IBM 705 (1954)
The IBM 705 Electronic Data Processing Machine was announced in October 1954. The 705 was a successor to the IBM 702. The 705 used magnetic core memory which could hold 20,000 characters, twice that of the IBM 702.
The 705 model III (September 1957) was IBM's last large-scale vacuum tube based machine.
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An Encyclopedia of the People and Machines that Made Computer History
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