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 cathode ray tubes for their 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

(The instruction sets of the 701 and 704 were not, however, compatible.)

They were followed, and replaced, by the IBM 7000 series.

Further reading

  • Charles J. Bashe, Lyle R. Johnson, John H. Palmer, Emerson W. Pugh, IBM's Early Computers, MIT Press, Cambridge, 1986