100 Years of IBM in Pictures
From clocks to supercomputers, IBM has a rich history of technological developments. Here’s a look back at its most notable innovations.
IBM 4 (1956)
IBM’s RAMAC (Random Access Method of Accounting and Control), an early computer designed for accounting, was introduced in 1956. The whole system was about the size of two side-by-side refrigerators and weighed about 10 tons. It contained the world’s first magnetic hard disk drive, capable of storing 10 megabits of information.

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