Adabas D is a relational database management system

Relational database management system

A relational database management system is a database management system that is based on the relational model as introduced by E. F. Codd. Most popular databases currently in use are based on the relational database model....

 owned by Software AG

Software AG

Founded in 1969, Software AG is an enterprise software company with over 10,000 enterprise customers in over 70 countries. The company is the second largest software vendor in Germany, the fourth in Europe and among the top 25 globally...

 since 1994, when Software AG acquired SQL-Datenbanksysteme GmbH from Siemens Nixdorf AG.

SAP AG

SAP AG

SAP AG is a German software corporation that makes enterprise software to manage business operations and customer relations. Headquartered in Walldorf, Baden-Württemberg, with regional offices around the world, SAP is the market leader in enterprise application software...

's MaxDB

MaxDB

MaxDB is an ANSI SQL-92 compliant relational database management system from SAP AG, which was delivered also by MySQL AB from 2003 to 2007. MaxDB is targeted for large SAP environments e.g. mySAP Business Suite and other applications that require enterprise-level database functionality...

 is based on a version of ADABAS D version 6.1.15.57, licensed from Software AG in 1997, and originally sold as SAP DB. MaxDB is provided for use with SAP, as an alternative to other more costly RDBMS systems.

StarDivision (and later Sun Microsystems

Sun Microsystems

Sun Microsystems, Inc. was a company that sold :computers, computer components, :computer software, and :information technology services. Sun was founded on February 24, 1982...

) made use of Adabas D for its product StarOffice

StarOffice

StarOffice, known briefly as Oracle Open Office before its discontinuation in 2010, is a proprietary office suite. It was originally developed by StarDivision which was acquired by Sun Microsystems in 1999...

, and the personal edition of Adabas D was included in SuSE Linux. An Adabas D adapter is provided in OpenOffice.org

OpenOffice.org

OpenOffice.org, commonly known as OOo or OpenOffice, is an open-source application suite whose main components are for word processing, spreadsheets, presentations, graphics, and databases. OpenOffice is available for a number of different computer operating systems, is distributed as free software...

.