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WonderFact432 of 1,961

IBM's RAMAC 350, the first commercial hard disk drive (1956), stored 5 megabytes and weighed over a ton (about 1,000 kg).

IBM

TechnologyHistory

Why it matters

The idea in context

IBM's RAMAC 350 in 1956 was the first commercial hard drive, storing 5 MB in a cabinet the size of a wardrobe — a phone today holds thousands of times more in a pocket.

Türkçe

Aynı kart, başka bir dilde.

İlk ticari sabit disk sürücüsü olan IBM RAMAC 350 (1956), 5 megabayt veri depoluyor ve bir tondan (yaklaşık 1.000 kg) fazla geliyordu.
IBM

IBM'in 1956'daki RAMAC 350'si, bir gardırop büyüklüğündeki dolapta 5 MB depolayan ilk ticari sabit diskti — bugün bir telefon, cepte binlerce katını taşıyor.

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Background reading: IBM 305 RAMACAttribution and context are revised when stronger evidence appears. Corrections are welcome through the editorial page.
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The Apollo Guidance Computer flew astronauts to the Moon with about 4 KB of working memory — your phone has roughly a million times more.

The AGC had about 4 KB of RAM, 72 KB of fixed 'rope core' memory, and ran at roughly 1 MHz — less computing power than a musical greeting card. Yet in 1969 it steered Apollo 11 across 380,000 km, ran the landing radar, and even recovered gracefully from overload alarms minutes before touchdown. The story is not about weak hardware; it is about what disciplined engineering, compact code and ruthless prioritising can do under impossible constraints.

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