The normal variety of peripherals is also available, including magnetic drum units, card readers and punches, and an extensive set of analog-digital / digital-analog conversion devices.
2.
The IBM 701 computer ( 1952 1956 ) had a " Load " button that initiated reading of the first 36-bit card reader, a magnetic tape in a tape drive, or a magnetic drum unit, depending on the position of the Load Selector switch.
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