More than 1,000 systems were built before production ended in 1961. The RAMAC became obsolete one year later when the IBM 1405 disk storage unit for the IBM 1401 was introduced. The 305 was withdrawn ...

Production of the IBM 305 RAMAC ended in 1961, as it became obsolete following the introduction of IBM's 1405 Disk Storage Unit for the IBM 1401 computer. Over the next two decades, ...