'''NIST Enterprise Architecture Model''' ('''NIST EA Model''') is a late-1980s [[Enterpriseenterprise Architecturearchitecture framework|reference model]] for [[Enterpriseenterprise Architecturearchitecture]],. whichIt defines the content of an enterprise architecture<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> inby terms ofthe interrelationship between thean enterprise's 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 is widely promoted within the [[Federalfederal government of the United States|U.S. federal government]] aspromoted Enterprisethis Architecturereference managementmodel tool.<refin name="CIOC99"/>the It is applied1990s as the foundation infor multipleenterprise Enterprisearchitectures Architectureof frameworks ofindividual U.S. Federal government agencies and in the overall [[Federal Enterprisefederal Architectureenterprise Frameworkarchitecture]].<ref name="CIOC99"/>
