Adabas D is a relational database management system owned by Software AG since 1994, when Software AG acquired SQL-Datenbanksysteme GmbH from Siemens Nixdorf AG.
SAP AG's MaxDB is based on a version of ADABAS D version 188.8.131.52, 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) made use of Adabas D for its product StarOffice, and the personal edition of Adabas D was included in SuSE Linux.[dated info] An Adabas D adapter is provided in OpenOffice.org.