The top four providers of voting machine equipment are Election Systems & Software (ES&S), Premier Election Solutions (formerly Diebold), Sequoia Voting Systems and Hart InterCivic
WhatIs.com (A knowledge exploration and self-education tool about information technology IT), Margaret Rouse (Editorial Director), Electronics Glossary, TechTarget, Inc., USA 2015. http://whatis.techtarget.com/glossary/Electronics/ page/2, (Electr - Amer) {992}