The IBM 305 RAMAC was the first commercial computer that used a moving-head hard disk drive (magnetic disk storage) for secondary storage. [1] The system was publicly announced on …

The IBM 350 disk storage unit, the first disk drive, was announced by IBM as a component of the IBM 305 RAMAC computer system on September 14, 1956. [8][9][10][11] Simultaneously a …

The first random-access disk drive revolutionized how businesses use computers and set the stage for everything from space flight to e-commerce.

IBM 305 RAMAC是第一台带有硬盘驱动器（HDD）的超级计算机，重量超过1吨，可存储5MB数据，相当于目前数码相机中闪存卡的百分之一。 IBM于1956年9月13日推出RAMAC，其字母代 …

On September 14, 1956, at IBM's Glendale Laboratory in Endicott, New York, IBM demonstrated the 305 RAMAC (R andom A ccess M ethod of A ccounting and C ontrol) Magnetic Drum Data …

2018年9月13日 · IBM 305 RAMAC是第一台带有硬盘驱动器（HDD）的超级计算机，重量超过1吨，可存储5MB数据，相当于目前数码相机中闪存卡的百分之一。 IBM于1956年9月13日推 …

2011年12月26日 · In September 1956, IBM launched the 305 RAMAC (Random Access Method of Accounting and Control), the first commercial computer that used a moving-head hard disk …

2013年1月10日 · From the bitsavers.org collection, a scanned-in computer-related document.ibm :: 305 ramac :: A26-3502-0 305 RAMAC Reference Manual 1958

2019年9月13日 · Weighing in at more than a ton and storing 5MB of data, the IBM 305 RAMAC was the first supercomputer with a hard disk drive (HDD). Introduced by IBM on September …

2010年3月17日 · The IBM 305 RAMAC, which debuted in 1956, was the first computer with a hard drive. It was 16 square feet, weighed over a ton, and had to be transported by plane. But …