IBM 700 series

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The IBM 700 series was IBM's first generation of computers. They all used vacuum tubes for the logic; initial models used Williams tube electrostatic main memory, but all later models switched to core memory.

At this point in time, computers for scientific and business computing used separate instruction sets, so there were two independent lines of models:

Scientific	Commercial
IBM 701	IBM 702
IBM 704	IBM 705
IBM 709	IBM 705 III

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