http://www.cs.uiowa.edu/~jones/voting/colloq/
Jones Talk, Slide 9
- Direct Recording Electronic Voting Machines
 
-- First use, 1978.
-- Slow growth through 1980's.
- Essentially a microcomputer implementation of a lever machine.
 - Modern versions are based on repackaged PC technology.
 
-- Weakness: It's all software!
-- Weakness: Hard to prove that the correct software is resident.
-- Weakness: Proprietary data formats everywhere!
-- Weakness: No meaningful possibility of a recount.
-- Weakness: Expensive machines, $5000 per booth!
-- Weakness: Testing is extremely difficult and reveals little!
-- Strength: Machine count is fast and can be very accurate.
-- Strength: Increased use of commodity hardware reduces prices.