IBM led data processing in a new direction with the 1957 delivery of the IBM 305 Random Access Method of Accounting and Control (RAMAC), the first computer disk storage system.是什么意思_IBM led data processing in a new direction with the 1957 delivery of the IBM 305 Random Access Method of Accounting and Control (RAMAC), the first computer disk storage system.在线翻译_英语_读音_用法_例句