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From: Andy Nolen-Parkhouse <aparkhouse@xxxxxxxxx> > The relational database has been part of the OS/400 operating system > since day one (1988). Before that it was part of CPF on the S/38. It was not relational at the time and still isn't. The relational stuff is built on top of a basic ISAM-type database allowing split-key alternate indices (A.K.A. logical files).
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