IBM introduces the IBM 350

13th September 1956
IBM introduces the IBM 350

IBM introduces the IBM 350 Disk File, the first hard drive, as part of the IBM RAMAC 305 computer. The drive features fifty double-sided 24-inch diameter platters, served by one arm and one read/write head. Capacity is about 5 MB, and transfer rate is 8800 characters per second. (The first hard drives for personal computers will appear in about 15 years, also with a capacity of about 5 MB.)


 

 

 

 

IBM introduces the IBM 350

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