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In 1987, John Zachman, who was a marketing specialist at IBM, published the paper, ''A Framework for Information Systems Architecture''.<ref name="JZ 1987">[[John A. Zachman]] (1987). '' A Framework for Information Systems Architecture''. In: IBM Systems Journal, vol 26, no 3. IBM Publication G321-5298.</ref> The paper provided a classification scheme for [[Enterprise architecture artifacts|artifacts]] that describe (at several levels of abstraction) the what, how, where, who, when and why of information systems. Given IBM already employed BSP, Zachman had no need to provide planning process. The paper did not mention enterprise architecture.
In 1989, the National Institute of Standards and Technology (NIST) published the [[NIST Enterprise Architecture Model]].<ref>W.B. Rigdon (1989). ''Architectures and Standards''. In Information Management Directions: The Integration Challenge (NIST Special Publication 500-167), E.N. Fong, A.H. Goldfine (Eds.), Gaithersburg, MD: National Institute of Standards and Technology (NIST), pp.135-150.</ref> This was a five-layer reference model that illustrates the interrelationship of business, information system, and technology domains. It was promoted within the U.S. federal government. It was not an EA framework as we see it now, but it helped to establish the notion of dividing EA into architecture domains or layers. The NIST Enterprise Architecture Model seemingly was the first publication that consistently used the term "Enterprise Architecture".
In 1990, the term "Enterprise Architecture" was formally defined for the first time as an architecture that "defines and interrelates data, hardware, software, and communications resources, as well as the supporting organization required to maintain the overall physical structure required by the architecture".
In 1992, a paper by Zachman and Sowa<ref name="JZ 1992">Zachman and Sowa (1992) ''Extending and formalising the framework of information systems architecture'' IBM Systems Journal, Vol 31, No 3</ref> started thus "John Zachman introduced a framework for information systems architecture (ISA) that has been widely adopted by systems analysts and database designers." The term enterprise architecture did not appear. The paper was about using the ISA framework to describe, “...the overall information system and how it relates to the enterprise and its surrounding environment.” The word enterprise was used as a synonym for business.
In 1993, Stephen Spewak's book [[Enterprise Architecture Planning]] (EAP) defined a process for defining architectures for the use of information in support of the business and the plan for implementing those architectures. The business mission is the primary driver. Then the data required to satisfy the mission. Then the applications built to store and provide that data. Finally the technology to implement the applications. Enterprise Architecture Planning is a data-centric approach to architecture planning. An aim is to improve data quality, access to data, adaptability to changing requirements, data interoperability and sharing, and cost containment. EAP has its roots in IBM's [[Business Systems Planning]] (BSP).
In 1994, the Open Group selected [[TAFIM]] from the US DoD as a basis for development of TOGAF, where architecture meant IT architecture. TOGAF started out taking a strategic and enterprise-wide, but technology-oriented, view. It emerged from the desire to rationalize a messy IT estate. Right up to version 7, TOGAF was still focused on defining and using a Technical Reference Model (or foundation architecture) to define the platform services required from the technologies that an entire enterprise uses to support business applications.<ref name="GB 2013"/>
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