As software application technology changed over the decades the evolution in languages and their capabilities resulted in a steady pervasion in computing. With it, of course, there has also been a matching evolution in database storage and retrieval methods. At first there were simple flat files, but this quickly proved to be inefficient in many ways. Then there were hierarchical databases with VSAM and ISAM files and while these suited the processing paradigms of those times (which was Read More..
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