Persistence Software

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Persistence Software was an American software company that operated from 1991 to 2004. Persistence developed software for Object-relational mapping. The company was founded in 1991 by Derek Henninger, Christopher Keene and Richard Jensen in San Mateo, California, working with Stanford Professors Gio Wiederhold and Arthur M Keller, who was the Chief Technical Advisor. In 1999, Persistence Software went public on NASDAQ under the ticker symbol PRSW. In 2004, Progress Software bought Persistence for $16 million.[1][2]


Persistence Software started life as a spinoff from Lighthouse Design. As the original NeXTSTEP computer shipped with a relational database and Objective-C, Lighthouse engineers had created a simple mapping utility called Exploder to store objects in a relational database.

The Persistence team worked with Stanford Professors to extend the object-relational mapping technology by adding the concepts of mapping related objects.[3]

Persistence created a series of products that integrated object-to-relational mapping, caching, and cache synchronization with automated cache management.[4][5] The products were marketed under the names PowerTier, EdgExtend, and DirectAlert.[6]

Sun Microsystems licensed the Persistence technology in 1998 which was later incorporated into the Enterprise JavaBeans standard.[7]


  1. ^ "Progress Software buys Persistence". Progress Software. September 2004.
  2. ^ "Progress Software To Buy Persistence". Information Week. September 2004.
  3. ^ Agarwal, Shailesh; Keene, Christopher; Keller, Arthur M. (August 1995). "Architecting Object Applications for High Performance with Relational Databases" (PDF). Stanford University.
  4. ^ Jensen, Richard; Agarwal, Shailesh; Keller, Arthur M. (May 1993). "Reflections on Object-Relational Applications" (PDF). SIGMOD.
  5. ^ Turner, Paul; Keller, Arthur M. (October 1995). "Reflections on Object-Relational Applications" (PDF). OOPSLA Workshop on Object and Relational Databases.
  6. ^ "Persistence Software Company Overview". Bloomberg BusinessWeek. August 2004.
  7. ^ "Persistence Software and Sun Microsystems Sign Technology Licensing Agreement". Business Wire. August 1995.

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