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===IBM 7094===
[[File:IBM 7094
An upgraded version, the '''IBM 7094''', was first installed in September 1962. It has seven [[index register]]s, instead of three on the earlier machines. The 7094 console has a distinctive box on top that displays lights for the four new index registers.<ref>{{Cite web|url=http://www.columbia.edu/acis/history/7094.html|title = The IBM 7094}}</ref> The 7094 introduced double-precision floating point and additional [[Instruction set architecture|instructions]], but largely maintained [[backward compatibility]] with the 7090.
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