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| The 1130's operator is inserting a 2315 disk into the 1131 central processing unit. The 2315 provided a convenient way for users to store their own programs and data. The disk was encased in a protective plastic cartridge and could be stored by users in their own desks or office cabinets. Once inserted into the 1131, the disk was engaged in two ways. A power drive caused the disk to spin at 1500 revolutions a minute. At the same time, a forked arm extended to read and write on both magnetic surfaces of a spinning disk. Programs could be transferred from the disk to the 1130's core memory at the rate of 35,000 16-bit words a second. |
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