This document contains unified definitions and explanations of terminology used in the standards@ TR20.20 Handbook@ and other documents of the ESD Association. The Glossary compares EOS/ESD industry terminology with the more familiar usages of electrical and electronic terms. Although the Glossary is not intended to be an encyclopedia@ it includes historical information (including explanations of obsolete terminology) and clarifies terminology in other EOS/ESDrelated documents. The Glossary is revised as needed so that it evolves continually along with the evolving knowledge of EOS/ESD phenomena and protective methods. New revisions of the Glossary cover all issued standards@ standard practices@ standard test methods in effect at the time the revision@ but not necessarily draft documents. At the time of each edition's publication@ the Glossary includes the most recent updates of the definitions from all issued ESD Association standards. PURPOSE The purpose of this Glossary is to promote technically correct terminology in the electrical overstress/electrostatic discharge (EOS/ESD) community.