustive calibration and testing.

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