The IBM 350, the world’s first hard drive from 1956, weighed one ton, held 3.75 MB of data, and cost about $37,600 per month in today's currency to lease.

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The IBM 350, the world’s first hard drive from 1956, weighed one ton, held 3.75 MB of data, and cost about $37,600 per month in today's currency to lease.
"New computer. Who dis?"
(Robert W. Kelley. 1961)
IBM launched the 305 RAMAC, the first computer with a hard disk drive (HDD) in September 1956. The HDD weighed over a ton and stored 5MB of data. – WTF Fun Facts Source: http://ed-thelen.org/RAMAC/Myths.html
The first commercial hard disk drive-based computer was IBM RAMAC that has 5 MB of storage space.
#Technology: In 1956 when Ibm launched Ramac, The first computer with something like a hard drive with 5 mega bites of Data weighed a ton.
Interested to see more facts click here: https://bit.ly/2TbYwDJ
IBM 305 & 360 RAMAC. Random access memory - IBM - 1957. Source: https://www.vialibri.net/item_pg_i/1220576-1957-ibm-ibm-305-360-ramac-random-access-memory-accounting.htm
IBM 350 RAMAC - 2006 News Item “Lug 60,000 of those around and you’re gonna build some real muscles.”
IBM RAMAC systems are shown being manufactured in Building 5 of the new plant site at Monterey and Cottle Roads in San Jose, 1957.