'''NIST Enterprise Architecture Model''' ('''NIST EA Model''') is a late 1980s [[Enterprise Architecture framework|reference model]] for [[Enterprise Architecture]], which definedefines the content of an enterprise architecturesarchitecture<ref name "CIO 2001">Chief Information Officer Council (2001) ''[http://www.gao.gov/assets/590/588407.pdf A Practical Guide to Federal Enterprise Architecture Version 1.0]'' Preface. February 2001. </ref> in terms of interrelationship between the business, information, and technology environments of an enterprise.<ref name="CIOC99"> The Chief Information Officers Council (1999). [http://www.enterprise-architecture.info/Images/Documents/Federal%20EA%20Framework.pdf Federal Enterprise Architecture Framework Version 1.1]. September 1999.</ref>
Developed late 1980s by the [[National Institute of Standards and Technology]] (NIST) and others, this reference model in the 1990s becameis widely promoted within the [[Federal government of the United States|U.S. federal government]] as Enterprise Architecture management tool.<ref name="CIOC99"/>. It is applied as foundation in multiple U.S. Federal Enterprise Architecture frameworks, such as the [[Federal Enterprise Architecture Framework]].<ref name="CIOC99"/>
