Larry Ellison: Relational database technology was invented by a guy by the name of Ted Codd at IBM. It’s based on relational algebra and relational calculus. It is a very mathematically rigorous form of data management that we can prove mathematically to be functionally complete. This work was done in the early seventies by an IBM fellow by the name of Ted Codd. He published his papers, and really, based on those publications, Oracle decided to see if we (we were four guys) couldn’t beat IBM to market with this technology, based on the published IBM research papers. And in fact we did.