Most early calculating machines carried out multiplication as a form of repeated addition. To multiply, say, by thirteen, one set the carriage at its rightmost position, turned the operating crank ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This lightweight modified stepped ...

Unlike Texas Instruments, whose graphing calculators have famously not made technological improvements in decades despite ...

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