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IBM, it was designed to boot load microcode (µIPL in IBM terminology) for their System/370 computers introduced in 1971. The original floppy discs used by IBM were 8 inch diameter and had a capacity of only 80,000 bytes.

The IBM engineer that designed the disc drive that the System/370 used to read microcode from these discs was Alan Shugart. He eventually left IBM to start his own disc drive company.

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∙ 15y ago

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