System R: relational approach to database management
ACM Transactions on Database Systems (TODS)
Relational database: a practical foundation for productivity
Communications of the ACM
A history and evaluation of System R
Communications of the ACM
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This issue of the IBM Systems Journal focuses on aspects of three recently announced ISM relational data base products. They are IBM Database 2, Query Management Facility, and Data Extract. This essay illustrates the requirements that these products were designed to address and gives a brief overview of their content and history. Its objective is to provide an introduction to the more specific and detailed papers that follow.