| 1. | The relays were operated by electrical impulses initiated by a punched tape.
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| 2. | The system accepted input on punched tape produced by a Friden Flexowriter.
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| 3. | Beginning in 1957 the Z11 could be programmed by punched tapes.
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| 4. | Peripherals included punched tape readers, punched card readers, and line printers.
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| 5. | The punched tape served not only for data entry, but also as memory storage.
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| 6. | The figure groups between which differences were to be made were on punched tape.
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| 7. | Flowers designed shift registers one for each of the five channels of the punched tape.
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| 8. | Various offline input / output included magnetic disks, tape drives, punched cards, punched tape and printers.
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| 9. | In-and output was done by teleprinter, punched tape and punched cards, output also by a type-printer.
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| 10. | Peripheral equipment ( Punched tape ) 3.
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