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== History ==
[[Larry Ellison]] and his two friends and former co-workers, [[Bob Miner]] and [[Ed Oates]], started a consultancy called Software Development Laboratories (SDL) in 1977, later [[Oracle Corporation]]. SDL developed the original version of the Oracle software. The name ''Oracle'' comes from the code-name of a [[Central Intelligence Agency|CIA]]-funded project Ellison had worked on while formerly employed by [[Ampex]];<ref>{{cite web|url=https://www.theguardian.com/g2/story/0,3604,215072,00.html|title=Welcome to Larryland|work=The Guardian|access-date=2009-12-19|archive-url=https://web.archive.org/web/20160825232818/https://www.theguardian.com/g2/story/0,3604,215072,00.html|archive-date=25 August 2016|url-status=live}}</ref> CIA was Oracle's first customer, and allowed the company to use the code name for the new product.<ref name="rdbmsoracle20070612">{{Cite interview |interviewer=Luanne Johnson |title=RDBMS Workshop: Oracle |type=PDF |url=https://www.computerhistory.org/collections/catalog/102746581 |access-date=2025-06-01 |publisher=Computer History Museum |date=2007-06-12}}</ref>
Ellison wanted his database to be compatible with [[IBM System R]], but that company's [[Don Chamberlin]] declined to release its error codes.{{r|rdbmsearlyyearsoh20070612}} By 1985 Oracle advertised, however, that "Programs written for [[SQL/DS]] or [[DB2]] will run unmodified" on the many non-IBM mainframes, minicomputers, and microcomputers its database supported "Because all versions of ORACLE ''are'' identical".<ref name="oracle19850520">{{Cite magazine |date=1985-05-20 |title=Oracle announces portable version of IBM SQL/DS and DB2 |url=https://books.google.com/books?id=ygHfUXZWXlcC&pg=PA47#v=onepage&q&f=true |access-date=2025-06-07 |magazine=Computerworld |page=47 |type=Advertisement |volume=XIX |issue=20}}</ref>
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