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|quote=The product was called SQL/DS (Structured Query Language/Data Store) and ran under the DOS/VSE operating system environment}}</ref>
The first system sold as an RDBMS was [[Multics Relational Data Store]] (June 1976).{{citation needed|reason=Due to significance of nature of claim specific unambiguous cite is required at this point|date=August 2020}} [[Oracle Database|Oracle]] was released in 1979 by Relational Software, now [[Oracle Corporation]].<ref>{{cite journal |date=May 2007 |title=Oracle Timeline |journal=Profit Magazine |publisher=Oracle |volume=12 |issue=2 |page=26 |url=http://www.oracle.com/us/corporate/profit/p27anniv-timeline-151918.pdf |access-date=2013-05-16}}</ref> [[Ingres (database)|Ingres]] and [[IBM BS12]] followed. Other examples of an RDBMS include [[IBM Db2]], [[Adaptive Server Enterprise|SAP Sybase ASE]], and [[IBM Informix|Informix]]. In 1984, the first RDBMS for [[Macintosh 128K|Macintosh]] began being developed, code-named Silver Surfer, and was released in 1987 as [[4th Dimension (Software)|4th Dimension]] and known today as 4D.<ref>{{cite web |title=New Database Software Program Moves Macintosh Into The Big Leagues |website=tribunedigital-chicagotribune |date=28 June 1987 |url=
The first systems that were relatively faithful implementations of the relational model were from:
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