NOTE: Virtually all of the failures described in these files occurred on equipment that was "federally certified," that is, certified by NASED (National Association of State Election Directors).

	ES&S	Election Systems and Software	179 DRE failures in 27 pages (pdf) Vote-Switching Software Provided by Vendors: Map handout (181 Kb) and Details (125 KB) Details sorted by state (168 Kb) Learn how to use the DREs. See VerifiedVoting's descriptions of the equipment, and watch the demos.
	Diebold	Diebold Election Systems
	Sequoia	Sequoia Voting Systems
	MicroVote	MicroVote General Corporation
	AVS (WINvote)	Advance Voting Solutions
	Hart Intercivic	Hart Intercivic
	Unilect*	Unilect Corporation
	Danaher	Danaher Corporation
	VTI	Voting Technologies International
OR, browse through dozens of mess-ups: many states, many vendors.
* Thanks to Joyce McCloy of NC Verified Voting for her superb and persistent research, which led to this document. Thanks to Bill Buccolo for his valuable contributions to several of the vendor files.