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NORC magnetic tape units

NORC magnetic tape units
Operating instructions and problem data were read into NORC from the ultra high-speed magnetic tape units shown here. More than five times faster than the fastest magnetic tape units then in use, each of eight of these units -- developed at IBM's Poughkeepsie Lab -- could read and write more than 70,000 digits a second, a speed equivalent to that of 14,000 typists. In addition to their use for input and output, the tapes also stored intermediate results during calculations.