Category:People using computers before 1940
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Media in category "People using computers before 1940"
The following 3 files are in this category, out of 3 total.
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1890 Census Hollerith Electrical Counting Machines Sci Amer.jpg 622 × 480; 99 KB
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1902 Hollerith electric tabulating machine.jpg 331 × 391; 22 KB
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DA Cambridge c1937.jpg 1,219 × 892; 234 KB