jan 1, 1956 - RAMAC

Description:

Hard Disk Drive
Three generations of RAMAC drives were developed for the 305, 650, 1401, 1410 and 7070 computers
http://www.computerhistory.org/storageengine/first-commercial-hard-disk-drive-shipped/
first magnetic disk drive assembly with movable read-write heads
50 coated aluminum disks
24" diameter
1,200 revolutions/minute
5 million characters
like 50,000 IBM cards

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