IBM 1301 Disk Storage Unit

The IBM 1301 Disk Storage Unit, with its larger capacity, flexibility and speed, greatly expanded the operational capability of the IBM 7000 series of computers (7070, 7094, 7080 and 7090). The 1301 increased the throughput of those large systems for many types of jobs, and with its unique organization of data, the 1301 added significantly to the time the 7000 mainframes could actually compute.