Editing Ingres (database) (section)

===Relational Technologies, Inc. (RTI)===
Several companies used the Ingres source code to produce products. The most successful was a company named [[Relational Technology, Inc.]] (RTI), founded in 1980 by Stonebraker and Wong, and another Berkeley professor, Lawrence A. Rowe.<ref>{{cite web |title=Eugene Wong  |website=EECS at UC Berkeley
|url=https://www2.eecs.berkeley.edu/Faculty/Homepages/wong.html
|quote=Eugene Wong ... In 1980 he co-founded (with Michael Stonebraker and Lawrence A. Rowe) ... Relational Technology, Inc., later renamed the INGRES Corporation}}</ref> RTI was renamed Ingres Corporation in the late 1980s. The company ported the code to DEC [[VAX/VMS]], which was the commercial [[operating system]] for [[DEC VAX]] computers. They also developed a collection of front-end tools for creating and manipulating databases (e.g., reporterwriters, forms entry and update, etc.) and application development tools. Over time, much of the source was rewritten to add functionality (for example, multiple-statement transactions, SQL, B-tree access method, date/time datatypes, etc.) and improve performance (for example, compiled queries, multithreaded server).

Project Jewel was an early prototype of abstract data types. Ingres was the first database to be certified as a "Rainbow Book" B2 certified database, as such it was adopted by the US National Laboratories (Los Alamos, Livermore, Sandia) for storage for the design of Nuclear weapons. It was also deployed by the CIA. Support needs for highly classified air gapped systems led to the creation of an Expert System for problem resolution hosted on the DARPA network.

After DEC withdrew from a planned investment in Ingres,{{r|rdbmsfinancing20070612}} the company was purchased by [[ASK Corporation]] in November 1990.  The founders left the company over the next several months.