Guess, what this is ?

Managed a guess ? No ?

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A small vague hint : This picture was taken in the year 1956 !!!

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Made a guess yet ? No ? OK ..... here is the answer .....

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This is an actual mainframe computer hard disk drive, with 5 MB of storage space ! In September 1956, I.B.M. launched the " 305 RAMAC " It was called the world's first "Super Computer " with a hard disk drive ( H.D.D.). The HDD weighed over a Ton and stored a " Whopping " 5 MB of data !

Do you appreciate your little 20 GB memory stick, a little more now ?

Source: Techzug

Related Reading: From 20 MB to 2 TB HDD