ਹਾਰਡ ਡਿਸਕ ਦੀ ਖੋਜ ਕਿਸ ਨੇ ਕੀਤੀ ? Who invented the hard disk *
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3
Answer:
Reynold B Johnson invented the hard disk
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2
Answer:
hard disk di khoj IBM , reynold d johnson
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