In 1956, IBM's RAMAC used 50 24-inch platters to store 5MB. Today, you can get 8GB on a single 1-inch platter. See how the hard drive evolved over half a century.
This 1957 prototype demonstrated a new technology using disk drive heads and tracks rather than magnetic tape. The first commercial use of the technology was IBM's 3330, in 1971.
Photo: Magnetic Disk Heritage Center
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