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Wednesday, August 21, 2013

The first Hard Disk in the world


...IBM 305 RAMAC...
# RAMAC:- Random Access Method of Accounting and Control..
# Introduced in 1956 by IBM...
# Inventor was Reynold Johnson...
# Only for commercial use...
# Size of Platters:- 50-24 inches to store 5 MB data...
# Its cost was roughly $35000 per year to lease or $7000 per MB per year...
# It was very bulky(in tons) and transported by helicopters or areoplanes....
admin:- suraj mishra

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